version 1.1, 2012/02/21 22:57:49
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version 1.1.1.2, 2012/05/29 09:29:44
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# readlink.m4 serial 5 | # readlink.m4 serial 11 |
dnl Copyright (C) 2003, 2007, 2009 Free Software Foundation, Inc. | dnl Copyright (C) 2003, 2007, 2009-2011 Free Software Foundation, Inc. |
dnl This file is free software; the Free Software Foundation |
dnl This file is free software; the Free Software Foundation |
dnl gives unlimited permission to copy and/or distribute it, |
dnl gives unlimited permission to copy and/or distribute it, |
dnl with or without modifications, as long as this notice is preserved. |
dnl with or without modifications, as long as this notice is preserved. |
Line 10 AC_DEFUN([gl_FUNC_READLINK],
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Line 10 AC_DEFUN([gl_FUNC_READLINK],
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AC_CHECK_FUNCS_ONCE([readlink]) |
AC_CHECK_FUNCS_ONCE([readlink]) |
if test $ac_cv_func_readlink = no; then |
if test $ac_cv_func_readlink = no; then |
HAVE_READLINK=0 |
HAVE_READLINK=0 |
AC_LIBOBJ([readlink]) | else |
gl_PREREQ_READLINK | AC_CACHE_CHECK([whether readlink signature is correct], |
| [gl_cv_decl_readlink_works], |
| [AC_COMPILE_IFELSE( |
| [AC_LANG_PROGRAM( |
| [[#include <unistd.h> |
| /* Cause compilation failure if original declaration has wrong type. */ |
| ssize_t readlink (const char *, char *, size_t);]])], |
| [gl_cv_decl_readlink_works=yes], [gl_cv_decl_readlink_works=no])]) |
| dnl Solaris 9 ignores trailing slash. |
| dnl FreeBSD 7.2 dereferences only one level of links with trailing slash. |
| AC_CACHE_CHECK([whether readlink handles trailing slash correctly], |
| [gl_cv_func_readlink_works], |
| [# We have readlink, so assume ln -s works. |
| ln -s conftest.no-such conftest.link |
| ln -s conftest.link conftest.lnk2 |
| AC_RUN_IFELSE( |
| [AC_LANG_PROGRAM( |
| [[#include <unistd.h> |
| ]], [[char buf[20]; |
| return readlink ("conftest.lnk2/", buf, sizeof buf) != -1;]])], |
| [gl_cv_func_readlink_works=yes], [gl_cv_func_readlink_works=no], |
| [gl_cv_func_readlink_works="guessing no"]) |
| rm -f conftest.link conftest.lnk2]) |
| if test "$gl_cv_func_readlink_works" != yes; then |
| AC_DEFINE([READLINK_TRAILING_SLASH_BUG], [1], [Define to 1 if readlink |
| fails to recognize a trailing slash.]) |
| REPLACE_READLINK=1 |
| elif test "$gl_cv_decl_readlink_works" != yes; then |
| REPLACE_READLINK=1 |
| fi |
fi |
fi |
]) |
]) |
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# Like gl_FUNC_READLINK, except prepare for separate compilation (no AC_LIBOBJ). | # Like gl_FUNC_READLINK, except prepare for separate compilation |
| # (no REPLACE_READLINK, no AC_LIBOBJ). |
AC_DEFUN([gl_FUNC_READLINK_SEPARATE], |
AC_DEFUN([gl_FUNC_READLINK_SEPARATE], |
[ |
[ |
AC_CHECK_FUNCS_ONCE([readlink]) |
AC_CHECK_FUNCS_ONCE([readlink]) |