| 1 | # serial 5
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| 2 | # See if we need to provide symlink replacement.
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| 3 |
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| 4 | dnl Copyright (C) 2009-2012 Free Software Foundation, Inc.
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| 5 | dnl This file is free software; the Free Software Foundation
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| 6 | dnl gives unlimited permission to copy and/or distribute it,
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| 7 | dnl with or without modifications, as long as this notice is preserved.
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| 8 |
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| 9 | # Written by Eric Blake.
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| 10 |
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| 11 | AC_DEFUN([gl_FUNC_SYMLINK],
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| 12 | [
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| 13 | AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
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| 14 | AC_CHECK_FUNCS_ONCE([symlink])
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| 15 | dnl The best we can do on mingw is provide a dummy that always fails, so
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| 16 | dnl that compilation can proceed with fewer ifdefs. On FreeBSD 7.2, AIX 7.1,
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| 17 | dnl and Solaris 9, we want to fix a bug with trailing slash handling.
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| 18 | if test $ac_cv_func_symlink = no; then
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| 19 | HAVE_SYMLINK=0
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| 20 | else
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| 21 | AC_CACHE_CHECK([whether symlink handles trailing slash correctly],
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| 22 | [gl_cv_func_symlink_works],
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| 23 | [AC_RUN_IFELSE(
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| 24 | [AC_LANG_PROGRAM(
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| 25 | [[#include <unistd.h>
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| 26 | ]],
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| 27 | [[int result = 0;
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| 28 | if (!symlink ("a", "conftest.link/"))
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| 29 | result |= 1;
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| 30 | if (symlink ("conftest.f", "conftest.lnk2"))
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| 31 | result |= 2;
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| 32 | else if (!symlink ("a", "conftest.lnk2/"))
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| 33 | result |= 4;
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| 34 | return result;
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| 35 | ]])],
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| 36 | [gl_cv_func_symlink_works=yes], [gl_cv_func_symlink_works=no],
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| 37 | [gl_cv_func_symlink_works="guessing no"])
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| 38 | rm -f conftest.f conftest.link conftest.lnk2])
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| 39 | if test "$gl_cv_func_symlink_works" != yes; then
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| 40 | REPLACE_SYMLINK=1
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| 41 | fi
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| 42 | fi
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| 43 | ])
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