| 1 | # serial 6 |
| 2 | # See if we need to provide symlink replacement. |
| 3 | |
| 4 | dnl Copyright (C) 2009-2014 Free Software Foundation, Inc. |
| 5 | dnl This file is free software; the Free Software Foundation |
| 6 | dnl gives unlimited permission to copy and/or distribute it, |
| 7 | dnl with or without modifications, as long as this notice is preserved. |
| 8 | |
| 9 | # Written by Eric Blake. |
| 10 | |
| 11 | AC_DEFUN([gl_FUNC_SYMLINK], |
| 12 | [ |
| 13 | AC_REQUIRE([gl_UNISTD_H_DEFAULTS]) |
| 14 | AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles |
| 15 | AC_CHECK_FUNCS_ONCE([symlink]) |
| 16 | dnl The best we can do on mingw is provide a dummy that always fails, so |
| 17 | dnl that compilation can proceed with fewer ifdefs. On FreeBSD 7.2, AIX 7.1, |
| 18 | dnl and Solaris 9, we want to fix a bug with trailing slash handling. |
| 19 | if test $ac_cv_func_symlink = no; then |
| 20 | HAVE_SYMLINK=0 |
| 21 | else |
| 22 | AC_CACHE_CHECK([whether symlink handles trailing slash correctly], |
| 23 | [gl_cv_func_symlink_works], |
| 24 | [AC_RUN_IFELSE( |
| 25 | [AC_LANG_PROGRAM( |
| 26 | [[#include <unistd.h> |
| 27 | ]], |
| 28 | [[int result = 0; |
| 29 | if (!symlink ("a", "conftest.link/")) |
| 30 | result |= 1; |
| 31 | if (symlink ("conftest.f", "conftest.lnk2")) |
| 32 | result |= 2; |
| 33 | else if (!symlink ("a", "conftest.lnk2/")) |
| 34 | result |= 4; |
| 35 | return result; |
| 36 | ]])], |
| 37 | [gl_cv_func_symlink_works=yes], [gl_cv_func_symlink_works=no], |
| 38 | [case "$host_os" in |
| 39 | # Guess yes on glibc systems. |
| 40 | *-gnu*) gl_cv_func_symlink_works="guessing yes" ;; |
| 41 | # If we don't know, assume the worst. |
| 42 | *) gl_cv_func_symlink_works="guessing no" ;; |
| 43 | esac |
| 44 | ]) |
| 45 | rm -f conftest.f conftest.link conftest.lnk2]) |
| 46 | case "$gl_cv_func_symlink_works" in |
| 47 | *yes) ;; |
| 48 | *) |
| 49 | REPLACE_SYMLINK=1 |
| 50 | ;; |
| 51 | esac |
| 52 | fi |
| 53 | ]) |