{"id":81,"date":"2010-04-17T21:56:20","date_gmt":"2010-04-18T06:56:20","guid":{"rendered":"\/blog\/?p=81"},"modified":"2023-09-21T09:41:18","modified_gmt":"2023-09-21T00:41:18","slug":"%ed%94%84%eb%a1%9c%ea%b7%b8%eb%9e%a8-%eb%9d%bc%ec%9d%b4%eb%b8%8c%eb%9f%ac%eb%a6%ac-%ed%95%98%ec%9a%b0%ed%88%ac","status":"publish","type":"post","link":"https:\/\/hasu0707.duckdns.org\/blog\/?p=81","title":{"rendered":"\ud504\ub85c\uadf8\ub7a8 \ub77c\uc774\ube0c\ub7ec\ub9ac \ud558\uc6b0\ud22c"},"content":{"rendered":"\n

\ud504\ub85c\uadf8\ub7a8 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN> \ud558\uc6b0\ud22c<\/FONT><\/H1>\n

David A. Wheeler\uc9c0\uc74c<\/FONT><\/H2>\ubc84\uc804 0.60, 2000\ub144 4\uc6d4 27\uc77c <\/FONT>\n

\ubc88\uc5ed : \ud669 \uc9c4 \ud76c( <\/FONT>jeenee@soback.kornet.net<\/FONT><\/A>)<\/FONT><\/H2>2000\ub144 5\uc6d4 <\/FONT>\n\n
\n\uc774 \ud558\uc6b0\ud22c \ubb38\uc11c\ub294 \ud504\ub85c\uadf8\ub798\uba38\uac00 \uc5b4\ub5bb\uac8c \ub9ac\ub205\uc2a4\ud658\uacbd\uc5d0\uc11c \ud504\ub85c\uadf8\ub7a8 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN> \ub97c \uc0dd\uc131<\/SPAN>\ud558\uace0 \uc0ac\uc6a9\ud560\uc218 \uc788\ub294\uc9c0\ub97c \ub2e4\ub8e8\uace0 \uc788\uc73c\uba70 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc5d0\ub294 \uc815\uc801 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>, \uacf5\uc720 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN> \ubc0f \ub3d9\uc801<\/SPAN>(DL) \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uac00 \uc788\ub2e4. <\/EM>\n
\n<\/FONT>\n

2. \uc815\uc801 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN><\/FONT><\/A><\/H2>\n

\uc815\uc801 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub294 \ub2e8\uc9c0 \ud1b5\uc0c1\uc758 \uc624\ube0c\uc81d\ud2b8 \ud654\uc77c\uc744 \ubaa8\uc740\uac83\uc774\ub2e4. \ud1b5\uc0c1\uc801\uc73c\ub85c \uc815 \uc801 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub294 .a\ub77c\ub294 \uc811\ubbf8\uc5b4\ub85c \ub05d\ub09c\ub2e4. \uc774 \uc624\ube0c\uc81d\ud2b8 \uc9d1\ud569\uc740 ar<\/SPAN>(ar<\/SPAN>chiver) \ud504\ub85c\uadf8\ub7a8\uc5d0 \uc758\ud574\uc11c \uc0dd\uc131<\/SPAN>\ub41c\ub2e4. \uc815\uc801 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub294 \uacf5\uc720 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uac00 \uac00\uc9c0\ub294 \uc7a5 \uc810\ub4e4 \ub54c\ubb38\uc5d0 \uc774\uc81c\ub294 \uc61b\ub0a0\ucc98\ub7fc \uadf8\ub807\uac8c \ub9ce\uc774 \uc0ac\uc6a9\ub418\uc5b4 \uc9c0\uc9c0\ub294 \uc54a\ub294\ub2e4. \uadf8\ub807\uc9c0\ub9cc \uc544\uc9c1\ub3c4 \uc0ac\uc6a9\ub418\uc5b4 \uc9c0\uace0 \uc788\uace0 \uc5ed\uc0ac\uc801\uc73c\ub85c \uac00\uc7a5\uba3c\uc800 \uc874\uc7ac\ud588\uace0 \uc124\uba85\uc774 \uac04\ub2e8\ud558\ub2e4. \uc815\uc801 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub294 \uc7ac\ucef4\ud30c\uc77c\uc5c6\uc774 \ud504\ub85c\uadf8\ub7a8\uc5d0 \ub9c1\ud06c\ub420\uc218 \uc788\uae30 \ub54c\ubb38\uc5d0 \uc7ac\ucef4\ud30c\uc77c \uc5d0 \ud544\uc694\ud55c \uc2dc\uac04\uc774 \uc808\uc57d\ub420\uc218 \uc788\ub2e4. \uc694\uc998\uc740 \ucef4\ud4e8\ud130\uc758 \ube60\ub978 \uc2e4\ud589\uc2dc\uac04\ub54c\ubb38\uc5d0 \uc774\ub7f0 \uc7ac\ucef4\ud30c\uc77c\uc5d0 \ub4dc\ub294 \uc2dc\uac04 \uc808\uc57d\uc740 \uc61b\ub0a0\ucc98\ub7fc \uadf8\ub807\uac8c \uc911\uc694\ud55c \uc774\uc720\uac00 \ub420\uc218\ub294 \uc5c6\uc744 \uac83\uc774\ub2e4. \uc815\uc801 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub294 \uac1c\ubc1c\uc790\ub4e4\uc774 \uc18c\uc2a4\ucf54\ub4dc\uc758 \uc7ac\uacf5\uc5c6\uc774 \ud504\ub85c\uadf8\ub798\uba38\ub4e4\ub85c \ud558\uc5ec\uae08 \ub9c1\ud06c\ud558\uc5ec \uc0ac\uc6a9\ud558\ub3c4\ub85d \ud560\ub54c\ub294 \uac00\ub054\uc529 \uc720\uc6a9\ud55c \uac83\uc774\ub41c\ub2e4. (\uc774\ub54c \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc758 \ud310\ub9e4\uc790\ub294 \uc774\uc775\uc774\uc9c0\ub9cc \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \uc774\uc6a9\ud558\uace0\uc790 \ud558\ub294 \ud504\ub85c\uadf8\ub798\uba38\ub4e4\uc5d0\uac8c \ub294 \uc720\uc6a9\ud55c\uac83\uc774 \uc544\ub2c8\ub2e4.) \uc774\ub860\uc0c1\uc73c\ub85c \uc2e4\ud589\ud30c\uc77c\uc5d0 \ub9c1\ud06c\ub418\ub294 \uc815\uc801 ELF \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN> \ucf54\ub4dc\ub294 1-5%\uc815\ub3c4 \ube68\ub9ac \uc218\ud589\ub418\uc5b4\uc838\uc57c\ud558\ub098 \uc2e4\uc81c\uc5d0 \uc788\uc5b4\uc11c\ub294 \ub2e4\ub978 \uc5ec\ub7ec\uac00\uc9c0 \ubcf5\ud569\uc801\uc778 \uc774\uc720\ub85c \uc778\ud558\uc5ec \uc774\ub7f0 \uc608\ub294 \uc798 \ub9de\uc9c0 \uc54a\ub294\uac83 \uac19\ub2e4. <\/FONT>\n

\uc815\uc801 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \uc0dd\uc131<\/SPAN>\ud558\uac70\ub098 \uae30\uc874\uc758 \uc815\uc801 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc5d0 \ubd80\uac00\uc801 \uc624\ube0c\uc81d\ud2b8 \ud30c\uc77c\uc744 \ucd94\uac00\ud560 \uacbd\uc6b0 \ub2e4\uc74c\uc758 \uba85\ub839\uc744 \uc0ac\uc6a9\ud55c\ub2e4. <\/FONT>\n

ar<\/SPAN> rcs my_librar<\/SPAN>y.a file1.o file2.o \uc704\uc758 \uc608\uc758 \uba85\ub839\uc740 file1.o file2.o\ub77c\ub294 \uc624\ube0c\uc81d\ud2b8 \ud30c\uc77c\uc744 mylibrar<\/SPAN>y.a\uc5d0 \ucd94\uac00\ud558 \uac70\ub098 \uc874\uc7ac\ud558\uc9c0 \uc54a\uc744\uacbd\uc6b0 \uc774 \ud30c\uc77c\uc744 \uc0dd\uc131<\/SPAN>\ud55c\ub2e4. \uc815\uc801 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN> \uc0dd\uc131<\/SPAN>\uacfc \uad00\ub828\ud55c \ub354 \uc774\uc0c1\uc758 \uc815\ubcf4\ub294 ar<\/SPAN>(1)\uc744 \ubcf4\uae30 \ubc14\ub780\ub2e4. <\/FONT>\n

\uc815\uc801 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \ub2f9\uc2e0\uc774 \ub9cc\ub4e4\uc5c8\ub2e4\uba74 \uc0ac\uc6a9\ud558\uae30\ub97c \uc6d0\ud560 \uac83\uc774\ub2e4. \uc774\ub97c \uc0ac\uc6a9\ud558 \ub824\uba74 \uc2e4\ud589 \ud504\ub85c\uadf8\ub7a8\uc744 \uc0dd\uc131<\/SPAN>\ud558\uae30 \uc704\ud55c \ucef4\ud30c\uc77c\uacfc \ub9c1\ud06c\uacfc\uc815\uc758 \ud55c \ubd80\ubd84\uc5d0 \uc774 \ud30c \uc77c\uc744 \ud3ec\ud568\uc2dc\ud0a4\uba74 \ub41c\ub2e4. \ub9cc\uc57d\uc5d0 gcc(1)\uc744 \uc0ac\uc6a9\ud558\uc5ec \uc2e4\ud589\ud30c\uc77c\uc744 \ub9cc\ub4e0\ub2e4\uba74 -l \uc635 \uc158\uc744 \uc0ac\uc6a9\ud558\uc5ec \ub2f9\uc2e0\uc774 \ub9cc\ub4e0 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \uba85\uc2dc\ud558\uba74 \ub41c\ub2e4. (info:gcc\uc744 \ucc38\uc870\ud558 \uba74 \ub354 \ub9ce\uc740 \uc815\ubcf4\ub97c \uc5bb\uc744\uc218 \uc788\uc74c). \ub9c1\ucee4\uc778 ld(1)\ub97c \ubc14\ub85c \uc0ac\uc6a9\ud558\uc5ec\ub3c4(-l,\ub614\ub290 -L \uc635\uc158) \ub418\ub098 ld(1)\uc758 \uc778\ud130\ud398\uc774\uc2a4\uac00 \uc790\uc8fc \ubcc0\ud558\ubbc0\ub85c gcc(1)\uc744 \uc4f0\ub294 \uac83\uc774 \ub354 \ub098 \uc744 \uac83\uc774\ub2e4. <\/FONT>\n

3. \uacf5\uc720 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN><\/FONT><\/A><\/H2>\n

\uacf5\uc720 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub780 \ud504\ub85c\uadf8\ub7a8\uc774 \uc2dc\uc791\ub420 \ub54c \uc774 \ud504\ub85c\uadf8\ub7a8\uc5d0 \uc758\ud574\uc11c \uc801\uc7ac\ub418\ub294 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \ub9d0\ud55c\ub2e4. \uc5b4\ub5a4 \uacf5\uc720 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uac00 \ubc14\ub974\uac8c \uc801\uc7ac\uc5c8\ub2e4\uba74 \uc774\ud6c4\uc5d0 \uc2e4\ud589\ub418 \ub294 \ubaa8\ub4e0 \ud504\ub85c\uadf8\ub7a8\ub4e4\uc740 \uc790\ub3d9\uc801<\/SPAN>\uc73c\ub85c \uc774 \uc0c8\ub85c\uc6b4 \uacf5\uc720 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \uc0ac\uc6a9\ud560 \uac83\uc774 \ub2e4. \uc2e4\uc7ac\uc5d0 \uc788\uc5b4\uc11c, \ub9ac\ub205\uc2a4\uc5d0\uc11c \uc0ac\uc6a9\ub418\ub294 \uc811\uadfc\ubc29\uc2dd\uc740 \uc544\ub798\uc640 \uac19\uc740 \uae30\ub2a5\ub4e4\uc744 \ud5c8 \uc6a9\ud558\ubbc0\ub85c \ub354\uc6b1 \ud0c4\ub825\uc801\uc774\uba70 \ub610\ud55c, \uc138\ub828\ub418\uac8c \uae30\ub2a5\ud55c\ub2e4. <\/FONT>\n

* \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \uac31\uc2e0\ud558\uba74\uc11c \uc774 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc758 \uad6c\ubc84\uc804 \uc9c0\uc6d0\uc6a9 \ubc84\uc804\uc774 \uc5c6\uc774\ub3c4 \uc5ec\uc804\ud788 \uad6c \ubc84\uc804\uc758 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc758 \uc0ac\uc6a9\uc744 \uc6d0\ud558\ub294 \ud504\ub85c\uadf8\ub7a8\uc744 \uc9c0\uc6d0\ud560\uc218 \uc788\ub2e4. <\/FONT>\n

* \ud2b9\uc815 \ud504\ub85c\uadf8\ub7a8\uc758 \uc218\ud589\uc2dc \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN> \ub610\ub294 \uc2ec\uc9c0\uc5b4 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc758 \ud2b9\uc815\ud568\uc218\uc758 \uc624\ubc84\ub77c\uc774\ub529(\ub300\uce58)\uc774 \uac00\ub2a5\ud558\ub2e4. <\/FONT>\n

* \uc774 \ubaa8\ub4e0 \uae30\ub2a5\uc744 \uae30\uc874\uc758 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \uc774\uc6a9\ud558\uc5ec \ud504\ub85c\uadf8\ub7a8 \uc2e4\ud589\uc911\uc5d0 \uac00\ub2a5\ud558 \ub2e4. <\/FONT>\n

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\uad00 \ub840<\/B> <\/FONT>\n
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\uacf5\uc720 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uac00 \uc774\ub7ec\ud55c \uae30\ub2a5\ub4e4\uc744 \uc9c0\uc6d0\ud558\uae30 \uc704\ud574\uc11c\ub294 \uc0ac\uc6a9\uc790\uac00 \ubc18\ub4dc\uc2dc \ub530 \ub77c\uc57c\ud560 \uc774\uc6a9\uc0c1\uc758 \uba87\uac00\uc9c0 \uad00\ub840\uc640 \uac00\uc774\ub4dc\ub77c\uc778\uc774 \uc788\ub2e4. \ub2f9\uc2e0\uc740 \ud55c \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \uc77c\uceeb\ub294 \uc774\ub984\ub4e4\uc758 \ucc28\uc774 \ud2b9\ud788 \"soname\"\uacfc \"real name\"\uc744 \uad6c\ubcc4\ud560\uc218 \uc788\uc5b4\uc57c\ud558 \uba70, (\ub610\ud55c \uc774\ub4e4\uc774 \uc5b4\ub5bb\uac8c \uc0c1\ud638\uc791\uc6a9 \ud558\ub294\uac00\ub3c4 \uc54c\uc544\uc57c \ud55c\ub2e4) \ub610\ud55c, \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uac00 \ud30c\uc77c \uc2dc\uc2a4\ud15c\uc0c1\uc758 \uc5b4\ub514\uc5d0 \uc704\uce58\ud574\uc57c \ud558\ub294\uac00\ub3c4 \uc54c\uc544\uc57c \ud55c\ub2e4. <\/FONT><\/P>\n

\uacf5\uc720 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN> \uc774\ub984\ub4e4<\/B> <\/FONT>\n
\n

\ubaa8\ub4e0 \uacf5\uc720 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub294 \"soname\"\uc774\ub77c \ubd88\ub9ac\ub294 \ud2b9\ubcc4\ud55c \uc774\ub984\uc744 \uac00\uc9c0\uace0 \uc788\ub2e4. \"soname\"\uc740 \uc811\ub450\uc5b4 \"lib\", \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN> \uc774\ub984, \".so\"\ub77c\ub294 \ubb38\uad6c, \uadf8 \ub2e4\uc74c \ub9c8\uce68\ud45c\uc640 \uc778\ud130\ud398\uc774\uc2a4 \ubcc0\uacbd\uc2dc \uc99d\uac00\ub418\ub294 \ubc84\uc804 \ub118\ubc84\ub85c \uad6c\uc131\ub41c\ub2e4. ( \uc608\uc678\ub85c \uac00\uc7a5 \uc800\uc218\uc900\uc758 C\ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub4e4\uc740 \"lib\"\ub85c \uc2dc\uc791\ub418\uc9c0 \uc54a\ub294\ub2e4) \uc644\uc804\ud55c \uacf5\uc2dd\uc801 \"soname\"\uc5d0\ub294 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uac00 \uc18d\ud55c \ub514\ub809\ud1a0\ub9ac\uba85\uc774 \uc55e\ubd80\ubd84\uc5d0 \ub4e4\uc5b4\uac04\ub2e4. \uc6b4\uc6a9\uc911\uc778 \uc2dc\uc2a4\ud15c\uc5d0\uc11c\ub294 \uc644\uc804 \ud55c \uacf5\uc2dd\uc801 \"soname\" \uc774\ub780 \uacf5\uc720\ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc758 \uc2e4\uc81c \uc774\ub984(\"real name\")\uc5d0 \ub300\ud55c \uc2ec\ubcfc\ub9ad \ub9c1\ud06c(\uc2e4\uc81c \ucf54\ub4dc\ub97c \ub2f4\uace0\uc788\ub294 \ud30c\uc77c\uc774 \uc544\ub2cc)\uac00 \ub420 \uac83\uc774\ub2e4. <\/FONT>\n

\ubaa8\ub4e0 \uacf5\uc720 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub294 \uc2e4\uc81c \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN> \ucf54\ub4dc\uac00 \uc800\uc7a5\ub418\uc5b4 \uc788\ub294 \ud30c\uc77c\uc758 \ud30c\uc77c \uba85\uc778 \"real name\"\uc744 \ub610\ud55c \uac00\uc9c4\ub2e4. \uc2e4\uc81c \ud30c\uc77c\uba85\uc740 \"soname\"\uc5d0 \ub9c8\uce68\ud45c\uc640 \ub9c8\uc774\ub108 \ubc84\uc804 \ub118\ubc84, \ub9c8\uce68\ud45c \uadf8\ub9ac\uace0 \ub9b4\ub9ac\uc988 \ub118\ubc84\ub97c \ub354\ud55c \uac83\uc774\ub2e4. \ub9b4\ub9ac\uc988 \ub118\ubc84\ub294 \uc120\ud0dd\uc0ac \ud56d\uc774\ub2e4. \ub9c8\uc774\ub108 \ub118\ubc84\uc640 \ub9b4\ub9ac\uc988 \ub118\ubc84\ub85c \uc815\ud655\ud788 \uc5b4\ub5a4 \ubc84\uc804\uc758 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uac00 \uc124\uce58 \ub418\uc5b4 \uc788\ub294\uc9c0 \uc54c\uac8c \ud568\uc73c\ub85c\uc368 \uc2dc\uc2a4\ud15c \uad6c\uc131\uc744 \uc870\uc808\ud560\uc218 \uc788\ub2e4. \uc774 \ubc88\ud638\ub4e4\uc740 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \uae30\uc220\ud558\uae30\uc704\ud55c \ubb38\uc11c\ud654\uc2dc\uc5d0 \uc0ac\uc6a9\ub41c \ubc88\ud638\uc640 \ub9de\uc9c0 \uc54a\uc744\uc218\ub3c4 \uc788\uc74c\uc5d0 \uc720\uc758\ud558 \ub77c. \uc774\ub807\uac8c \ud568\uc73c\ub85c\uc368 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc758 \ubb38\uc11c\ud654\uac00 \ub354 \uc6a9\uc774\ud574\uc9c4\ub2e4. <\/FONT>\n

\ubd80\uac00\uc801\uc73c\ub85c \ucef4\ud30c\uc77c\ub7ec\uac00 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \uc694\uad6c\ud560 \ub54c \uc0ac\uc6a9\ud558\ub294 \uc774\ub984\uc774 \ud558\ub098 \ub354 \uc874 \uc7ac\ud55c\ub2e4.(\ub098\ub294 \uc774\ub97c \"linker name\"\uc774\ub77c \uc77c\uceec\uc744 \uac83\uc774\ub2e4.) \uc5ec\uae30\uc5d0\ub294 \uc5b4\ub5a0\ud55c \ubc84\uc804\ub118 \ubc84\ub3c4 \ud3ec\ud568\ub418\uc9c0 \uc54a\ub294 \"soname\"\uc774 \ud574\ub2f9\ub41c\ub2e4. \uacf5\uc720 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \uad00\ub9ac\ud558\ub294 \ud575\uc2ec\uc740 \uc774\ub7ec\ud55c \uc774\ub984\ub4e4\uc744 \uc798 \ubd84\ubcc4\ud558\ub294 \uac83\uc774\ub2e4. \ud504 \ub85c\uadf8\ub7a8\uc5d0\uc11c \ud544\uc694\ud55c \uacf5\uc720 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \ub0b4\ubd80\uc801\uc73c\ub85c \ud45c\ud604\ud560\ub54c\ub294 \uadf8 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN> \uc758 \"soname\"\uc744 \uc368\uc57c\ud55c\ub2e4. \ubc18\ub300\ub85c \ub9cc\uc57d\uc5d0 \ub2f9\uc2e0\uc774 \uacf5\uc720 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \ub9cc\ub4e4\uc5c8\ub2e4 \uba74 \uc790\uc138\ud55c \ubc84\uc804 \uc815\ubcf4\ub97c \ud3ec\ud568\ud55c \uc2e4\uc81c \ud30c\uc77c\uba85\uc744 \uc8fc\uc5b4\uc57c \ud55c\ub2e4. \ub2f9\uc2e0\uc774 \uc0c8\ub85c\uc6b4 \ubc84 \uc804\uc758 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \uc124\uce58\ud560\ub54c\ub294 \uba87 \uac1c\uc758 \uc815\ud574\uc9c4 \ub514\ub809\ud1a0\ub9ac\ub4e4\uc911\uc758 \ud55c\uacf3\uc5d0 \uc124\uce58\ud55c \ub4a4\uc5d0 ldconfig\ub77c\ub294 \ud504\ub85c\uadf8\ub7a8\uc744 \uc2e4\ud589\ud558\uc5ec\uc57c \ud55c\ub2e4. ldconfig\ub294 \ub514\ub809\ud1a0\ub9ac\uc5d0 \uc874\uc7ac\ud558 \ub294 \ud30c\uc77c\ub4e4\uc744 \uc810\uac80\ud55c \ub4a4 \uc2e4\uc81c \ud30c\uc77c\uba85\uc758 \uc2ec\ubcfc\ub9ad \ub9c1\ud06c\ub85c\uc368 soname\uc744 \uc0dd\uc131<\/SPAN>\ud558\uba70 \ub3d9\uc2dc\uc5d0 \uce90\uc26c \ud30c\uc77c\uc778 \/etc\/ld.so.cache\ub97c \uc14b\ud305\ud55c\ub2e4. <\/FONT>\n

ldconfig\ub294 linker name\uc744 \uc14b\ud305\ud558\uc9c0 \uc54a\ub294\ub2e4. \uc774\uac83\uc740 \ubcf4\ud1b5 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc758 \uc124\uce58 \uc2dc\uc5d0 \uc14b\ud305\uc744 \ud558\ub294\ub370, \uac04\ub2e8\ud558\uac8c \uac00\uc7a5 \ucd5c\uadfc\uc758 soname\uc774\ub098 real name\uc5d0 \uc2ec\ubcfc\ub9ad \ub9c1\ud06c\ub97c \ub9cc\ub4e4\uba74 \ub41c\ub2e4. \ub300\ubd80\ubd84\uc758 \uacbd\uc6b0 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \uac31\uc2e0\ud558\uace0 \uc790\ub3d9\uc801<\/SPAN>\uc73c\ub85c \ub9c1\ud06c\uc2dc \uc5d0 \uc0ac\uc6a9\ud558\uae30\ub97c \uc6d0\ud560\uac83\uc774\ubbc0\ub85c soname\uc5d0 \uc2ec\ubcfc\ub9ad \ub9c1\ud06c\ud558\uae30\ub97c \uad8c\uc7a5\ud55c\ub2e4. H. J. Lu \uc5d0\uac8c ldconfig\uac00 \uc65c \uc790\ub3d9\uc73c\ub85c linker name\uc744 \uc14b\ud305\ud558\uc9c0 \uc54a\ub290\ub0d0\uace0 \ubb3c\uc5c8\ub354\ub2c8 \uadf8 \uc758 \uc124\uba85\uc740 \uac00\uc7a5 \ucd5c\uadfc\uc758 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub85c \ub9c1\ud06c\uc2dc\ud0a4\uace0 \uc2f6\uc744\ub54c\uac00 \uc788\uc744\uac83\uc774\uba70 \ub610\ud55c \uc774\uc804 \ubc84\uc804\uc758 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \uac1c\ubc1c\ud558\uac70\ub098\ud560 \ub54c \uadf8\uac83\uc744 \ub9c1\ud06c\ud558\ub824 \ud560 \ub54c\uac00 \uc788\uc73c\ubbc0 \ub85c ldconfig\ub294 \uc5ec\ub7ec\ubd84\uc774 \uc5b4\ub5a4 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc640 \ub9c1\ud06c\ud558\uace0 \uc2f6\uc740\uc9c0 \uac00\uc815\ud558\uc9c0 \uc54a\ub294 \uac83\uc774\uba70 \uadf8\ub798\uc11c \uc124\uce58\uc790\ub294 \uc5b4\ub5a4 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uac00 \ub9c1\ud06c\ub420\uac83\uc778\uc9c0\ub97c \uba85\uc2dc\ud574\uc57c \ud558\ub294\uac83 \uc774\ub77c \ud588\ub2e4. <\/FONT>\n

\uc774\uc0c1\uc758 \uc598\uae30\ub97c \uc885\ud569\ud55c \uc608\ub97c \ub4e4\uc5b4\ubcf4\uba74 ldconfig\uac00 \/usr\/lib\/libreadline.so.3.0\uacfc \uac19\uc740 real name\uc758 \uc2ec\ubcfc\ub9ad \ub9c1\ud06c\ub85c \uc14b\ud305\ud55c \/usr\/lib\/libreadline.so.3 \ud615\ud0dc\uc758 \uc644 \uc804\ud55c \uacf5\uc2dd\uc801 soname\uc774 \uc788\uc744\uac83\uc774\uba70 \/usr\/lib\/libreadline.so.3\uc5d0 \uc2ec\ubcfc\ub9ad \ub9c1\ud06c\ub41c link name\uc73c\ub85c\uc368 \/usr\/lib\/libreadline.so\uac00 \ub610\ud55c \uc788\uc744 \uac83\uc774\ub2e4. <\/FONT><\/P>\n

\ud30c\uc77c \uc2dc\uc2a4\ud15c\uc0c1\uc758 \uc704\uce58<\/B> <\/FONT>\n
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\uacf5\uc720 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub294 \ud30c\uc77c \uc2dc\uc2a4\ud15c \uc0c1\uc758 \ud2b9\uc815\uc704\uce58\uc5d0 \uc874\uc7ac\ud574\uc57c\ud55c\ub2e4. \uc624\ud508 \uc18c\uc2a4 \uc18c \ud504\ud2b8\uc6e8\uc5b4\ub4e4\uc740 GNU\uc758 \ud45c\uc900\uc744 \ub530\ub974\ub294 \uacbd\ud5a5\uc774 \uc788\uc73c\uba70 \ub354 \uc790\uc138\ud55c \ub0b4\uc6a9\uc740 info\ubb38 \uc11c\uc758 [13]info:standar<\/SPAN>ds#Directory_Var<\/SPAN>iables \ubd80\ubd84\uc744 \uc0b4\ud3b4\ubcf4\uae38 \ubc14\ub780\ub2e4. GNU \ud45c \uc900\uc740 \uc18c\uc2a4\ucf54\ub4dc\uc758 \ubc30\ud3ec\uc2dc\uc5d0 \ubaa8\ub4e0 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \/usr\/local\/lib\uc5d0 \uc124\uce58\ud558\uae38 \uad8c \uc7a5\ud55c\ub2e4(\/usr\/local\/bin\uc5d0\ub294 \uba85\ub839\ub4e4\uc774 \ubaa8\uc784). GNU\ud45c\uc900\uc740 \ub610\ud55c \uc774\ub7ec\ud55c \ub514\ud3f4\ud2b8\ub4e4 \uc744 \ubb34\uc2dc\ud558\uac70\ub098 \uc124\uce58\ub8e8\ud2f4\uc744 \ud638\ucd9c\ud558\ub294 \uc808\ucc28 \ub4f1\uc5d0 \uad00\ud55c \uad00\ub840\ub4e4\uc744 \uc815\uc758\ud558\uace0 \uc788\ub2e4. \ud30c\uc77c\uc2dc\uc2a4\ud15c \uacc4\uce35\uc801 \uad6c\uc870\ud45c\uc900(FHS:File system Hierar<\/SPAN>chy Standar<\/SPAN>d) \ub610\ud55c \uc18c \uc2a4\ubc30\ud3ec\uc2dc\uc5d0 \uc5b4\ub5a4 \uc704\uce58\uc5d0 \ubb34\uc5c7\uc744 \ub450\uc5b4\uc57c \ud558\ub294\uc9c0\uc5d0 \ub300\ud574 \ub17c\ud558\uace0 \uc788\ub2e4.( <\/FONT>www.pathname.com\/fhs<\/FONT><\/A> \ub97c \ucc38\uc870\ud558\uae30 \ubc14\ub78c). FHS\uc5d0\uc11c\ub294 \ub300\ubd80\ubd84\uc758 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \/usr\/lib\uc5d0 \uc124\uce58\ud560 \uac83\uc744 \uad8c\uc7a5\ud55c\ub2e4, \uadf8\ub7ec\ub098 \uc2dc\uc2a4\ud15c \uc2dc\uc791\uc2dc \ud544\uc694\ud55c \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub294 \/lib\uc5d0 \ub610\ud55c, \ube44\uc2dc\uc2a4\ud15c \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub294 \/usr\/local\/lib\uc5d0 \uc124\uce58\ub418\uc5b4\uc57c \ud55c\ub2e4. <\/FONT>\n

\uc704\uc758 \ub450 \ud45c\uc900\uc774 \uc11c\ub85c \ubaa8\uc21c\ub418\ub294 \ub4ef \ubcf4\uc774\uc9c0\ub9cc \uc2e4\uc81c\ub85c \uadf8\ub807\uc9c0\ub294 \uc54a\ub2e4. GNU\uc758 \ud45c\uc900\uc740 \uc18c\uc2a4\ucf54\ub4dc\uc758 \uac1c\ubc1c\uc790\ub97c \uc704\ud55c \ub514\ud3f4\ud2b8\uac12\uc744 \uc81c\uc548\ud558\ub294 \uac83\uc774\uace0, FHS\ub294 \uc18c\uc2a4 \uc758 \ubc30\ud3ec\uc790(\uc2dc\uc2a4\ud15c\uc758 \ub514\ud3f4\ud2b8 \uc18c\uc2a4\ucf54\ub4dc\ub97c \uc120\ud0dd\uc801\uc73c\ub85c \uadf8 \uc2dc\uc2a4\ud15c\uc758 \ud328\ud0a4\uc9c0 \uad00\ub9ac \ub3c4\uad6c\ub97c \ud1b5\ud574\uc11c \ub300\uce58\uc2dc\ud0a4\ub294)\ub97c \uc704\ud55c \ub514\ud3f4\ud2b8\uac12\uc744 \uc81c\uc548\ud558\ub294 \uac83\uc774\ub2e4. \uc2e4\uc81c\ub85c \uc774\uac83 \uc740 \uc0c1\ub2f9\ud788 \ud6a8\uacfc\uc801\uc778 \uac83\uc774\ub2e4, \uc989, \ub2f9\uc2e0\uc774 \ub2e4\uc6b4\ub85c\ub4dc\ud55c \uac00\uc7a5 \ucd5c\uc2e0\uc758(\ubc84\uadf8\uc758 \uac00\ub2a5 \uc131\uc774 \uc788\ub294) \uc18c\uc2a4\ucf54\ub4dc\ub294 \uc790\ub3d9\uc801<\/SPAN>\uc73c\ub85c \ub85c\uceec \ub514\ub809\ud1a0\ub9ac\uc778 \/usr\/local\uc5d0 \uc124\uce58\ub420\uac83\uc774\uba70 \uadf8 \ucf54\ub4dc\uac00 \uc774\uc81c \uc644\ubcbd\ud574\uc9c0\uba74 \ud328\ud0a4\uc9c0 \ub9e4\ub2c8\uc800\ub97c \uc774\uc6a9\ud558\uc5ec \uc2dc\uc2a4\ud15c\uc5d0 \uc124\uce58\ub41c \ub514 \ud3f4\ud2b8(\ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>)\ub97c \ub300\uce58\ud558\uace0 \ubc30\ud3ec\uc2dc\uc758 \ud45c\uc900 \ub514\ub809\ud1a0\ub9ac\ub85c \uc124\uce58\ud560\uc218 \uc788\ub294 \uac83\uc774 \ub2e4. \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \ud1b5\ud574\uc11c\ub9cc \ud638\ucd9c\uac00\ub2a5\ud55c \ud504\ub85c\uadf8\ub7a8\ub4e4\uc744 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uac00 \ud638\ucd9c\ud558\ub294 \uacbd\uc6b0\uc5d0\ub294 \ubc18\ub4dc\uc2dc \uadf8 \ud504\ub85c\uadf8\ub7a8\ub4e4\uc744 usr\/local\/libexec(\ubc30\ud3ec\ubcf8\uc5d0\uc11c\ub294 \/usr\/libexec \uc784)\uc5d0 \ub450\uc5b4\uc57c\ud568\uc744 \uba85\uc2ec\ud558\ub77c. \ud55c\uac00\uc9c0 \ud63c\ub3d9\uc740 \ub808\ub4dc\ud587\uc758 \ubc30\ud3ec\ubcf8\ub4e4\uc740 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \ucc3e\ub294 \uacfc\uc815\uc5d0\uc11c \/usr\/local \ub514\ub809\ud1a0\ub9ac\ub97c \uc81c\uc678 \uc2dc\ud0a8\ub2e4\ub294 \uac83\uc778\ub370, \uc544\ub798\uc5d0\uc11c \ub17c\uc758 \ub420 \/etc\/so.conf\ubd80\ubd84\uc744 \ucc38\uace0\ud558\uae38 \ubc14\ub780\ub2e4. \uadf8\uc678\uc5d0 \ub610\ub2e4\ub978 \ud558\ub098\uc758 \ud45c\uc900 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN> \ub514\ub809\ud1a0\ub9ac\uac00 \uc788\ub294\ub370 X-\uc708\ub3c4\uc6b0 \uc2dc\uc2a4\ud15c\uc774 \uc0ac\uc6a9\ud558\ub294 \/usr\/X11R6\/lib\uc774 \uadf8 \uac83\uc774\ub2e4. \/lib\/security \ub514\ub809\ud1a0\ub9ac\ub294 PAM\ubaa8\ub4c8\uc5d0\uc11c \uc0ac\uc6a9\ub428\uc5d0 \uc720\uc758\ud558\ub77c. \uc774 \ub514\ub809 \ud1a0\ub9ac\ub294 \ud1b5\uc0c1 \ub3d9\uc801<\/SPAN> \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub85c\uc368 \uc801\uc7ac\ub41c\ub2e4.(\uc5ed\uc2dc \ub4b7\ubd80\ubd84\uc5d0\uc11c \ub17c\uc758\ub420\uac83\uc784) <\/FONT>\n

<\/P>\n

\ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub294 \uc5b4\ub5bb\uac8c \uc0ac\uc6a9\ub418\ub294\uac00<\/B> <\/FONT>\n
\n

\ubaa8\ub4e0 \ub9ac\ub205\uc2a4 \uc2dc\uc2a4\ud15c\uc774 \ud3ec\ud568\ub418\ub294 GNU\uc758 glibc-\uae30\ubc18\uc758 \uc2dc\uc2a4\ud15c\uc740 ELF \uc774\uc9c4 \uc2e4 \ud589 \ud504\ub85c\uadf8\ub7a8\uc758 \uc2dc\uc791\uc2dc\uc5d0 \uc790\ub3d9\uc801<\/SPAN>\uc73c\ub85c \ud504\ub85c\uadf8\ub7a8 \ub85c\ub354\ub97c \uc801\uc7ac\ud558\uace0 \uc2e4\ud589\uc2dc\ud0a8\ub2e4. \ub9ac\ub205\uc2a4 \uc2dc\uc2a4\ud15c\uc5d0\uc11c \uc774 \ub85c\ub354\ub294 \/lib\/ld-linux.so.X(X\ub294 \ubc84\uc804 \ub118\ubc84\uc784)\uc774\ub77c \ubd88\ub9ac\uc6cc \uc9c0\uba70 \ud504\ub85c\uadf8\ub7a8\uc5d0\uc11c \uc0ac\uc6a9\ub418\ub294 \ubaa8\ub4e0 \uacf5\uc720 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \ucc28\ub840\ub300\ub85c \ucc3e\uc544\uc11c \uc801\uc7ac\uc2dc \ud0a8\ub2e4. <\/FONT>\n

\ud0d0\uc0c9\ub418\uc5b4\uc9c8 \ub514\ub809\ud1a0\ub9ac\uc758 \ubaa9\ucc28\ub294 \/etc\/ld.so.conf\uc5d0 \ub4e4\uc5b4 \uc788\ub2e4. \ub808\ub4dc\ud587\uc5d0 \uae30\ubc18\ud55c \ubc30\ud3ec\ubcf8\uc5d0\ub294 \uc77c\ubc18\uc801\uc73c\ub85c \/usr\/local\/lib\uac00 \/etc\/ld.so.conf\ud30c\uc77c\uc5d0 \ub4e4\uc5b4 \uc788\uc9c0\uc54a\uc740\ub370 \uc800\uc790\uac00 \uc0dd\uac01\ud558\uae30\ub85c \uc774\uac83\uc740 \uc77c\uc885\uc758 \ubc84\uadf8\uac00 \uc544\ub2cc\uac00 \uc0dd\uac01\ud55c\ub2e4. \ub808\ub4dc\ud587\uc758 \uacbd\uc6b0 \/usr\/local\/lib\uc744 \/etc\/ld.so.conf\uc5d0 \ucca8\uac00\ud558\ub294 \uac83\uc740 \ub9ce\uc740 \ud504\ub85c\uadf8\ub7a8\ub4e4\uc744 \uc218\ud589\uc2dc\ud0a4 \uae30\uc704\ud574 \ud754\ud788 \uc788\ub294 \uc218\uc815\uc791\uc5c5\uc774\ub2e4. <\/FONT>\n

\ub9cc\uc57d \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub0b4\uc758 \ud2b9\uc815\ud55c \ud568\uc218\ub9cc\uc744 \ub300\uce58\uc2dc\ud0a4\uace0 \ub098\uba38\uc9c0\ub294 \uadf8\ub300\ub85c \uc720\uc9c0\ud558\ub824 \ud560\ub54c\ub294 \ub300\uce58\uc2dc\ud0ac \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>(.o\ud30c\uc77c\ub4e4)\ub4e4\uc744 \/etc\/ld.so.preload \ud30c\uc77c\uc5d0 \uba85\uc2dc\ud558\uba74 \ub418\ub294\ub370 \uc774\ub7ec\ud55c \ud504\ub9ac\ub85c\ub4dc \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub4e4\uc740 \ud45c\uc900\uc801\uc778 \ud568\uc218\ubcf4\ub2e4 \uc6b0\uc120\uad8c\uc744 \uac00\uc9c0\uac8c \ub41c\ub2e4. \uc774\ub7ec\ud55c \ud504\ub9ac\ub85c\ub529 \ud30c\uc77c\ub4e4\uc740 \ubcf4\ud1b5 \uc751\uae09 \ud328\uce58\ubcf8\uc5d0\uc11c \uc0ac\uc6a9\ub418\ub294\ub370 \uc815\uc0c1\uc801 \ubc30\ud3ec\ubcf8\uc5d0\ub294 \uc798 \ud3ec\ud568\ub418\uc9c0 \uc54a\ub294\ub2e4. <\/FONT>\n

\ub9e4 \ud504\ub85c\uadf8\ub7a8\uc758 \uc2dc\uc791\uc2dc\ub9c8\ub2e4 \uc774 \ubaa8\ub4e0 \ub514\ub809\ud1a0\ub9ac\ub4e4\uc744 \ud0d0\uc0c9\ud558\ub294 \uac83\uc740 \uc804\ubc18\uc801\uc73c\ub85c \ub9e4\uc6b0 \ube44\ud6a8\uc728\uc801\uc774\uae30 \ub54c\ubb38\uc5d0 \uc2e4\uc81c\uc801\uc73c\ub85c\ub294 \uce90\uc26c\uac00 \uc0ac\uc6a9\ub41c\ub2e4. ldconfig \ud504\ub85c \uadf8\ub7a8\uc740 \ud1b5\uc0c1 \/etc\/ld.so.conf\ub97c \uc77d\uc5b4\uc11c \ubaa8\ub4e0 \ud544\uc694\ud55c \ub3d9\uc801<\/SPAN> \ub9c1\ud06c \ub514\ub809\ud1a0\ub9ac\ub4e4\ub85c\ubd80 \ud130 \uc801\ub2f9\ud55c \uc2ec\ubcfc\ub9ad \ub9c1\ud06c\ub97c \uc0dd\uc131<\/SPAN>\ud55c\ub2e4.(\uadf8\ub798\uc11c \uc774\ub984 \uc0ac\uc6a9\uc758 \uaddc\uce59\uc744 \uc798 \ub530\ub77c\uc57c \ud55c\ub2e4) \uadf8 \ub2e4\uc74c\uc73c\ub85c \/etc\/ld.so.cache \uc5d0 \uc774 \ub0b4\uc6a9\ub4e4\uc744 \uae30\ub85d\ud558\uba70 \uc774 \ub2e4\uc74c \ubd80\ud130 \ub294 \ud504\ub85c\uadf8\ub7a8\ub4e4\uc774 \uc774 \ud30c\uc77c\uc744 \uc774\uc6a9\ud558\ub294 \uac83\uc774\ub2e4. \uc774\ub807\uac8c \ud574\uc11c \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc758 \uc561\uc138 \uc2a4 \uc18d\ub3c4\ub294 \uc0c1\ub2f9\ud788 \ud5a5\uc0c1\ub418\ub294 \uac83\uc774\ub2e4. \uc704\uc758 \ub0b4\uc6a9\uc774 \ud568\ucd95\ud558\ub294 \ubc14\ub294 DLL\uc774 \ucd94\uac00 \ub610\ub294 \uc81c\uac70\ub420 \ub54c, \ub610\ub294 DLL\uc758 \ub514\ub809\ud1a0\ub9ac\uac00 \ubcc0\uacbd\ub420\ub54c\ub294 \ubc18\ub4dc\uc2dc ldconfig\uac00 \uc2e4\ud589\ub418\uc5b4\uc57c \ud55c\ub2e4\ub294 \uac83\uc774\uba70, \uadf8\ub798\uc11c \ud328\ud0a4\uc9c0 \ub9e4\ub2c8\uc800\uac00 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \uc124\uce58\ud560 \ub54c, \uc774 \uacfc\uc815\uc740 \ud1b5\uc0c1\uc73c\ub85c \uc218\ud589\ub418\ub294 \uc808\ucc28\uc778 \uac83\uc774\ub2e4. \uadf8\ub798\uc11c \ud504\ub85c\uadf8\ub7a8 \uc2dc \uc791\uc2dc \ub3d9\uc801<\/SPAN> \ub85c\ub354\ub294 \uc2e4\uc81c\ub85c\ub294 \/etc\/ld.so.cache\ub97c \uc0ac\uc6a9\ud558\uc5ec \ud544\uc694\ud55c \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \uc801\uc7ac\ud558\ub294 \uac83\uc774\ub2e4. <\/FONT>\n

<\/P>\n

\ud658\uacbd \ubcc0\uc218<\/B> <\/FONT>\n
\n

\uc5ec\ub7ec \uc885\ub958\uc758 \ud658\uacbd\ubcc0\uc218\ub4e4\uc774 \uc704\uc758 \uc774\ub7ec\ud55c \ud504\ub85c\uadf8\ub7a8 \uc2dc\uc791\uc2dc\uc758 \uc801\uc7ac\uacfc\uc815\ub4e4\uc744 \uc870 \uc808\ud560\uc218 \uc788\uc73c\uba70 \ub610\ud55c \uc774 \uacfc\uc815\ub4e4\uc744 \ub300\uce58\ud558\ub3c4\ub85d \ud558\ub294 \ud658\uacbd\ubcc0\uc218\ub4e4\ub3c4 \uc788\ub2e4. \uc608\ub97c \ub4e4 \uba74 \uc774 \uc218\ud589\uacfc\uc815\uc911, \uc5b4\ub5a4 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \uc7a0\uc815\uc801\uc73c\ub85c \uad50\uccb4\ud558\uc5ec \uc218\ud589\ud560\uc218\ub3c4 \uc788\ub2e4. \ub9ac\ub205\uc2a4\uc5d0\uc11c \ud658\uacbd\ubcc0\uc218 LD_LIBRAR<\/SPAN>Y_PATH\ub294 \ucf5c\ub860\uc73c\ub85c \ubd84\ub9ac\ub418\uc5b4 \uc788\ub294 \ud45c\uc900 \uc801\uc778 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc14b\uc5d0 \uc55e\uc11c\uc11c \uac00\uc7a5 \uba3c\uc800 \ud0d0\uc0c9\ub418\uc5b4\uc9c8 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN> \ub514\ub809\ud1a0\ub9ac\uc9d1\ud569 \uc774\ub2e4. \uc774\ub807\uac8c \ud558\uba74 \uc0c8\ub85c\uc6b4 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \ub514\ubc84\uae45\ud558\uac70\ub098 \ube44\ud45c\uc900\uc801\uc778 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN> \ub97c \uc5b4\ub5a4 \ud2b9\uc218\ud55c \uc6a9\ub3c4\ub85c \uc0ac\uc6a9\ud560 \ub54c\uc5d0 \uc720\uc6a9\ud560\uac83\uc774\ub2e4. \ud658\uacbd\ubcc0\uc218 LD_PRELOAD \ub294 \/etc\/ld.so. preload\ucc98\ub7fc \ud45c\uc900\uc801\uc778 \ud568\uc218\ub4e4\uc5d0 \uc624\ubc84\ub77c\uc774\ub4dc\ub420 \ud568\uc218\ub4e4\uc774 \uc788\ub294 \uc624 \ube0c\uc81d\ud2b8 \ud30c\uc77c\uc758 \ub9ac\uc2a4\ud2b8\ub97c \ub098\ud0c0\ub0b8\ub2e4. \uc704\uc758 \uc774\ub7ec\ud55c \uae30\ub2a5\ub4e4\uc740 \ub85c\ub354 \/lib\/ld-linux.so \uac00 \uad6c\ud604\ud55c\ub2e4. <\/FONT>\n

\uc801\uc7ac\uacfc\uc815\uc744 \uc81c\uc5b4\ud558\ub294 \ub2e4\ub978 \uc885\ub958\uc758 \ud658\uacbd\ubcc0\uc218\ub4e4\uc774 \uc788\ub2e4; \uc774\ub984\uc774 LD_ \ub610\ub294 RTLD_\ub85c \uc2dc\uc791\ud55c\ub2e4. \uc774\ub7ec\ud55c \ubcc0\uc218\ub4e4\uc758 \ub300\ubd80\ubd84\uc740 \uc801\uc7ac\uacfc\uc815\uc758 \uc800\uc218\uc900 \ub514\ubc84\uae45\uc774\ub098 \ud2b9\uc218\uae30\ub2a5\uc758 \uad6c\ud604\uc744 \uc704\ud574\uc11c \uc0ac\uc6a9\ub418\uc5b4 \uc9c4\ub2e4. \uc774\ub4e4 \ub300\ubd80\ubd84\uc774 \uc798 \ubb38\uc11c\ud654\ub418\uc9c0 \uc54a\uc558 \uae30 \ub54c\ubb38\uc5d0 \uc790\uc138\ud788 \uc54c\ub824\uba74 \uc18c\uc2a4\ucf54\ub4dc\ub97c \uc77d\uc5b4\ub098\uac00\ub294 \uac83\uc774 \ucd5c\uc120\uc758 \ubc29\ub3c4\uc77c \uac83\uc774\ub2e4. \uc774\ub807\uac8c \ub3d9\uc801<\/SPAN>\ub9c1\ud06c \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc5d0 \ub300\ud55c \uc81c\uc5b4\uad8c\uc744 \uc0ac\uc6a9\uc790\uc5d0\uac8c \ud5c8\ub77d\ud558\ub294 \uac83\uc740 \ud2b9 \ubcc4\ud55c \uc870\uce58\uac00 \ucde8\ud574\uc9c0\uc9c0 \uc54a\ub294\ub2e4\uba74 setuid\/setgid \ub4f1\uc758 \ud504\ub85c\uadf8\ub7a8\uc5d0 \uc788\uc5b4\uc11c\ub294 \ub300\ub2e8 \ud788 \uc704\ud5d8\ud55c \uac83\uc774\ub2e4. \uadf8\ub798\uc11c GNU\ub85c\ub354\uc758 \uacbd\uc6b0 \ub9cc\uc57d\uc5d0 \ud504\ub85c\uadf8\ub7a8\uc774 setuid \ub610\ub294 setgid\uc77c \uacbd\uc6b0\uc5d0\ub294 \uc774\ub7ec\ud55c \ud658\uacbd\ubcc0\uc218\ub4e4(\ub610\ub294 \uc774\uc640 \uc720\uc0ac\ud55c \ub2e4\ub978 \ubcc0\uc218\ub4e4)\uc740 \ubb34\uc2dc \ub418\uac70\ub098 \uc544\ub2c8\uba74 \ud560\uc218\uc788\ub294 \uae30\ub2a5\uc774 \ub300\ub2e8\ud788 \uc81c\ud55c\ub41c\ub2e4. \ub85c\ub354\ub294 \ud504\ub85c\uadf8\ub7a8\uc774 setuid \ub610\ub294 setgid\uc778\uc9c0 \uc810\uac80\ud558\uae30\uc704\ud574 \ud504\ub85c\uadf8\ub7a8\uc758 credential\ub97c \uccb4\ud06c\ud55c\ub2e4; uid\uc640 euid(effective user ID)\uac00 \ub2e4\ub974\uac70\ub098 gid\uc640 egid(effective group ID)\uac00 \ub2e4\ub978\uacbd \uc6b0\uc5d0 \ub85c\ub354\ub294 \uc774 \ud504\ub85c\uadf8\ub7a8\uc744 setuid\/setgid(\ub610\ub294 \uc0c1\uc18d\ubc1b\uc740\uac83)\uc774\ub77c \uac00\uc815\ud558\uace0 \ub9c1 \ud06c\uacfc\uc815\uc758 \uc81c\uc5b4\uae30\ub2a5\uc744 \ub300\ub2e8\ud788 \uc81c\ud55c\ud558\uac8c \ub41c\ub2e4. GNU\uc758 glibc\ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc758 \uc18c\uc2a4\ucf54 \ub4dc\ub97c \uc77d\uc5b4\ubcf4\uba74 \uc774\ub7ec\ud55c \ub0b4\uc6a9\uc744 \uc798 \ubcfc\uc218 \uc788\uc744\uac83\uc774\uba70 \ud2b9\ud788 elf\/rtld.c, sysdeps\/ generic\/dl-sysdep.c\ub97c \ubcf4\uae38 \ubc14\ub780\ub2e4. \uc774\uac83\uc774 \ub73b\ud558\ub294 \ubc14\ub294 \ub9cc\uc57d\uc5d0 \ub2f9\uc2e0\uc774 uid, gid\ub97c euid, egid\uc640 \uac19\uac8c\ud558\uace0 \ud504\ub85c\uadf8\ub7a8\uc744 \ud638\ucd9c\ud558\uba74 \uc774\ub7ec\ud55c \ud658\uacbd\ubcc0\uc218\ub4e4\uc740 \uc644\uc804 \ud55c \uc601\ud5a5\ub825\uc744 \ubbf8\uce60\uc218 \uc788\ub2e4\ub294 \ub73b\uc774\ub2e4. \ub2e4\ub978 \uc720\ub2c9\uc2a4 \uc720\uc0ac \uc2dc\uc2a4\ud15c\ub4e4\uc5d0\uc11c\ub294 \uc774\ub7ec\ud55c \uc0c1\ud669\uc744 \ub2e4\ub974\uac8c \ub2e4\ub8e8\uae30\ub3c4 \ud558\uc9c0\ub9cc \uac19\uc740 \uc774\uc720\ub85c \uc778\ud574\uc11c setuid\/setgid \ud504\ub85c\uadf8\ub7a8 \uc740 \ud658\uacbd\ubcc0\uc218\uc5d0 \uc758\ud574\uc11c \uc798\ubabb\ub41c \uc601\ud5a5\uc744 \ubc1b\uc544\uc11c\ub294 \uc54a\ub418\ub294 \uac83\uc774\ub2e4. <\/FONT>\n

<\/P>\n

\uacf5\uc720 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc758 \uc0dd\uc131<\/SPAN><\/B> <\/FONT>\n
\n

\uacf5\uc720 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc758 \uc0dd\uc131<\/SPAN>\uc740 \uc27d\ub2e4. \uba3c\uc800 gcc\uc758 fPIC\ud50c\ub798\uadf8(\"position inde- pendent code\" \uacf5\uc720\ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub85c \uc0ac\uc6a9\ud560 \ub54c \ud544\uc218)\ub97c \uc0ac\uc6a9\ud558\uc5ec \uc624\ube0c\uc81d\ud2b8 \ud30c\uc77c \uc744 \uc0dd\uc131<\/SPAN>\ud55c\ub2e4. \uadf8 \ub2e4\uc74c\uc5d4 \ub2e4\uc74c\uacfc \uac19\uc740 \uba85\ub839\ud615\ud0dc\ub85c \uacf5\uc720 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \uc0dd\uc131<\/SPAN>\ud55c\ub2e4. <\/FONT>

gcc -shar<\/SPAN>ed -WI, -soname, your_soname\\ -o librar<\/SPAN>y_name file_list librar<\/SPAN>y_list <\/FONT><\/PRE>\ub450 \uac1c\uc758 \uc624\ube0c\uc81d\ud504 \ud30c\uc77c(a.o, b.o)\uc744 \ud3ec\ud568\ud558\ub294 \ud558\ub098\uc758 \uacf5\uc720 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \uc0dd\uc131<\/SPAN> \ud558\ub294 \uc608\ub97c \ub4e4\uba74 \uc544\ub798\uc640 \uac19\ub2e4. \ucef4\ud30c\uc77c\uc2dc\uc5d0 \uacf5\uc720 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc5d0 \ud544\uc694\ud55c \uac83\uc740 \uc544\ub2c8 \uc9c0\ub9cc \uad8c\uace0\ub418\ub294 \uc0ac\ud56d\uc778 \ub514\ubc84\uae45 \uc815\ubcf4(-g\uc635\uc158)\uc640 \uacbd\uace0(- wall\uc635\uc158)\uc758 \uc0dd\uc131<\/SPAN>\uc5d0 \uc720\uc758 \ud558\ub77c, \uadf8\ub9ac\uace0 -c\uc635\uc158\uc73c\ub85c \uc624\ube0c\uc81d\ud2b8 \ud30c\uc77c\uc774 \uc0dd\uc131<\/SPAN>\ub418\uba70 \ubd84\uba85\ud788 -fPIC \uc635\uc158\uc774 \uc0ac \uc6a9\ub418\uace0 \uc788\ub2e4. <\/FONT>
gcc -fPIC -g -c -Wall a.c gcc -fPIC -g -c -Wall b.c gcc -shar<\/SPAN>ed -Wl, -soname, libmystuff.so.1 \\ -o libmystuff.so.1.0.1 a.o b.o -lc <\/FONT><\/PRE>\uc774\ub54c \uc8fc\uc758\uc0ac\ud56d \uba87\uac00\uc9c0\ub97c \uc801\uc5b4\ubcf4\uba70 \uc544\ub798\uc640 \uac19\ub2e4. <\/FONT>\n
* \ucef4\ud30c\uc77c \uacb0\uacfc \uc0dd\uc131<\/SPAN>\ub420 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \uba85\uae30\ud558\ub294 \uac83\uc744 \uc78a\uc9c0 \ub9d0\uac83\uc774\uba70 -fomit, -frame, -pointer \ub4f1\uc758 \ucef4\ud30c\uc77c\ub7ec \uc635\uc158\uc740 \uc9c4\uc9dc \ud544\uc694\ud560 \uacbd\uc6b0\uc678\uc5d4 \uc4f0\uc9c0 \ub9d0 \uac83. \uacb0\uacfc\uc801\uc73c\ub85c \uc0dd\uc131<\/SPAN>\ub41c \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub294 \ub3d9\uc791\ud558\uc9c0\ub9cc \uc774\ub807\uac8c \ud558\uba74 \ub514\ubc84\uac70\ub294 \ubb34\uc6a9\uc9c0\ubb3c \uc774 \ub41c\ub2e4. <\/FONT>\n
* -fpic\uac00 \uc544\ub2cc -fPIC\ub97c \uc0ac\uc6a9\ud558\uc5ec \ucf54\ub4dc\ub864 \uc0dd\uc131<\/SPAN>\uc2dc\ucf1c\uc57c \ud55c\ub2e4.(-fpic\ub97c \uc4f8 \uacbd\uc6b0 \ubd84 \uae30\uc810\uc5d0\uc11c \ud070 \uc704\uce58\ubcc0\ud654\uac00 \ud544\uc694\ud560\uacbd\uc6b0 \uc644\uc804\ud55c \uc704\uce58 \ub3c5\ub9bd\ud615 \ucf54\ub4dc\ub97c \uc5bb\uc744\uc218 \uc5c6\ub2e4.) <\/FONT>\n
<\/P>\n
\uacf5\uc720 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc758 \uc124\uce58 \ubc0f \uc0ac\uc6a9<\/B> <\/FONT>\n
\n
\uc774\uc81c \ub9cc\uc57d\uc5d0 \ub2f9\uc2e0\uc774 \ud558\ub098\uc758 \uacf5\uc720 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \ub9cc\ub4e4\uc5c8\ub2e4\uba74 \uadf8 \ub2e4\uc74c\uc73c\ub85c \uc124\uce58 \ub97c \uc6d0\ud560 \uac83\uc774\ub2e4. \uac00\uc7a5 \uac04\ub2e8\ud55c \ubc29\ubc95\uc740 \ub9cc\ub4e4\uc5b4\uc9c4 \uacf5\uc720 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \ud45c\uc900 \ub514\ub809\ud1a0 \ub9ac\ub4e4\uc911\uc758 \ud558\ub098(\uc608\ub97c \ub4e4\uba74 \/usr\/lib)\uc5d0 \ubcf5\uc0ac\ud558\uace0 ldconfig(8)\ub97c \uc2e4\ud589\uc2dc\ud0a4\ub294 \uac83\uc774 \ub2e4. <\/FONT>\n
\ub9cc\uc57d\uc5d0 (\/usr\/lib \ub514\ub809\ud1a0\ub9ac\uc758 \ubcc0\uacbd\uad8c\uc744 \uac00\uc9c0\uc9c0 \ubabb\ud558\uac70\ub098 \ud574\uc11c) \uc704\ucc98\ub7fc \ud560\uc218 \uc5c6 \ub294 \uacbd\uc6b0\uac00 \uc788\ub2e4\uba74 \ud658\uacbd\ubcc0\uc218\ub97c \uc0ac\uc6a9\ud558\uc5ec \uc870\uc815\ud560\uc218 \uc788\ub2e4. \uba3c\uc800 \uc5b4\ub518\uac00\uc5d0 \uacf5\uc720 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \uc0dd\uc131<\/SPAN>\ud574\uc57c\ud55c\ub2e4. \uadf8 \ub2e4\uc74c\uc5d0 \ud544\uc694\ud55c \uac83\uc740 real name\uc5d0 \uad00\ud55c \uc2ec\ubcfc\ub9ad \ub9c1\ud06c\ub85c\uc368 soname\uc744 \uc0dd\uc131<\/SPAN>(\ub610\ub294 \ubc84\uc804\uba85\uc744 \uc804\ud600 \uba85\uc2dc\ud558\uc9c0 \uc54a\ub294 \uc0ac\uc6a9\uc790\uc744 \uc704\ud55c \ubc84\uc804\uba85\uc774 \ud3ec\ud568\ub418\uc9c0 \uc54a\uc740 soname\uc744 \uc2ec\ubcfc\ub9ad \ub9c1\ud06c\ub85c \uc0dd\uc131<\/SPAN>)\ud558\ub294 \uac83\uc778\ub370 \uc774\ub97c \uc704 \ud55c \uac00\uc7a5 \uac04\ub2e8\ud55c \ubc29\ubc95\uc740 \ub2e4\uc74c\uacfc \uac19\uc774 ldconfig\ub97c \uc2e4\ud589\ud558\ub294 \uac83\uc774\ub2e4. <\/FONT>\n
ldconfig -n directory_with_shar<\/SPAN>ed_librar<\/SPAN>y<\/B> <\/FONT>\n
\uadf8 \ub2e4\uc74c\uc73c\ub85c \ud45c\uc900 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN> \ubcf4\ub2e4 \uc55e\uc11c\uc11c \ud0d0\uc0c9\ub420 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN> \ub514\ub809\ud1a0\ub9ac \ubaa9\ub85d \uc778 LD_LIBRAR<\/SPAN>Y_PATH \ubcc0\uc218\ub97c \uc124\uc815\ud55c\ub2e4. \ub9cc\uc57d\uc5d0 bash\ub77c\uba74 \ub2e4\uc74c\uacfc \uac19\uc774 \ud558 \uc5ec my_program\uc744 \ud3ec\ud568\ub418\uac8c \ud560\uc218 \uc788\ub2e4. <\/FONT>\n
LD_LIBRAR<\/SPAN>Y_PATH=.:$LD_LIBRAR<\/SPAN>Y_PATH my_program <\/FONT>\n
\ub9cc\uc57d \ud2b9\uc815\ud55c \ud568\uc218\ub9cc\uc744 \uc624\ubc84\ub77c\uc774\ub4dc \ud558\ub824\uba74 \uc624\ubc84\ub77c\uc774\ub529 \uc624\ube0c\uc81d\ud2b8 \ud30c\uc77c\uc744 \uc0dd\uc131<\/SPAN> \ud55c \ub4a4\uc5d0 LD_PRELOAD\ub97c \uc124\uc815\ud574\uc11c \ud560\uc218 \uc788\ub2e4. \uc989, \uc774 \ud30c\uc77c\uc5d0 \uc788\ub294 \ud568\uc218\ub4e4\uc774 \uae30\uc874 \ud568\uc218\ub97c \uc624\ubc84\ub77c\uc774\ub4dc\ud55c\ub2e4. <\/FONT>\n
\uc77c\ubc18\uc801\uc73c\ub85c \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \uac31\uc2e0\ud558\ub294\ub370 \uc788\uc5b4 \ud2b9\ubcc4\ud55c \uace0\ub824\uc0ac\ud56d\uc740 \uc5c6\ub2e4. \ub9cc\uc57d API\uac00 \ubcc0\ud654\ud55c\ub2e4\uba74 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc758 \uc81c\uc791\uc790\ub294 soname\uc744 \ubcc0\uacbd\ud560 \uac83\uc774\ub2e4. \uac19\uc740 soname\uc744 \uac00\uc9c0\uba74\uc11c \ub0b4\uc6a9\uc740 \uac31\uc2e0\ub41c \uc2e0\ubc84\uc804\uc758 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \ubb34\uc2dc\ud558\uace0 \uad6c\ubc84\uc804\uc758 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \uc0ac\uc6a9\ud558\ub824\uba74, \uad6c\ubc84\uc804\uc758 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \uc5b4\ub518\uac00\uc5d0 \ubcf5\uc0ac\ud558\uace0 \uadf8\uac83\uc758 \uc774\ub984\uc744 \ubcc0\uacbd(\uc774\ub97c\ud14c\uba74 \uc61b\ub0a0\uc774\ub984.orig\ub4f1)\ud55c \ub4a4 \uc774 \uc774\ub984 \ubcc0\uacbd\ub41c \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \uc2e4 \uc81c\ub85c \ud638\ucd9c\ud558\uc5ec \uc0ac\uc6a9\ud558\ub3c4\ub85d \uc7ac\uc124\uc815\ud558\ub294 \uc791\uc740 wrap\uc2a4\ud06c\ub9bd\ud2b8\ub97c \uc791\uc131\ud558\uc5ec \uac15\uc81c\uc801 \uc73c\ub85c \uad6c\ubc84\uc804\uc744 \uc0ac\uc6a9\ud558\uac8c \ud560\uc218\uc788\ub2e4. \uad00\ub840\uc0c1 \uc5ec\ub7ec\ubc84\uc804\uc758 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub4e4\uc774 \uac19\uc740 \ub514 \ub809\ud1a0\ub9ac\uc5d0 \uc788\uc744\uc218 \uc788\uc9c0\ub9cc \uc774 \uad6c\ubc84\uc804\uc758 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \ub530\ub85c \ud2b9\uc815\ud55c \ub514\ub809\ud1a0\ub9ac\uc5d0 \uc704\uce58\uc2dc\ud0ac\uc218\ub3c4 \uc788\ub2e4. wrap \uc2a4\ud06c\u3139\ud2b8\ub294 \uc544\ub9c8 \uc544\ub798\uc640 \uac19\uc744 \uac83\uc774\ub2e4. <\/FONT>
#!\/bin\/sh export LD_LIBRAR<\/SPAN>Y_PATH=\/usr\/local\/my_lib:$LD_LIBRAR<\/SPAN>Y_PATH exec \/usr\/bin\/my_program.orig $* <\/FONT><\/PRE>\ud55c \ud504\ub85c\uadf8\ub7a8\uc774 \uc0ac\uc6a9\ud558\ub294 \uacf5\uc720 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc758 \ubaa9\ub85d\uc740 ldd(1)\ub97c \uc368\uc11c \uc54c \uc218 \uc788 \ub2e4. \uadf8\ub798\uc11c, \uc608\ub97c \ub4e4\uba74 ls\uba85\ub839\uc774 \uc0ac\uc6a9\ud558\ub294 \uacf5\uc720 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc758 \ubaa9\ub85d\uc740 \ub2e4\uc74c\uc758 \uc608 \uc640 \uac19\uc774 \uc54c\uc218\uc788\ub2e4 <\/FONT>\n
ldd \/bin\/ls <\/FONT>\n
\ubcf4\ud1b5 \ud504\ub85c\uadf8\ub7a8\uc5d0\uc11c \uc758\uc874\ud558\uace0 \uc788\ub294 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc758 soname\uc758 \ubaa9\ub85d\uacfc \ud3ec\ud568\ub41c \ub514 \ub809\ud1a0\ub9ac\uac00 \ubcf4\uc77c\uac83\uc774\ub2e4. \uc2e4\uc9c8\uc801\uc73c\ub85c \ub2e4\uc74c\uc758 \ub450 \ubaa8\ub4c8\uc758\uc874\uc131\uc740 \ud56d\uc0c1 \ubcf4\uc77c\uac83\uc778\ub370 \uadf8 \uac83\uc740 \uc544\ub798\uc640 \uac19\ub2e4. <\/FONT>\n
* \/lib\/ld-linux.so.N(N\uc740 1\uc774\uc0c1 \uc801\uc5b4\ub3c4 2). \uc774 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub294 \ub2e4\ub978 \ubaa8\ub4e0 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \uc801\uc7ac\ud55c\ub2e4. <\/FONT>\n
* libc.so.N(N\uc740 6\ub610\ub294 \uadf8\uc774\uc0c1). \uc774\uac83\uc740 C \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc774\ub2e4. \ub2e4\ub978 \ud504\ub85c\uadf8\ub798\ubc0d \uc5b8\uc5b4\ub4e4\uc5d0\uc11c\ub3c4(\uc801\uc5b4\ub3c4 \uadf8 \uc5b8\uc5b4\uc758 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \uad6c\ud604\ud558\uae30\uc704\ud574\uc11c) C \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN> \ub97c \uc4f0\ub294 \uacbd\ud5a5\uc774 \uc788\ub2e4. \uadf8\ub798\uc11c \ubaa8\ub4e0 \ud504\ub85c\uadf8\ub7a8\uc5d0\uc11c \uc801\uc5b4\ub3c4 \uc774 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub294 \ud3ec \ud568\ub420 \uac83\uc774\ub2e4. <\/FONT>\n
\uacbd\uace0: ldd\ub97c \uc2e0\ub8b0\ud560\uc218 \uc5c6\ub294 \ud504\ub85c\uadf8\ub7a8\uc5d0 \uc0ac\uc6a9\ud558\uc5ec\uc11c\ub294 \uc54a\ub41c\ub2e4. \uc774\ub294 ldd\uc758 \ub9e4\ub274 \uc5bc\uc5d0\ub3c4 \uba85\ubc31\ud788 \uc5b8\uae09\ub41c \uc598\uae30\uc774\ub2e4. ldd\ub294 \uc9c1\uc811 \uadf8 \ud504\ub85c\uadf8\ub7a8\uc744 \ud638\ucd9c\ud568\uc73c\ub85c\uc368 \uc218\ud589 \ub418\uae30 \ub54c\ubb38\uc5d0 \uc608\uae30\uce58 \ubabb\ud55c \ucf54\ub4dc\uc758 \uc2e4\ud589\uc744 \uac00\uc838\uc62c\uc218 \uc788\uae30 \ub54c\ubb38\uc774\ub2e4. <\/FONT><\/P>\n
\ube44\ud638\ud658 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN><\/B> <\/FONT>\n
\n
\uc0c8\ub85c\uc6b4 \ubc84\uc804\uc758 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uac00 \uad6c\ubc84\uc804\uc758 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc640 \uc774\uc9c4\ucf54\ub4dc \ucc28\uc6d0\uc5d0\uc11c \ud638\ud658 \ub418\uc9c0 \uc54a\ub294\ub2e4\uba74 soname\uc740 \ubcc0\uacbd\ub420 \ud544\uc694\uac00 \uc788\ub2e4. \uc774\uc9c4\ucf54\ub4dc\uc5d0\uc11c \ube44\ud638\ud658\ub418\ub294 \uacbd \uc6b0\uc5d0\ub294 \ub2e4\uc74c\uc758 \ub124\uac00\uc9c0 \uc774\uc720\uac00 \uac00\uc7a5 \uae30\ubcf8\uc801\uc774\ub2e4. <\/FONT>\n
    \n
  1. \ud568\uc218\uc758 \ud589\ub3d9\uc774 \ubcc0\uacbd\ub418\uc5b4 \uc6d0\ub798\uc758 \ud568\uc218\uc2a4\ud399(\uaddc\uaca9)\uc744 \ub354 \uc774\uc0c1 \ub9cc\uc871\ud558\uc9c0 \ubabb\ud560 \ub54c. <\/FONT>\n
  2. \uc678\ub798 \ub370\uc774\ud130 \uc544\uc774\ud15c\uc774 \ubcc0\ud588\uc744\ub54c(\uc608\uc678:\uc635\uc158 \uc544\uc774\ud15c\uc744 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc758 \uad6c\uc870 \ub9c8 \uc9c0\ub9c9 \ubd80\ubd84\uc5d0 \ucca8\uac00\ud558\ub294 \uac83\uc740 \uc774\ub7ec\ud55c \uc544\uc774\ud15c\uad6c\uc870\uac00 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc758 \ub0b4\ubd80\uc5d0 \ud560\ub2f9\ub418 \uc5b4 \uc788\ub294\ud55c \uad1c\ucc2e\uc74c) <\/FONT>\n
  3. \uc678\ub798\ud568\uc218\uac00 \uc81c\uac70\ub418\uc5c8\uc744 \ub54c. <\/FONT>\n
  4. \uc678\ub798\ud568\uc218\uc758 \uc778\ud130\ud398\uc774\uc2a4\uac00 \ubcc0\uacbd\ub418\uc5c8\uc744 \ub54c. <\/FONT><\/LI><\/OL><\/DD><\/DL>\ub9cc\uc57d \uc774\ub7ec\ud55c \uc6d0\uc778\ub4e4\uc744 \ub2f9\uc2e0\uc774 \ud53c\ud574\uac04\ub2e4\uba74 \ub2f9\uc2e0\uc758 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub294 \uc774\uc9c4\ubaa8\ub4dc\uc5d0 \uc11c \ud638\ud658\uac00\ub2a5\ud560 \uac83\uc774\ub2e4. \ub2e4\ub978 \uc2dd\uc73c\ub85c \uc598\uae30\ud558\uc790\uba74 \ub2f9\uc2e0 \uc751\uc6a9\ud504\ub85c\uadf8\ub7a8\uc758 \uc774\uc9c4 \uc778\ud130\ud398\uc774\uc2a4(ABI) \ud638\ud658\uc131\uc740 \uc774\ub7ec\ud55c \ubcc0\uacbd\uc744 \ud558\uc9c0\uc54a\ub294\ub2e4\uba74 \uc9c0\ucf1c\uc9c8 \uac83\uc774\ub2e4. \uc608 \ub97c\ub4e4\uba74 \ub2f9\uc2e0\uc740 \uc0c8\ub85c\uc6b4 \ud568\uc218\ub97c \ucd94\uac00\ud558\ub418 \uae30\uc874\ud568\uc218\ub4e4\uc744 \uc0ad\uc81c\ud558\uc9c0\uc54a\uae38 \uc6d0\ud560\uc218 \uc788 \uc744 \uac83\uc774\ub2e4. \ub2f9\uc2e0\uc740 \uad6c\ubc84\uc804\uc758 \ud504\ub85c\uadf8\ub7a8\uc774 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN> \uad6c\uc870\uc758 \ub05d\ubd80\ubd84\uc5d0 \uc544\uc774\ud15c \uc744 \ucd94\uac00\ud558\uac70\ub098, \ub610\ub294 (\uc751\uc6a9 \ud504\ub85c\uadf8\ub7a8\uc774 \uc544\ub2cc)\ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc5d0\uc11c\ub9cc \uc774\ub7ec\ud55c \uad6c\uc870\ub97c \ud560\ub2f9\ud558\uac70\ub098, \ub610\ub294 \uc5b4\ub5a4 \ud2b9\uc815\ud55c \uc544\uc774\ud15c\uc744 \uc635\uc158\ud654\ud558\ub294(\ub610\ub294 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc5d0\uc11c \uadf8 \uc544\uc774\ud15c\uc744 \ucc44\uc6cc\ub123\ub294)\ub4f1\ub4f1\uc758 \uc774\ub7ec\ud55c \ubcc0\uacbd\uc5d0 \uc601\ud5a5\uc744 \ubc1b\uc9c0\uc54a\uc74c\uc774 \ud655\uc2e4\ud560\ub54c\ub9cc \uadf8 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN> \uad6c\uc870\uc5d0 \uc774\ub7ec\ud55c \uc544\uc774\ud15c\ucd94\uac00\ub97c \ud560\uc218\uc788\ub294 \uac83\uc774\ub2e4. \uc0ac\uc6a9\uc790\ub4e4\uc774 \ubc30\uc5f4\uc744 \uc0ac\uc6a9\ud558\uace0 \uc788\uc744\uc2dc\uc5d0\ub294 \uadf8\ub7ec\ud55c \uad6c\uc870\ud655\uc7a5\uc744 \uc544\ub9c8 \ud560\uc218 \uc5c6\uc744 \uac83\uc784\uc5d0 \uc720\uc758\ud558\ub77c. <\/FONT>\n
    \n
    4. \ub3d9\uc801<\/SPAN>(DL) \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN><\/FONT><\/A><\/H2>\n
    \ub3d9\uc801<\/SPAN> \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub294 \ud504\ub85c\uadf8\ub7a8\uc758 \uc2dc\uc791\uc2dc\uac00 \uc544\ub2cc \ub2e4\ub978\ub54c\uc5d0 \uc801\uc7ac\ub418\ub294 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN> \ub97c \ub9d0\ud55c\ub2e4. \ud50c\ub7ec\uadf8\uc778\ub4f1\uc758 \ubaa8\ub4c8\uc740 \uadf8\uac83\uc758 \ud544\uc694\uc2dc\uae4c\uc9c0 \uc801\uc7ac\ub97c \uae30\ub2e4\ub9ac\ub294 \uac83\uc774 \ud5c8 \uc6a9\ub418\ubbc0\ub85c \uc774\ub4e4\uc758 \uad6c\ud604\uc5d0 \ud2b9\ud788 \uc720\uc6a9\ud558\ub2e4. \uc608\ub97c\ub4e4\uba74 PAM(Pluggable Authenti- cation Module:\uc801\uc7ac\uac00\ub2a5 \uc778\uc99d\ubaa8\ub4c8)\ub4f1\uc758 \uc2dc\uc2a4\ud15c\uc5d0\uc11c\ub294 \uad00\ub9ac\uc790\uac00 \uc778\uc99d\uc744 \uad6c\uc131\ub610 \ub294 \uc7ac\uad6c\uc131\ud558\ub294\ub370 \ub3d9\uc801<\/SPAN> \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \uc0ac\uc6a9\ud55c\ub2e4. \ub610\ud55c \ub3d9\uc801<\/SPAN> \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub294 \uc218\uc2dc\ub85c \uc5b8\uc5b4\ucf54\ub4dc\ub97c \uae30\uacc4\uc5b4\ub85c \ucef4\ud30c\uc77c\ud558\uace0, \ucef4\ud30c\uc77c\ub41c \ubaa8\ub4c8\ub4e4\uc744 \ud6a8\uc728\uc801\uc73c\ub85c \uba48\ucda4\uc5c6\uc774 \uc0ac \uc6a9\ucf54\uc800\ud558\ub294 \uc778\ud130\ud504\ub9ac\ud130\ub97c \uad6c\ud604\ud558\ub294\ub370\ub3c4 \uc720\uc6a9\ud558\ub2e4. \uc774\ub7ec\ud55c \ubc29\ubc95\uc740 \uc800\uc2a4\ud2b8 \uc778\ud0c0 \uc784 \ucef4\ud30c\uc77c\ub7ec(JIT)\ub098 \uba40\ud2f0 \uc720\uc800\ub358\uc804(MUD:multi user dungeon)\uc758 \uac1c\ubc1c\uc5d0\ub3c4 \uc720 \uc6a9\ud558\ub2e4. <\/FONT>\n
    \ub9ac\ub205\uc2a4\uc5d0\uc11c\ub294 \ub3d9\uc801<\/SPAN> \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub294 \ud3ec\ub9f7\ub9cc\uc758 \uad00\uc810\uc5d0\uc11c \ubcf8\ub2e4\uba74 \ud2b9\ubcc4\ud55c \uac83\uc774 \uc544 \ub2c8\ub2e4. \uc989, \uadf8\uac83\uc740 \uc704\uc5d0\uc11c \ub17c\uc758\ud55c \ud45c\uc900\uc801\uc778 \uc624\ube0c\uc81d\ud2b8 \ud30c\uc77c\uc774\ub098 \ud45c\uc900\uc801\uc778 \uacf5\uc720 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub85c\uc368 \ub9cc\ub4e4\uc5b4\uc9c4\ub2e4. \uac00\uc7a5 \uc911\uc694\ud55c \ucc28\uc774\uc810\uc740 \uadf8\uac83\uc774 \ud504\ub85c\uadf8\ub7a8\uc758 \ub9c1\ud06c\uc2dc \ub098 \uc2dc\uc791\uc2dc\uc5d0 \uc790\ub3d9\uc73c\ub85c \uc801\uc7ac\ub418\ub294 \uac83\uc774 \uc544\ub2c8\ub77c\ub294 \uac83\uc774\ub2e4. \uadf8 \ub300\uc2e0\uc73c\ub85c \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \uc5f4\uace0 \uc2ec\ubcfc\uc744 \uc0b4\ud53c\uba70 \uc5d0\ub7ec\ub97c \uc81c\uc5b4\ud558\uace0 \ub2eb\ub294\ub4f1\uc758 API\uac00 \uc81c\uacf5\ub41c\ub2e4. C\uc758 \uc0ac \uc6a9\uc790\ub294 \uc774\ub7ec\ud55c API\ub97c \uc0ac\uc6a9\ud558\uae30 \uc704\ud574\uc11c <dlfcn.h>\ub97c include\ud558\uc5ec\uc57c \ud55c\ub2e4. \ub9ac\ub205\uc2a4\uc5d0\uc11c \uc0ac\uc6a9\ub418\ub294 \uc778\ud130\ud398\uc774\uc2a4\ub97c \ub098\ub294 \"dlopen() API\"\ub77c\uace0 \ubd80\ub974\uba70 \uc194\ub77c\ub9ac \uc2a4\uc758 \uadf8\uac83\uacfc \ud575\uc2ec\uc5d0 \uc788\uc5b4\uc11c\ub294 \ub3d9\uc77c\ud558\ub2e4. \uadf8\ub7ec\ub098 \uc774\ub7ec\ud55c \ub3d9\uc77c\ud55c \ubc29\uc2dd\uc758 \uc778\ud130\ud398 \uc774\uc2a4\uac00 \ubaa8\ub4e0 \ud50c\ub7ab\ud3fc\uc5d0\uc11c \uac19\uc740 \uac83\uc740 \uc544\ub2c8\ub2e4. HP-UX\ub294 shl_load()\ub77c\ub294 \ub2e4\ub978 \uba54 \ucee4\ub2c8\uc998\uc744 \uc0ac\uc6a9\ud558\uba70 \uc708\ub3c4\uc6b0\uc988\uc5d0\uc11c\ub294 DLL\uc744 \uc644\uc804\ud788 \ub2e4\ub978 \uc778\ud130\ud398\uc774\uc2a4\ub85c \ub2e4\ub8ec \ub2e4. \uc774\uc2dd\uc131\uc5d0 \ubaa9\ud45c\ub97c \ub454\ub2e4\uba74 \ud50c\ub7ab\ud3fc\uac04\uc758 \uc774\uc9c8\uc131\uc744 \uc228\uae30\uac8c\ud574\uc8fc\ub294 \uba87\uac1c\uc758 wrapping \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc758 \uc0ac\uc6a9\uc744 \uace0\ub824\ud574\uc57c\ud55c\ub2e4. \ud55c\uac00\uc9c0 \ubc29\ubc95\uc73c\ub85c glib \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc758 \ub3d9\uc801<\/SPAN> \ubaa8\ub4c8\uc801\uc7ac\uae30\ub2a5\uc774 \uc788\ub2e4. \uc774\uac83\uc740 \uc774\ub7ec\ud55c \ud568\uc218\ub4e4\uc758 \uc774\uc2dd\uc131 \uad6c\ud604\uc744 \uc704\ud574 \ud50c\ub7ab\ud3fc\uc758 \ud558\ubd80\uc5d0 \uc788\ub294 \ub3d9\uc801<\/SPAN>\uc801\uc7ac\ub8e8\ud2f4\uc744 \uc0ac\uc6a9\ud55c\ub2e4. \uc774\uc5d0\uad00\ud55c \ub354 \uc790\uc138\ud55c \ub0b4\uc6a9\uc740 [15] <\/FONT>developer.gnome.org\/doc\/API\/glib\/glib-dynamic-loading-of-modules.html<\/FONT><\/A> \uc5d0\uc11c \ubc30\uc6b8\uc218 \uc788\ub2e4. \uc5ec\uae30 \ubb38\uc11c\uc5d0\uc11c \uc798 \uc124\uba85\ub418\uc5b4 \uc788\uc73c\ubbc0\ub85c \ub354 \uc774\uc0c1 \uc758 \uc124\uba85\uc740 \ud558\uc9c0 \uc54a\uaca0\ub2e4. \ub2e4\ub978 \ubc29\ubc95\uc740 [16]GNU libtool\uc911\uc5d0 \ud558\ub098\uc778 libltdl\uc744 \uc4f0\ub294 \uac83\uc774\ub2e4. \uc774\uac83\uc758 \ub2e4\uc591\ud55c \uae30\ub2a5\uc744 \uc4f0\uae30\uc704\ud574\uc11c\ub294 \uc544\ub9c8\ub3c4 COBRA Object Broker(ORB)\ub97c \ubcf4\uae38 \ubc14\ub780\ub2e4. \ub9ac\ub205\uc2a4\uc640 \uc194\ub77c\ub9ac\uc2a4\uc5d0\uc11c \uc81c\uacf5\ud558\ub294 \uae30\ub2a5\uc5d0 \uc5ec\uc804\ud788 \uad00\uc2ec\uc774 \uc788\ub2e4\uba74 \uacc4\uc18d \uc77d\uc5b4\uc8fc\uae38 \ubc14\ub780\ub2e4. <\/FONT>\n
    \n
    dlopen()<\/B> <\/FONT>\n
    \n
    dlopen(3) \ud568\uc218\ub294 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \uc5f4\uc5b4\uc11c \uc0ac\uc6a9\uc900\ube44\ub97c \ud55c\ub2e4. C\uc5d0\uc11c \ud568\uc218\uc758 \uc6d0 \ud615\uc740 \uc544\ub798\uc640 \uac19\ub2e4. <\/FONT>\n
    void *dlopen(const char<\/SPAN> *filename, int flag); <\/FONT>\n
    \ub9cc\uc57d\uc5d0 \ud30c\uc77c\uc758 \uc774\ub984\uc774 \/(\uc989, \uc808\ub300\uacbd\ub85c)\ub85c \uc2dc\uc791\ud55c\ub2e4\uba74 dlopen()\uc740 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \ud0d0\uc0c9\ud558\uc9c0 \uc54a\uc744\uac83\uc774\ub2e4. \uadf8\ub807\uc9c0 \uc54a\ub2e4\uba74 dlopen()\uc740 \ub2e4\uc74c\uacfc \uac19\uc740 \uc21c\uc11c\ub85c \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \ud0d0\uc0c9\ud55c\ub2e4. <\/FONT>\n
      \n
    1. \ucf5c\ub860\uc73c\ub85c \ubd84\ub9ac\ub41c \uc0ac\uc6a9\uc790\uc758 LD_LIBRAR<\/SPAN>Y \ud658\uacbd\ubcc0\uc218\uc758 \uac01 \ub514\ub809\ud1a0\ub9ac \ubaa9\ub85d. <\/FONT>\n
    2. \/etc\/ld.so.cache\uc5d0 \uba85\uc138\ub41c \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub4e4 <\/FONT>\n
    3. \/lib, \uadf8\ub2e4\uc74c\uc740 \/usr\/lib <\/FONT><\/LI><\/OL>dlopen()\uc5d0\uc11c \ud50c\ub798\uadf8\uc758 \uac12\uc740 \ub3d9\uc801<\/SPAN> \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub85c \ubd80\ud130\uc758 \ucf54\ub4dc \uc218\ud589\uc2dc\uc5d0 \ubbf8\uc815\uc758 \ub41c \uc2ec\ubcfc\uac12\uc744 \ud574\uacb0\ud568\uc744 \ub73b\ud558\ub294 RTLD_LAZY, dlopen()\uc774 \ub9ac\ud134\ub418\uae30\uc804 \ubaa8\ub4e0 \ubbf8 \uc815\uc758\ub41c \uc2ec\ubcfc\uc758 \uac12\uc774 \ud574\uacb0\ub418\ub294, \uadf8\ub807\uc9c0 \uc54a\uc73c\uba74 \uc2e4\ud328\ub97c \ub73b\ud558\ub294 RTLD_NOW \uc911\uc758 \ud558\ub098\uac00 \ub418\uc5b4\uc57c \ud55c\ub2e4. \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub0b4\uc5d0\uc11c \uc815\uc758\ub41c \uc678\ub798\uc2ec\ubcfc\uc774 \uc21c\ucc28\uc801\uc73c\ub85c \ud638\ucd9c\ub418\ub294 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub4e4\uc5d0 \uc758\ud574\uc11c \uc720\ud6a8\ud574\uc9d0\uc744 \ub73b\ud558\ub294 RTLD_ GLOBAL\ub610\ud55c \uc0ac\uc6a9\ub418\uac70\ub098 \uc635\uc158\uc774 \ub420 \uc218 \uc788\ub2e4. \ub514\ubc84\uae45 \uc911\uc774\ub77c\uba74 RTLD_LAZY\ub294 \ubbf8\ud574\uacb0\ub41c \uc2ec\ubcfc\ucc38\uc870\uc5d0 \uc758\ud55c \uc608\uce21 \ubd88\uac00\ub2a5\uc758 \uc5d0\ub7ec\ub97c \uc77c\uc73c\ud0ac\uc218 \uc788\uc73c\ubbc0\ub85c RTLD_NOW\ub97c \uc0ac\uc6a9\ud558\uae38 \uc6d0\ud560 \uac83\uc774\ub2e4. RTLD_NOW\ub294 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \uc5ec\ub294\ub370 \uc57d\uac04 \ub290\ub9ac\ub2e4. \uc774\uac83\uc774 \ubb38\uc81c\uac00 \ub41c\ub2e4\uba74 RTLD_LAZY\ub85c \ub098\uc911\uc5d0 \uc804\ud658\ud558\uba74\ub41c\ub2e4. <\/FONT>\n
      \ub9cc\uc57d \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub4e4\uc774 \uc11c\ub85c \uc758\uc874\ud560 \uacbd\uc6b0(\uc608\ub97c \ub4e4\uba74 X\uac00 Y\ub97c \uc758\uc874\ud55c\ub2e4\uba74), \uc758 \uc874\uc774 \ub418\uc5b4\uc8fc\ub294 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>(\uc774 \uc608\uc5d0\uc11c\ub294 Y)\ub97c \uba3c\uc800 \ub85c\ub4dc\ud558\uc5ec\uc57c \ud55c\ub2e4. dlopen()\uc758 \ub9ac\ud134\uac12\uc740 (\uc801\uc7ac\ub418\ub294 \ub3d9\uc801<\/SPAN> \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc758 \uc77c\uc885\uc758 \ud30c\uc77c) \ud578\ub4e4(handle) \uc774\ub2e4. \uadf8\uac83\uc740 \ub2e4\ub978 \ub3d9\uc801<\/SPAN> \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN> \ub8e8\ud2f4\uc5d0\uc11c \uc0ac\uc6a9\ub418\uc5b4\uc9c8 \uc5b4\ub5a0\ud55c \uac12\uc774\ub77c \uace0\ub824 \ub420\uc218 \uc788\uc744 \uac83\uc774\ub2e4. \uc801\uc7ac\uc2dc\ub3c4\uac00 \uc2e4\ud328\ud558\uba74 dlopen()\uc740 NULL\uc744 \ub9ac\ud134\ud560 \uac83\uc774\uba70 \uc810\uac80\ud574 \ubcf4\uae38 \ubc14\ub780\ub2e4. \uac19\uc740 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uac00 \ub450\ubc88 \uc774\uc0c1 dlopen()\uc5d0 \uc758\ud574\uc11c \ub85c\ub4dc\ub41c \ub2e4\uba74 \uac19\uc740 \ud30c\uc77c \ud578\ub4e4\uc774 \ub9ac\ud134\ub41c\ub2e4. <\/FONT>\n
      \ub9cc\uc57d \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc5d0\uc11c _init\ub85c \uba85\uba85\ub41c \ub8e8\ud2f4\uc744 \uc678\ubd80 \ud638\ucd9c \ud55c\ub2e4\uba74 \uadf8 \ucf54\ub4dc\uac00 dlopen()\uc758 \ub9ac\ud134\uc804\uc5d0 \uc218\ud589\ub41c\ub2e4. \uc774\ub7ec\ud55c \uc0ac\uc2e4\uc744 \uc774\uc6a9\ud574 \ub2f9\uc2e0\uc758 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc5d0\uc11c \ucd08\uae30\ud654 \ub8e8\ud2f4\uc744 \uad6c\ud604\ud558\uba74 \ub420 \uac83\uc774\ub2e4. <\/FONT>\n
      <\/P>\n
      dlerror()<\/B> <\/FONT>\n
      \n
      \uc5d0\ub7ec\ub294 dlerror()\uc744 \ud638\ucd9c\ud568\uc73c\ub85c\uc368 \ubcf4\uace0\ub418\ub294\ub370, \uc774 \ud568\uc218\ub294 \uac00\uc7a5 \ucd5c\uadfc\uc758 dlopen(), dlsym(), \ub610\ub294 dlclose()\ub85c \uc778\ud574 \ubc1c\uc0dd\ud55c \uc5d0\ub7ec\ub97c \uae30\uc220\ud558\ub294 \uc2a4\ud2b8\ub9c1 \uc744 \ub9ac\ud134\ud55c\ub2e4. \ud55c\uac00\uc9c0 \ud2b9\ubcc4\ud55c \uc810\uc740 dlerror()\ub97c \ud638\ucd9c\ud558\uace0 \ub09c\ub4a4\uc5d0\ub294 \uadf8 \ub2e4\uc74c\ubd80 \ud130\ub294 \ub610\ub2e4\ub978 \uc5d0\ub7ec\uac00 \ubc1c\uc0dd\ud558\uae30 \uc804\uae4c\uc9c0 dlerror()\ub294 NULL\uc744 \ub9ac\ud134\ud55c\ub2e4\ub294 \uac83\uc774 \ub2e4. <\/FONT>\n
      <\/P>\n
      dlsym()<\/B> <\/FONT>\n
      \n
      \ub3d9\uc801<\/SPAN> \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \uc801\uc7ac\ud558\uace0 \uc0ac\uc6a9\ud558\uc9c0 \ubabb\ud55c\ub2e4\uba74 \uc544\ubb34\ub7f0 \uc758\ubbf8\ub3c4 \uc5c6\uc744 \uac83\uc774\ub2e4. dlsym(3)\uc740 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN> \uc0ac\uc6a9\uc758 \uac00\uc7a5 \uc8fc\ub41c \ub8e8\ud2f4\uc774\uba70 \uc774 \ud568\uc218\ub294 \uc624\ud508\ub41c \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc5d0\uc11c \uc2ec\ubcfc\uac12\uc744 \uc870\uc0ac\ud55c\ub2e4. \uc774\ud568\uc218\ub294 \ub2e4\uc74c\uacfc \uac19\uc774 \uc815\uc758\ub418\uc5b4\uc788\ub2e4. <\/FONT>\n
      void *dlsym(void *handle, char<\/SPAN> *symbol); <\/FONT>\n
      handle\uc740 dlopen()\uc5d0 \uc758\ud574 \ub9ac\ud134\ub418\ub294 \uac12\uc774\uba70 symbol\uc740 NIL-\ub85c \ub05d\ub098\ub294 \ubb38\uc790\uc5f4 \uc774\ub2e4. dlsym()\uc758 \uacb0\uacfc\uac12\uc744 void * \ud0c0\uc78e\uc758 \ud3ec\uc778\ud130\uc5d0 \uc800\uc7a5\ud558\uba74 \ub9e4\ubc88 \uc0ac\uc6a9\uc2dc\ub9c8\ub2e4 \uce90\uc2a4\ud2b8 \uc5f0\uc0b0\uc744 \uc218\ud589\ud574\uc57c \ud558\ubbc0\ub85c(\uadf8\ub9ac\uace0, \ud504\ub85c\uadf8\ub7a8\uc744 \uc720\uc9c0\ud558\ub824\ub294 \ub9ce\uc740 \ub2e4\ub978 \uc0ac \ub78c\ub4e4\uc5d0\uac8c \uc801\uc740 \uc815\ubcf4\ubc16\uc5d0 \uc8fc\uc9c0\ubabb\ud560 \uac83\uc774\ubbc0\ub85c) \ud53c\ud560\uc218 \uc788\ub2e4\uba74 \uc774\ub807\uac8c \ud558\uc9c0\ub9d0\uae38 \ubc14\ub780\ub2e4. <\/FONT>\n
      dlsym()\uc740 \uc2ec\ubcfc\uc774 \ubc1c\uacac\ub418\uc9c0 \uc54a\uc740\uacbd\uc6b0\uc5d0 NULL\uac12\uc744 \ub9ac\ud134\ud558\uac8c\ub41c\ub2e4. \ub9cc\uc57d\uc5d0 \uc5b4 \ub5a4 \uc2ec\ubcfc\uc774 \uacb0\ucf54 \uc81c\ub85c\ub098 NULL\uac12\uc744 \uac00\uc9c0\uc9c0 \uc54a\uc744 \uac83\uc744 \ub2f9\uc2e0\uc774 \uc54c\uace0 \uc788\ub2e4\uba74 \uc544 \ubb34\ub7f0 \ubb38\uc81c\ub3c4 \uc5c6\uc73c\ub098 \ub9cc\uc57d \uadf8\ub807\uc9c0 \uc54a\ub2e4\uba74 \uc7a0\uc7ac\uc801\uc778 \ubaa8\ud638\uc131\uc774 \uc874\uc7ac\ud558\uac8c \ub41c\ub2e4, \uc989 \ub9cc\uc57d\uc5d0 NULL\uac12\uc744 \uac00\uc9c0\uac8c \ub41c \uacbd\uc6b0 \uadf8\uac83\uc774 \uadf8\ub7f0 \uc2ec\ubcfc\uc774 \uc874\uc7ac\ud558\uc9c0 \uc54a\ub294\ub2e4\ub294 \uac83 \uc778\uc9c0 \uc544\ub2c8\uba74 \uc2e4\uc81c\ub85c \uadf8 \uc2ec\ubcfc\uc758 \uac12\uc774 NULL\uc778\uc9c0 \ud558\ub294 \uac83\uc774\ub2e4. \ud45c\uc900\uc801\uc778 \ud574\uacb0 \ucc45\uc740 dlerror()\uc744 \ud638\ucd9c(\uc874\uc7ac\ud560\uc218 \uc788\ub294 \ubaa8\ub4e0 \uc5d0\ub7ec\uc758 \uac00\ub2a5\uc131\uc744 \ud574\uc18c\ud558\ub294\uac83\uc784) \ud558\uace0 \uadf8\ub2e4\uc74c\uc73c\ub85c \uc2ec\ubcfc\uac12\uc744 \uc54c\uae30\uc704\ud574 dlsym()\uc744 \ud638\ucd9c\ud55c \ub4a4 dlerror()\uc744 \ud55c\ubc88 \ub354 \ud638\ucd9c\ud558\uc5ec \uc5d0\ub7ec\uac00 \ubc1c\uc0dd\ud588\ub294\uc9c0\ub97c \uc810\uac80\ud558\ub294 \uac83\uc774\ub2e4. \uc774 \ubd80\ubd84\uc758 \ucf54\ub4dc\ub97c \ubc1c\ucdcc\ud55c \ub2e4\uba74 \uc544\ub798\uc640 \uac19\uc744 \uac83\uc774\ub2e4. <\/FONT>
      dlerror(); \/* \uc5d0\ub7ec\ucf54\ub4dc\uc758 \ucd08\uae30\ud654 *\/ s = (actual_type) dlsym(handle, symbol_being_sear<\/SPAN>ched_for); if ((err = dlerror()) != NULL) \/* \uc2ec\ubcfc\uac12\uc744 \ucc3e\uc9c0 \ubabb\ud560\ub54c *\/ else \/* \uc2ec\ubcfc\uac12\uc744 \ucc3e\uc558\uc744 \ub54c \uadf8 \uac12\uc774 s\uc5d0 \uc788\uc74c *\/ <\/FONT><\/PRE>\n
      dlclose()<\/B> <\/FONT>\n
      \n
      dlclose()\ub294 dlopen()\uc758 \uc5ed\uc73c\ub85c\uc368 \ub3d9\uc801<\/SPAN> \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \ub2eb\ub294\ub370 \uc0ac\uc6a9\ub41c\ub2e4. \ub3d9\uc801<\/SPAN> \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub294 \ub3d9\uc801<\/SPAN> \ud30c\uc77c\ud578\ub4e4\uc5d0 \uad00\ud55c \ub9c1\ud06c\uc218\ud6a8\ub97c \uacc4\uc18d \uc720\uc9c0\ud558\uace0 \uc788\uc73c\ubbc0\ub85c \uc801\uc5b4 \ub3c4 dlopen()\uc774 \ud638\ucd9c\ub41c \ud69f\uc218\ub9cc\ud07c\uc758 dlclose()\uc758 \uc218\ud589\uc774 \uc5c6\uae30 \uc804\uc5d0\ub294 \uc2e4\uc81c\uc801\uc73c\ub85c \uba54\ubaa8\ub9ac\uc5d0\uc11c \uc0ad\uc81c\ub418\uc9c0 \uc54a\ub294\ub2e4. \uadf8\ub798\uc11c \uac19\uc740 \ud504\ub85c\uadf8\ub7a8\uc774 \uac19\uc740 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \uc5ec \ub7ec\ubc88 \ud638\ucd9c\ud558\ub294 \uac83\uc740 \uc544\ubb34\ub7f0 \ubb38\uc81c\uac00 \ub418\uc9c0 \uc54a\ub294\ub2e4. <\/FONT><\/P><\/DD><\/DL>\n
      \ub3d9\uc801<\/SPAN> \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc758 \uc608<\/B> dlopen()\uc758 \ub9e4\ub274\uc5bc \ud398\uc774\uc9c0\uc5d0 \ub098\uc624\ub294 \ub3d9\uc801<\/SPAN>\ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc758 \uc608\uac00 \uc544\ub798\uc5d0 \uc788\ub2e4. \uc608 \uc5d0\uc11c\ub294 \uc218\ud559\ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uac00 \ub85c\ub4dc\ub418\uace0 2.0\uc758 cosine\uac12\uc774 \ucd9c\ub825\ub418\uba70 \ub9e4\uc21c\uac04\ub9c8\ub2e4 \uc5d0 \ub7ec\ub97c \uac80\uc0ac(\uad8c\uace0\ub428)\ud55c\ub2e4. <\/FONT><\/P>\n
      \n<\/FONT>
       #include <stdio.h> #include <dlfcn.h> int main(int ar<\/SPAN>gc, char<\/SPAN> **ar<\/SPAN>gv) void *handle; double (*cosine)(double); char<\/SPAN> *error; handle = dlopen (\"\/lib\/libm.so\", RTLD_LAZY); if (!handle) fputs (dlerror(), stderr); exit(1); cosine = dlsym(handle, \"cos\"); if ((error = dlerror()) != NULL) fputs(error, stderr); exit(1); printf (\"%f\", (*cosine)(2.0)); dlclose(handle); <\/FONT><\/PRE>\n
      \n<\/FONT>\n
      \ub9cc\uc57d \uc704\uc758 \ud504\ub85c\uadf8\ub7a8\uc758 \uc774\ub984\uc774 foo.c \ub77c\uba74 \ub2e4\uc74c\uc758 \uba85\ub839\uc744 \uc368\uc11c \uc2e4\ud589\ud504\ub85c\uadf8\ub7a8\uc744 \ub9cc\ub4e4 \uc218 \uc788\ub2e4. <\/FONT>\n
      gcc -Wl,export-dynamic -o foo foo.c -ldl -WI, export-dynamic \uc635\uc158\uc740 \uc2e4\uc9c8\uc801\uc73c\ub85c \ud544\uc694\ud55c \uac83\uc740 \uc544\ub2c8\ub098 \ub54c\ub54c\ub85c \uc720\uc6a9\ud568 \uc744 \uc54c\uac8c\ub420 \uac83\uc774\ub2e4. \uadf8\uac83\uc740 ld\uc5d0 \uc815\uc758\ub418\uc5b4 \uc788\ub294\ub370 ELF\ud30c\uc77c\uc758 \uc0dd\uc131<\/SPAN>\uc2dc\uc5d0 \uc774\uc635\uc158 \uc740 \ubaa8\ub4e0 \uc2ec\ubcfc\uc744 \ub2e4\uc774\ub098\ubbf9 \uc2ec\ubcfc\ud14c\uc774\ube14\uc5d0 \ubd80\uac00\ud55c\ub2e4. \ud1b5\uc0c1\uc801\uc73c\ub85c \ub2e4\uc774\ub098\ubbf9 \uc2ec\ubcfc\ud14c \uc774\ube14\uc740 \ub3d9\uc801<\/SPAN> \uc624\ube0c\uc81d\ud2b8\uc5d0\uc11c \uc0ac\uc6a9\ub418\ub294 \uc2ec\ubcfc\ub9cc\uc744 \uac00\uc9c0\uace0 \uc788\ub2e4. \uc774 \uc635\uc158\uc740 dlopen()\uc758 \uc5b4\ub5a4 \uc6a9\ub3c4\uc5d0\uc11c \ud544\uc694\ud558\ub2e4. -WI, export-dynamic \ubcf4\ub2e4 -rdynamic\uc744 \uc4f0\ub77c\uace0 \ub9d0\ud560\uc218\ub3c4 \uc788\uaca0\uc9c0\ub9cc ELF\ubb38\uc11c\uc5d0 \uc758\ud558\uba74 -rdynamic\uc740 \ube44 \ub9ac\ub205\uc2a4 \uc2dc\uc2a4 \ud15c\uc758 gcc\uc5d0\uc11c\ub294 \ud56d\uc0c1 \uc81c\ub300\ub85c \ub3d9\uc791\ud558\ub294 \uac83\uc740 \uc544\ub2c8\ub77c\uace0 \ud55c\ub2e4. <\/FONT>\n
      5. \ubd80\uac00\uc801 \ub0b4\uc6a9\ub4e4<\/FONT><\/A><\/H2>\n
      nm \uba85\ub839<\/B> <\/FONT>\n
      nm\uba85\ub839\uc740 \uc8fc\uc5b4\uc9c4 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc758 \uc2ec\ubcfc\ubaa9\ub85d\uc744 \ubcf4\uace0\ud55c\ub2e4. \uadf8\uac83\uc740 \uacf5\uc720 \ubc0f \uc815\uc801 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN> \ubaa8\ub450\uc5d0\uc11c \ub3d9\uc791\ud55c\ub2e4. \uc8fc\uc5b4\uc9c4 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc758 \uc815\uc758\ub41c \uc2ec\ubcfc\uba85\uacfc \uac12 \uadf8\ub9ac\uace0 \ud0c0\uc78e\uc744 \uc54c\ub824\uc900\ub2e4. \uc774 \uba85\ub839\uc740 \ub610\ud55c \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc5d0\uc11c \uc774 \uc815\ubcf4\uac00 \uc720\ud6a8\ud558\uac8c \ub418\uc5b4\uc788 \ub2e4\uba74(-ls\uc635\uc158\uc744 \ubcf4\ub77c) \uc18c\uc2a4\ucf54\ub4dc\uc0c1\uc758 \uc5b4\ub514\uc5d0\uc11c \uc2ec\ubcfc\uc774 \uc815\uc758\ub418\uc5c8\ub294\uac00(\ud30c\uc77c\uc774\ub984\uacfc \ub77c\uc778\ub118\ubc84\ub85c)\ub3c4 \uc54c\ub824\uc900\ub2e4. <\/FONT>\n
      \uc2ec\ubcfc\ud0c0\uc78e\uc5d0 \ub300\ud574\uc11c\ub294 \uc880\ub354 \uc124\uba85\uc774 \ud544\uc694\ud558\ub2e4. \ud0c0\uc78e\uc774 \ubcf4\uace0\ub420 \ub54c \uc18c\ubb38\uc790\ub294 \uc9c0\uc5ed \ubcc0\uc218\uc784\uc744 \ub098\ud0c0\ub0b4\uba70 \ub300\ubb38\uc790\ub294 \uc804\uc5ed(\uc678\ubd80)\ubcc0\uc218\uc784\uc744 \ub098\ud0c0\ub0b8\ub2e4. \uc804\ud615\uc801\uc778 \uc2ec\ubcfc\ud0c0\uc78e \uc5d0\ub294 T(\ucf54\ub4dc\ubd80\ubd84\uc5d0\uc11c \ubcf4\ud1b5\uc758 \uc815\uc758), D(\ucd08\uae30\ud654\ub41c \ub370\uc774\ud0c0 \ubd80\ubd84), B(\ucd08\uae30\ud654 \uc54a\ub41c \ub370\uc774\ud130 \uc139\uc158), U(\ubbf8\uc815\uc758:\uc2ec\ubcfc\uc774 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc5d0\uc11c \uc0ac\uc6a9\ub418\ub098 \uadf8 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc5d0 \uc758 \ud574\uc11c \uc815\uc758\ub418\uc9c0 \uc54a\uc74c), W(\ub2e4\ub978 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uac00 \uc774 \uc2ec\ubcfc\uc744 \uc815\uc758\ud558\uba74 \uadf8 \ub0b4\uc6a9\uc774 \uc774 \ub97c \ub300\uce58(override)\ud568)\ub4f1\uc774 \uc788\ub2e4. <\/FONT>\n
      \ud568\uc218\uc758 \uc774\ub984\uc740 \uc54c\uace0 \uc788\uc9c0\ub9cc \uc815\ud655\ud788 \uc5b4\ub290 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc5d0\uc11c \uc815\uc758\ub418\uc5b4\uc788\ub294\uc9c0 \ubaa8 \ub978\ub2e4\uba74 nm \uba85\ub839\uc758 -o\uc635\uc158(\uac01 \ub77c\uc778\ub9c8\ub2e4 \ud30c\uc77c\uba85\uc744 \uc55e\uc5d0 \ubcf4\uc5ec\uc90c)\uc744 \uc0ac\uc6a9\ud558\uace0 \ub3d9 \uc2dc\uc5d0 grep\uba85\ub839\uc744 \uc368\uc11c \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc758 \uc774\ub984\uc744 \ucc3e\uc544\ubcf4\uae38 \ubc14\ub780\ub2e4. Bourne shell\uc5d0\uc11c \/lib, \/usr\/lib\uc758 \ubaa8\ub4e0 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc640 \/usr\/lib, \/usr\/local\/lib\uc758 \uc9c1\uacc4 \uc11c \ube0c\ub514\ub809\ud1a0\ub9ac\uc5d0\uc11c \"cos\"\ub97c \ucc3e\ub294 \uac83\uc740 \uc544\ub798\uc640 \uac19\uc744 \uac83\uc774\ub2e4. <\/FONT><\/P>\n
      \n<\/FONT>
      nm -o \/lib\/* \/usr\/lib\/* \/usr\/lib\/*\/* \/usr\/local\/lib\/* 2> \/dev\/null | grep 'cos$' <\/FONT><\/PRE>\n
      \n\ub354 \uc774\uc0c1\uc758 \uc790\uc138\ud55c \ub0b4\uc6a9\uc740 [17]info:binutils#nm\uc744 \ucc38\uc870\ud558\ub77c \uacf5\uc720 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub294 \uc2a4\ud06c~Pl\ud2b8\uc77c\uc218 \uc788\ub2e4. <\/FONT>\n
      GNU \ub85c\ub354\ub294 \uacf5\uc720 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uac00 \ubc14\uc774\ub108\ub9ac \uc774\uc678\uc5d0\ub3c4 \ud2b9\uc815\ud55c \uc2a4\ud06c\ub9bd\ud2b8\uc5b8\uc5b4\ub85c \uc791\uc131\ub41c \ud14d\uc2a4\ud2b8\ud30c\uc77c\ub85c\ub3c4 \uac00\ub2a5\ud558\ub3c4\ub85d \ud5c8\uc6a9\ud558\uace0 \uc788\uc74c\uc744 \uc54c\ud544\uc694\uac00 \uc788\ub2e4. \uc774\uac83\uc740 \uac04 \uc811\uc801\uc73c\ub85c \ub2e4\ub978 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub4e4\uc744 \uc870\ud569\ud558\ub294\ub370 \uc720\uc6a9\ud558\ub2e4. \uc608\ub97c \ub4e4\uc5b4 \ub098\uc758 \uc2dc\uc2a4\ud15c\uc911 \uc758 \ud558\ub098\uc5d0 \uc0ac\uc6a9\ub41c \/usr\/lib\/libc.so\uc758 \ubaa9\ub85d\uc774 \uc544\ub798\uc5d0 \ub098\uc640\uc788\ub2e4. <\/FONT>\n
      \/* \uacf5\uc720 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \uba3c\uc800 \uc0ac\uc6a9\ud558\uba70 \ub2e8 \uc5b4\ub5a4 \ud568\uc218\ub4e4\uc740 \uc815\uc801 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc774\ubbc0 \ub85c \uadf8\uac83\uc744 \ub2e4\uc74c\ucc28\ub840\ub85c \uc0ac\uc6a9\ud558\ub294 GNU ld script\uc784. *\/ GROUP ( \/lib\/libc.so.6 \/usr\/lib\/libc_nonshar<\/SPAN>ed.a ) \ub354 \ub9ce\uc740 \ub0b4\uc6a9\uc740 ld \ub9c1\ucee4\uc5d0 \uad00\ud55c texinfo \ubb38\uc11c\ub97c \ubcf4\ub77c. \uc77c\ubc18\uc801\uc778 \uc815\ubcf4\ub294 info:ld#Options, info:ld#Commands, \uadf8\ub9ac\uace0 \ube44\uc2b7\ud55c info:ld#Option Commands \ub4f1\uc5d0\uc11c \ucc3e\uc544\ubcf4\ub77c <\/FONT>\n
      GNU Libtool<\/B> <\/FONT>\n
      \ub2e4\uc591\ud55c \uc2dc\uc2a4\ud15c\uc5d0 \uc774\uc2dd\uac00\ub2a5\ud55c \uc751\uc6a9\ud504\ub85c\uadf8\ub7a8\uc744 \uc81c\uc791\uc911\uc774\ub77c\uba74 GNU Libtool\uc744 \uc0ac\uc6a9\ud558\uc5ec \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \ub9cc\ub4e4\uace0 \uc124\uce58\ud560 \uac83\uc744 \uace0\ub824\ud574 \ubcf4\ub77c. GNU Libtool\uc740 \uc804 \ud615\uc801\uc778 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN> \uc9c0\uc6d0 \uc2a4\ud06c\ub9bd\ud2b8\uc774\ub2e4. Libtool\uc740 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN> \uc0ac\uc6a9\uc758 \ubcf5\uc7a1\uc131 \uc744 \uc77c\uad00\ub418\uace0 \uc774\uc2dd\uac00\ub2a5\ud55c \uc778\ud130\ud398\uc774\uc2a4\ub97c \ud1b5\ud574\uc11c \uc81c\uac70\ud574\uc904 \uac83\uc774\ub2e4. Libtool\uc740 \uc624 \ube0c\uc81d\ud2b8 \ud30c\uc77c\uc758 \uc0dd\uc131<\/SPAN>, \uc815\uc801 \ubc0f \uacf5\uc720\ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc758 \ub9c1\ud06c, \uc2e4\ud589 \ubc14\uc774\ub108\ub9ac\uc758 \ub9c1\ud06c \ubc0f \ub514\ubc84\uadf8, \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc758 \uc124\uce58, \uc2e4\ud589 \ubc14\uc774\ub108\ub9ac\uc758 \uc124\uce58\ub97c \uc704\ud55c \uc774\uc2dd\uc801 \uc778\ud130\ud398\uc774 \uc2a4\ub97c \uc81c\uacf5\ud55c\ub2e4. \uadf8\uc548\uc5d0\ub294 libltdl\uc774\ub77c\ub294 \ub3d9\uc801<\/SPAN>\uc801\uc7ac \ud504\ub85c\uadf8\ub7a8\uc744 \uc704\ud55c \uc774\uc2dd\uc131 wrapper\uac00 \ub610\ud55c \ud3ec\ud568\ub41c\ub2e4. \ub354 \ub9ce\uc740 \uc815\ubcf4\ub294 [19] <\/FONT>www.gnu.org\/softwar<\/SPAN>e\/libtool\/manual.html<\/FONT><\/A> \uc5d0\uc11c \ucc3e\uc544\ubcf4\uae38 \ubc14\ub780\ub2e4. <\/FONT>\n
      6. \uc0ac\uc6a9\ubc95\uc758 \uc608\uc2dc<\/FONT><\/A><\/H2>\n
      \uc544\ub798 \ubd80\ud130\ub294 (\uc815\uc801, \uacf5\uc720 \ubc0f \ub3d9\uc801<\/SPAN> \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc758)\uc138\uac00\uc9c0 \ud615\ud0dc\uc758 \ubaa8\ub4e0 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc758 \uc608\uc774\ub2e4. libhello.c\ub294 libhello.h\ub97c \ud5e4\ub354\ub85c \ud558\ub294 \ubcf4\ud1b5\uc758 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc774\uba70, demo_use.c\ub294 libhello.c\ub97c \ud638\ucd9c\ud558\ub294 \ud3c9\ubc94\ud55c \ud504\ub85c\uadf8\ub7a8\uc774\ub2e4. \uadf8 \ub2e4\uc74c\uc5d0\ub294 \uc774\uac83\uc774 \uc5b4\ub5bb\uac8c \uc815\uc801 \ubc0f \uacf5\uc720\ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub85c \uc0ac\uc6a9\ub418\ub294\uac00\uc758 \uc608\ub97c \ubcf4\uc5ec\uc8fc\ub294 \uc2a4\ud06c\ub9bd\ud2b8 (script_static, script_shar<\/SPAN>ed)\uac00 \uc8fc\uc11d\uacfc \ud568\uaed8 \uc788\uc73c\uba70, \uadf8 \ub2e4\uc74c\uc5d0\ub294 \uacf5\uc720 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uac00 \uc5b4\ub5bb\uac8c \ub3d9\uc801<\/SPAN> \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub85c \uc0ac\uc6a9\ub418\ub294\uc9c0\ub97c \ubcf4\uc5ec\uc8fc\ub294 demo_ dyanmic.c\uc640 script_dynamic\uc774 \uc788\ub2e4. <\/FONT>\n
      File libhello.c \/* libhello.c - \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub85c \uc0ac\uc6a9\ub418\ub294 \ud30c\uc77c *\/ #include <stdio.h> void hello(void) printf(\"Hello, librar<\/SPAN>y world.\"); <\/FONT>\n
      <\/P>\n
      \n<\/FONT>
      File libhello.h \/* libhello.h - \ud5e4\ub354 \ud30c\uc77c *\/ void hello(void); <\/FONT><\/PRE>\n
      \n<\/FONT>\n
      File demo_use.c \/* demo_use.c -- \ubc14\ub85c hello\ub8e8\ud2f4\uc744 \uc0ac\uc6a9\ud558\ub294 \uc608 *\/ #include \"libhello.h\" int main(void) { hello(); return 0; } <\/FONT>\n
      <\/P>\n
      \n<\/FONT>
      File script_static #!\/bin\/sh # \uc815\uc801 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN> \ub370\ubaa8 # \uc815\uc801 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc758 \uc624\ube0c\uc81d\ud2b8 \ud30c\uc77c\uc778 libhello-static.o\uc0dd\uc131<\/SPAN>. # libhello-static\uc774\ub77c\ub294 \uc774\ub984\uc744 \uc0ac\uc6a9\ud558\ub294 \uac83\uc740 \uc815\uc801 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN> # \uc640 \ub3d9\uc801<\/SPAN> \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN> \uc0ac\uc6a9\uc744 \uc5c4\uc5f0\ud788 \uad6c\ubcc4\ud558\uae30 \uc704\ud55c\uac83\uc77c \ubfd0\uc774\ubbc0 # \ub85c -static\uc774\ub77c\ub294 \uc774\ub984\uc744 \uc624\ube0c\uc81d\ud2b8 \ud30c\uc77c\uc774\ub098 \uc815\uc801 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc5d0 # \uc4f8 \ud544\uc694\ub294 \uc5c6\ub2e4. gcc -Wall -g -c -o libhello-static.o libhello.c # \uc815\uc801 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc758 \uc0dd\uc131<\/SPAN>. ar<\/SPAN> rcs libhello-static.a libhello-static.o # \uc5ec\uae30\uc11c libhello-static.a\ub97c \ub098\uc911\uc5d0 \uc0ac\uc6a9\ud558\uae30 # \uc704\ud574 \uc5b4\ub518\uac00\uc5d0 \ubcf5\uc0ac\ud574 \ub193\uc744\uc218 \uc788\uc744 \uac83\uc774\ub2e4. # \ub370\ubaa8 \ubaa9\uc801\uc73c\ub85c \uc0ac\uc6a9\ud558\uae30 \uc704\ud574\uc11c \uc6b0\ub9ac\ub294 # \ud604\uc7ac\uc758 \ub514\ub809\ud1a0\ub9ac\uc5d0 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \ub450\uae30\ub85c \ud55c\ub2e4. # demo_use \ud504\ub85c\uadf8\ub7a8\uc758 \ucef4\ud30c\uc77c gcc -Wall -g -c demo_use.c -o demo_use.o # demo_use \ud504\ub85c\uadf8\ub7a8\uc758 \uc0dd\uc131<\/SPAN>; -L. \uc635\uc158\uc740 \".\" \uac00 \ud504\ub85c\uadf8\ub7a8 # \uc758 \uc0dd\uc131<\/SPAN>\uc2dc\uc5d0 \uac80\uc0c9\ub418\uac8c \ud55c\ub2e4. \uc774 \uba85\ub839\uc73c\ub85c libhello-static.a\uc5d0 # \uc788\ub294 \uad00\ub828\ub41c \uc624\ube0c\uc81d\ud2b8\uac00 \ud30c\uc77c demo_use_static\uc5d0 \uc0bd\uc785\ub41c\ub2e4. gcc -g -o demo_use_static demo_use.o -L. -lhello-static # \ud504\ub85c\uadf8\ub7a8\uc758 \uc2e4\ud589 .\/demo_use_static <\/FONT><\/PRE>\n
      \n\n
      \n<\/FONT>
      File script_shar<\/SPAN>ed #!\/bin\/sh # \uacf5\uc720 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc758 \ub370\ubaa8 # \uacf5\uc720 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc758 \uc624\ube0c\uc81d\ud2b8 \ud30c\uc77c libhello.o\uc758 \uc0dd\uc131<\/SPAN>. gcc -fPIC -Wall -g -c libhello.c # \uacf5\uc720 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc758 \uc0dd\uc131<\/SPAN>. # -lc\ub97c \uc0ac\uc6a9\ud558\uc5ec C \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc640 \ub9c1\ud06c\ud55c\ub2e4. \uc65c\ub0d0\ud558\uba74 # libhello\uac00 C \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc5d0 \uc758\uc874\ub418\uae30 \ub54c\ubb38\uc774\ub2e4. gcc -g -shar<\/SPAN>ed -Wl,-soname,libhello.so.0 \\ -o libhello.so.0.0 libhello.o -lc # \uc5ec\uae30\uc11c libhello.so.0.0\ub97c \uc5b4\ub5a4 \ub514\ub809\ud1a0\ub9ac \uc774\ub97c\ud14c\uba74 # \/usr\/local\/lib\uc5d0 \ubcf5\uc0ac\ud558\uc5ec\ub3c4 \ub41c\ub2e4. # \uc774\uc81c ldconfig\ub97c \uc774\uc6a9 \uc2ec\ubcfc\ub9ad \ub9c1\ud06c\ub97c \ub9cc\ub4e0\ub2e4. # soname\uc744 \uc14b\uc5c5\ud568. \uc544\ub798\uc640 \uac19\uc774 \ud574\ub3c4 \ubb34\ubc29\ud558\ub2e4. # ln -sf libhello.so.0.0 libhello.so.0 # \uc5ec\uae30\uc11c\ub294 \uadf8\ub0e5 ldconfig\ub85c \ud558\ub3c4\ub85d \ud55c\ub2e4. \/sbin\/ldconfig -n . # linker name\uc744 \uc14b\ud305\ud55c\ub2e4. # \uc880\ub354 \uba74\ubc00\ud558\uac8c \ud558\ub824\uba74 \uc774\ubbf8 \uc874\uc7ac\ud558\ub294 linker name\uc774 # \uc788\ub294\uc9c0 \ud655\uc778\ud574\ubcf4\uace0 \ub9cc\uc57d \uadf8\ub807\ub2e4\uba74 \uadf8\ub0e5 \ub194\ub46c\uc57c \ud560\uc9c0 # \uc544\ub2cc\uc9c0\ub97c \uc798 \uccb4\ud06c\ud574\uc57c\ud55c\ub2e4. ln -sf libhello.so.0 libhello.so # demo_use \ud504\ub85c\uadf8\ub7a8 \ud30c\uc77c\uc744 \ucef4\ud30c\uc77c\ud55c\ub2e4. gcc -Wall -g -c demo_use.c -o demo_use.o # demo_use \ud504\ub85c\uadf8\ub7a8\uc758 \uc0dd\uc131<\/SPAN>. # -L. \uc740 \".\" \uc774 \ud504\ub85c\uadf8\ub7a8\uc758 \uc0dd\uc131<\/SPAN>\uc2dc\uc5d0 \uac80\uc0c9\ub418\ub3c4\ub85d # \ud55c\ub2e4. \".\" \uac00 \ud504\ub85c\uadf8\ub7a8 \uc2e4\ud589\uc2dc\uc5d0 \uac80\uc0c9\ub418\ub294 \uac83\uc774 # \uc544\ub2d8\uc5d0 \uc720\uc758\ud558\ub77c. gcc -g -o demo_use demo_use.o -L. -lhello # \ud504\ub85c\uadf8\ub7a8 \uc2e4\ud589. LD_LIBRAR<\/SPAN>Y_PATH\ub97c \uc0ac\uc6a9 # \ud558\uc5ec \uacf5\uc720 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uac00 \uc5b4\ub514\uc5d0 \uc788\ub294\uac00\ub97c # \ud504\ub85c\uadf8\ub7a8\uc5d0 \uc54c\ub824 \uc8fc\uc5b4\uc57c\ud55c\ub2e4. LD_LIBRAR<\/SPAN>Y_PATH=\".\" .\/demo_use <\/FONT><\/PRE>\n
      \nFile demo_dynamic.c \/* demo_dynamic.c -- \"hello\" routine\uc758 \ub3d9\uc801<\/SPAN>\uc801\uc7ac\uc640 \uc0ac\uc6a9\uc758 \uc608 *\/ <\/FONT>\n
      \/* dlfcn.h \ud30c\uc77c\uc774 \ub3d9\uc801<\/SPAN>\uc801\uc7ac \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN> \ub8e8\ud2f4\uc5d0 \ud544\uc694\ud568 *\/ #include <dlfcn.h> #include <stdio.h> \/* \"libhello.h\"\ub97c include\ud560 \ud544\uc694\uac00 \uc5c6\uc74c\uc5d0 \uc720\uc758\ud558\ub77c. \uadf8\ub807\uc9c0\ub9cc \uadf8\uc640 \uad00\ub828\ud558\uc5ec \uc5b4\ub5a4 \uac83\uc740 \ubc18\ub4dc\uc2dc \uba85\uc2dc\ud574\uc57c\ud55c\ub2e4; \uc989, dlsym()\uc73c\ub85c \uc5bb\uc740 \uac12\uc744 \uac00\uc9c0\uace0 \uc788\uc744 \ub370\uc774\ud130\uc758 \ud0c0\uc78e \uc740 \ubd84\uba85\ud788 \uc815\ud574\uc838\uc57c \ud55c\ub2e4. *\/ \/* \"simple_demo_function\" \ud0c0\uc78e\uc740 \ub9e4\uac1c\ubcc0\uc218\uc640 \ub9ac\ud134\uac12\uc774 \uc5c6\ub294 \ud568\uc218\uc758 \ud0c0\uc78e\uc744 \ub9d0\ud55c\ub2e4. *\/ typedef void (*simple_demo_function)(void); <\/FONT>\n
      int main(void) const char<\/SPAN> *error; void *module; simple_demo_function demo_function; \/* \ub3d9\uc801<\/SPAN> \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \uc801\uc7ac\ud568 *\/ module = dlopen(\"libhello.so\", RTLD_LAZY); if (!module) fprintf(stderr, \"Couldn't open libhello.so: %s\", dlerror()); exit(1); <\/FONT>\n
      \n
      \/* \uc2ec\ubcfc\uc744 \uac00\uc838\uc634 *\/ dlerror(); demo_function = dlsym(module, \"hello\"); if ((error = dlerror())) fprintf(stderr, \"Couldn't find hello: %s\", error); exit(1); <\/FONT>\n
      \n
      \/* DL \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc758 \ud568\uc218\ub97c \ud638\ucd9c\ud55c\ub2e4. *\/ (*demo_function)(); \/* \ubaa8\ub4e0 \uac83\uc744 \ub9c8\uce5c \ub4a4 \ud655\uc2e4\ud788 \ud074\ub85c\uc9d5\ud55c\ub2e4. *\/ dlclose(module); return 0; <\/FONT>\n
      <\/P>\n
      \n<\/FONT>
       File script_dynamic #!\/bin\/sh # \ub3d9\uc801<\/SPAN> \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN> \ub370\ubaa8 # libhello.so\uc640 friends\uac00 \uc774\ubbf8 # \uc0dd\uc131<\/SPAN>\ub418\uc5c8\uc74c\uc744 \uac00\uc815\ud55c\ub2e4. ( dynamic\uc758 \uc608\ub97c \ubcf4\ub77c). # demo_dynamic \ud504\ub85c\uadf8\ub7a8\uc744 \uc624\ube0c\uc81d\ud2b8 \ud30c\uc77c\ub85c \ucef4\ud30c\uc77c. gcc -Wall -g -c demo_dynamic.c # demo_use \ud504\ub85c\uadf8\ub7a8\uc758 \uc0dd\uc131<\/SPAN>. # \uc774 \ud504\ub85c\uadf8\ub7a8\uc774 \uc0ac\uc6a9\ud558\ub294 \ud2b9\uc815\uc758 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub294 \ud504\ub85c\uadf8\ub7a8\uc774 # \uc2dc\uc791\ub418\uace0 \ub09c\ub4a4\uac00 \ub418\uae30 \uc804\uae4c\uc9c0\ub294 \uc801\uc7ac\ub418\uc9c0 \uc54a\uae30 \ub54c\ubb38\uc5d0 \ub3d9\uc801<\/SPAN> # \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \ucc3e\uae30\uc704\ud574 \uc5b4\ub514\ub97c \uac80\uc0c9\ud574\uc57c \ud558\ub294\uc9c0 \uc54c\ub9b4 \ud544\uc694\uac00 # \uc5c6\uc74c\uc5d0 \uc720\uc758\ud558\ub77c. # \uadf8\ub807\uc9c0\ub9cc \ub3d9\uc801<\/SPAN> \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \uc801\uc7ac\ud558\ub294 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c # \ud3ec\ud568\ud558\uae30 \uc704\ud574\uc11c -ldl\uc635\uc158\uc740 \ubc18\ub4dc\uc2dc \ud544\uc694\ud558\ub2e4. gcc -g -o demo_dynamic demo_dynamic.o -ldl # \ud504\ub85c\uadf8\ub7a8\uc758 \uc2e4\ud589. LD_LIBRAR<\/SPAN>Y_PATH \ub97c \uc774\uc6a9\ud558\uc5ec # \ud504\ub85c\uadf8\ub7a8\uc774 \uc5b4\ub514\uc11c \ub3d9\uc801<\/SPAN> \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \uc5bb\uc744\uc218 # \uc788\ub294\uc9c0 \uc54c\ub824 \uc8fc\uc5b4\uc57c \ud55c\ub2e4. . LD_LIBRAR<\/SPAN>Y_PATH=\".\" .\/demo_dynamic <\/FONT><\/PRE>\n
      \n<\/FONT>\n
      \n
      7. \ub2e4\ub978 \ucc38\uace0 \ubb38\ud5cc \ubc0f \uc18c\uc2a4<\/FONT><\/A><\/H2>\n
      \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc5d0 \uad00\ud55c \ud2b9\ud788 \uc720\uc6a9\ud55c \uc18c\uc2a4\uc640 \uc815\ubcf4\uac00 \ub2e4\uc74c\uc758 \ubb38\uc11c\uc5d0 \uc788\ub2e4; <\/FONT>\n

1. \uac1c\uc694<\/FONT><\/A><\/H2>\n

\uc774 \ud558\uc6b0\ud22c \ubb38\uc11c\ub294 \ud504\ub85c\uadf8\ub798\uba38\uac00 \uc5b4\ub5bb\uac8c GNU\uc758 \ud234\uc14b\uc744 \uc774\uc6a9\ud558\uc5ec \ub9ac\ub205\uc2a4\uc5d0 \uc11c \ud504\ub85c\uadf8\ub7a8 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \uc0dd\uc131<\/SPAN>\ud558\uace0 \uc774\uc6a9\ud560\uc218 \uc788\ub294\uc9c0\ub97c \ub2e4\ub8ec\ub2e4. \ud504\ub85c\uadf8\ub7a8 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub780 \ub2e8\uc21c\ud558\uac8c \ubcf4\uba74 \ub098\uc911\uc5d0 \uc5b4\ub5a4 \ud504\ub85c\uadf8\ub7a8 \ucf54\ub4dc\uc5d0 \ub07c\uc6cc\ub123\uc5b4\uc9c8\uc218 \uc788\ub294 \ucef4 \ud30c\uc77c\ub41c \ucf54\ub4dc(\uadf8\ub9ac\uace0 \ub370\uc774\ud130)\uac00 \ub4e4\uc5b4\uc788\ub294 \ud30c\uc77c\uc774\uba70, \uc774\ub97c \ud1b5\ud574\uc11c \ud504\ub85c\uadf8\ub7a8\ub4e4\uc740 \ub354\uc6b1 \ubaa8\ub4c8\ud654\ub420\uc218 \uc788\uc73c\uba70, \uc7ac\ucef4\ud30c\uc77c\uc774 \ube60\ub974\uba70, \uac31\uc2e0\uc774 \uc6a9\uc774\ud574\uc9c4\ub2e4. \ud504\ub85c\uadf8\ub7a8 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub294 \uc815\uc801, \uacf5\uc720, \ub3d9\uc801<\/SPAN>(DL) \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc758 \uc138\uac00\uc9c0 \ud615\ud0dc\ub85c \ub300\ubcc4\ub41c\ub2e4. \uba3c\uc800 \ud504\ub85c\uadf8\ub7a8\uc774 \uc2e4\ud589\ub418\uae30\uc804\uc5d0 \ubbf8\ub9ac \uc2e4\ud589\ud504\ub85c\uadf8\ub7a8\uc5d0 \uc124\uce58\ub418\ub294 \uc815\uc801 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uac00 \ub2e4\ub8e8\uc5b4 \uc9c8\uac83\uc774\uba70, \uadf8 \ub2e4\uc74c\uc740 \ud504\ub85c\uadf8\ub7a8 \uc2dc\uc791\uc2dc\uc5d0 \uc801\uc7ac\ub418\uc5b4 \uc5ec\ub7ec \ud504\ub85c\uadf8 \ub7a8\uc5d0 \uc758\ud574 \uacf5\uc720\ub418\ub294 \uacf5\uc720 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>, \uadf8\ub9ac\uace0 \ub9c8\uc9c0\ub9c9\uc73c\ub85c \ud504\ub85c\uadf8\ub7a8 \uc2e4\ud589\uc911\uc758 \uc5b4\ub5a4 \uc21c\uac04\uc5d0\ub3c4 \uc801\uc7ac \ubc0f \uc0ac\uc6a9\uc774 \uac00\ub2a5\ud55c \ub3d9\uc801<\/SPAN> \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \ub2e4\ub8f0 \uac83\uc774\ub2e4. \ub3d9\uc801<\/SPAN> \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \ub2e4\ub978 \uc5b4\ub5a4 \ud55c \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc758 \ud3ec\ub9f7\uc774\ub77c\uace0 \ubcf4\uae30\ub294 \uc5b4\ub824\uc6b8 \uac83\uc774 \ub2e4.(\uc815\uc801 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc774\uac74 \uacf5\uc720 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc774\uac74 \ubaa8\ub450 \ub3d9\uc801<\/SPAN> \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub85c \uc0ac\uc6a9 \uac00\ub2a5\ud568) \ub300\uc2e0 \ub3d9\uc801<\/SPAN> \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uac00 \ub2e4\ub978\uc810\uc740 \uadf8\uac83\uc774 \ud504\ub85c\uadf8\ub798\uba38\uc5d0 \uc758\ud574\uc11c \uc774\uc6a9 \ub418\ub294 \ubc29\uc2dd\uc5d0 \uc788\ub294 \uac83\uc774\ub2e4. \uc774 \ucc45\uc758 \ub2e4\ub978 \uc7a5\uc5d0\ub294 \uadf8\uac83\uc758 \uc608\ub4e4\uacfc \ucc38\uace0\ud560 \ub9cc\ud55c \ubb38 \ud5cc\ub4e4\uc744 \uc2e4\uc744 \uac83\uc774\ub2e4. <\/FONT>\n

\uc774 \ucc45\uc740 \uc774\uc81c\ub294 \ub300\ubd80\ubd84\uc758 \ub9ac\ub205\uc2a4 \ubc30\ud3ec\ubcf8\uc5d0\uc11c \uc0ac\uc6a9\ub418\ub294 ELF \ud3ec\ub9f7\uc758 \uc2e4\ud589 \ud504\ub85c\uadf8\ub7a8\uacfc \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub9cc\uc744 \ub2e4\ub8f0 \uac83\uc774\ub2e4. GNU\uc758 gcc \ud234\uc14b\uc740 ELF\uc678\uc5d0 \ub2e4\ub978 \ud615\ud0dc\uc758 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub3c4 \ub2e4\ub8f0\uc218 \uc788\ub294\ub370 \uc544\uc9c1\ub3c4 \ub300\ubd80\ubd84\uc758 \ub9ac\ub205\uc2a4 \ubc30\ud3ec\ud310\uc740 \uc774\ubbf8 \ud1f4\ubb3c\uc774\ub41c a.out\ud615\uc758 \ud3ec\ub9f7\uc744 \ub2e4\ub8e8\uace0\ub294 \uc788\ub2e4, \ud558\uc9c0\ub9cc \uc774\uac83\uc740 \uc774\ucc45\uc758 \ubc94\uc704\ub97c \ubc97 \uc5b4\ub09c \uc598\uae30\uc774\ub2e4. <\/FONT>\n

\uc5b4\ub5a4 \uc0ac\ub78c\ub4e4\uc740 \ub3d9\uc801<\/SPAN> \ub9c1\ud06c \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>(DLL)\ub780 \uc6a9\uc5b4\ub97c \uc0ac\uc6a9\ud558\uc5ec \uacf5\uc720 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub97c \uce6d\ud558\uae30\ub3c4 \ud558\uace0, \ub54c\ub860 \uc815\uc801\uc774\uac74 \uacf5\uc720\uac74 \ub3d9\uc801<\/SPAN> \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\ub85c \uc0ac\uc6a9\ub420 \ub54c DLL\uc774\ub77c \uce6d\ud558\uae30\ub3c4 \ud558\uace0 \ub610, \ub54c\ub85c\ub294 \uc704\uc758 \ub450 \uc870\uac74\uc744 \ubaa8\ub450 \ub9cc\uc871\ud560 \ub54c DLL\uc774\ub780 \uc6a9\uc5b4\ub97c \uc4f0\uae30\ub3c4 \ud558\ub098 \uc774\uac83\uc740 \ubcc4\ub85c \uc911\uc694\ud55c \uc598\uae30\uac00 \uc544\ub2c8\ub2e4. \uc774\ubb38\uc11c\ub294 \ub2f9\uc2e0\uc774 \uc5b4 \ub5a4 \uc758\ubbf8\ub97c \uc120\ud0dd\ud558\uac74\uac04\uc5d0 \ub9ac\ub205\uc2a4\uc5d0\uc11c\uc758 DLL\uc744 \ub2e4\ub904\uc904 \uac83\uc774\ub2e4. <\/FONT>\n

\ub9cc\uc57d \uc5ec\ub7ec \uc2dc\uc2a4\ud15c\uc5d0 \ud3ec\ud305\ub420\uc218 \uc788\ub294 \ud504\ub85c\uadf8\ub7a8\uc744 \uac1c\ubc1c\ud558\ub824 \ud55c\ub2e4\uba74 LINUX Tool\uc744 \ubc14\ub85c \uc0ac\uc6a9\ud558\ub294 \uac83 \ubcf4\ub2e4\ub294 GNU Libtool\uc758 \uc0ac\uc6a9\uc744 \uace0\ub824\ud574 \ubcf4\uae38 \ubc14\ub780\ub2e4. GNU Libtool\uc740 \uacf5\uc720 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc758 \uc0ac\uc6a9(\uc0dd\uc131<\/SPAN>\uacfc \uc124\uce58\ub4f1)\uc758 \ubcf5\uc7a1\uc131\uc744 \uc77c\uad00\ub418\uace0 \uc774\uc2dd\uc801\uc778 \uc778\ud130\ud398\uc774\uc2a4\ub97c \ud1b5\ud574\uc11c \uc81c\uac70\ud574\uc8fc\ub294 \uc804\ud615\uc801\uc778 \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN> \uc9c0\uc6d0 \uc2a4\ud06c\ub9bd \ud2b8\uc774\ub2e4. \ub9ac\ub205\uc2a4\uc5d0\uc11c GNU Libtool\uc740 Tool\ub4e4\uc911\uc5d0\uc11c \ucd5c\uc0c1\uc704\uc5d0 \uad6c\ud604\ub418\uc5b4 \uc788\uc73c\uba70 \uadf8 \uc0ac\uc6a9\uad00\ub840\ub3c4 \uc774 \ud558\uc6b0\ud22c \ubb38\uc11c\uc5d0 \uae30\uc220\ub418\uc5b4\uc788\ub2e4. DL \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc758 \uc774\uc2dd\uac00\ub2a5 \ud55c \uc778\ud130\ud398\uc774\uc2a4 \uad6c\ud604\uc744 \uc704\ud574\uc11c\ub294 \uc5ec\ub7ec\uac00\uc9c0 \uc774\uc2dd\uc131 \uad6c\ud604\uc7a5\uce58\uac00 \uc788\uc73c\uba70 \uadf8 \uc911 GNU Libtool \uc740 \"Libltdl\" \uc774 \ud3ec\ud568\ub418\uc5b4 \uc788\ub2e4. \ub2e4\ub978 \uc120\ud0dd\uc73c\ub85c\ub294 glib \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN> (glibc\uc640 \ud63c\ub3d9\ud558\uc9c0\ub9d0\uac83)\uc758 \ub3d9\uc801<\/SPAN> \ubaa8\ub4c8 \uc801\uc7ac\uc758 \uc774\uc2dd\uc131\uc9c0\uc6d0\uae30\ub2a5\uc744 \uc0ac\uc6a9\ud560\uc218 \uc788\ub2e4. \uadf8\uac83\uc744 \uc0ac\uc6a9\ud558\ub824 \ud55c\ub2e4\uba74 \uc774 \ubb38\uc11c\ub9d0\uace0 [10] <\/FONT>developer.gnome.org\/doc\/API\/glib\/glib-dynamic-loading-of-modules.html<\/FONT><\/A> \uc5d0\uc11c \ubcf4\uae38 \ubc14\ub780\ub2e4. \ub2e4\uc2dc \ud55c\ubc88 \ub9d0 \ud558\uac74\ub370 \ub9ac\ub205\uc2a4\uc5d0\uc11c \ub77c\uc774\ube0c\ub7ec\ub9ac<\/SPAN>\uc758 \uc0ac\uc6a9\uc5d0 \uad00\ud55c \uc81c\ubc18 \uae30\ub2a5\ub4e4\uc758 \uad6c\ud604\uc774 \uc774 \ubb38\uc11c \uc5d0\uc11c \uae30\uc220\ub420 \uac83\uc774\uba70 \ub9ac\ub205\uc2a4\uc6a9 \ucf54\ub4dc\ub97c \uac1c\ubc1c\uc911\uc774\uac70\ub098 \ub514\ubc84\uae45 \uc911\uc774\ub77c\uba74 \uc774\ubb38\uc11c\uc758 \ub0b4\uc6a9\uc774 \uc720\uc6a9\ud560\uac83\uc774\ub2e4. \uc774 \ud558\uc6b0\ud22c \ubb38\uc11c\uc758 \uba54\uc778\uc8fc\uc18c\ub294 [11] <\/FONT>www.dwheeler.com\/program-librar<\/SPAN>y<\/FONT><\/A> \uc774\uba70 LDP([12] <\/FONT>http:\/\/www.linuxdoc.org<\/FONT><\/A>)\uc5d0 \uc81c\uacf5\ub41c\ub2e4. \uc800\uc791\uad8c\uc790\ub294 David A. Wheeler\uc774\uba70 GPL\uc758 \ub77c\uc774\uc13c\uc2a4\ub97c \ub530\ub978\ub2e4. <\/FONT>\n