Commit | Line | Data |
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af07e104 | 1 | # serial 26 |
8912421c | 2 | |
5e69ceb7 | 3 | # Copyright (C) 1997-2001, 2003-2014 Free Software Foundation, Inc. |
8912421c LC |
4 | # |
5 | # This file is free software; the Free Software Foundation | |
6 | # gives unlimited permission to copy and/or distribute it, | |
7 | # with or without modifications, as long as this notice is preserved. | |
8 | ||
9 | dnl From Jim Meyering. | |
10 | ||
11 | AC_DEFUN([gl_FUNC_LSTAT], | |
12 | [ | |
13 | AC_REQUIRE([gl_SYS_STAT_H_DEFAULTS]) | |
14 | dnl If lstat does not exist, the replacement <sys/stat.h> does | |
15 | dnl "#define lstat stat", and lstat.c is a no-op. | |
16 | AC_CHECK_FUNCS_ONCE([lstat]) | |
17 | if test $ac_cv_func_lstat = yes; then | |
231c0e0e | 18 | AC_REQUIRE([gl_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK]) |
005de2e8 LC |
19 | case "$gl_cv_func_lstat_dereferences_slashed_symlink" in |
20 | *no) | |
21 | REPLACE_LSTAT=1 | |
22 | ;; | |
23 | esac | |
8912421c LC |
24 | else |
25 | HAVE_LSTAT=0 | |
26 | fi | |
27 | ]) | |
0f00f2c3 | 28 | |
3d458a81 | 29 | # Prerequisites of lib/lstat.c. |
af07e104 | 30 | AC_DEFUN([gl_PREREQ_LSTAT], [:]) |
3d458a81 AW |
31 | |
32 | AC_DEFUN([gl_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK], | |
33 | [ | |
34 | dnl We don't use AC_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK any more, because it | |
35 | dnl is no longer maintained in Autoconf and because it invokes AC_LIBOBJ. | |
0f00f2c3 | 36 | AC_CACHE_CHECK([whether lstat correctly handles trailing slash], |
3d458a81 | 37 | [gl_cv_func_lstat_dereferences_slashed_symlink], |
0f00f2c3 LC |
38 | [rm -f conftest.sym conftest.file |
39 | echo >conftest.file | |
40 | if test "$as_ln_s" = "ln -s" && ln -s conftest.file conftest.sym; then | |
41 | AC_RUN_IFELSE( | |
42 | [AC_LANG_PROGRAM( | |
43 | [AC_INCLUDES_DEFAULT], | |
44 | [[struct stat sbuf; | |
45 | /* Linux will dereference the symlink and fail, as required by | |
46 | POSIX. That is better in the sense that it means we will not | |
47 | have to compile and use the lstat wrapper. */ | |
48 | return lstat ("conftest.sym/", &sbuf) == 0; | |
49 | ]])], | |
3d458a81 AW |
50 | [gl_cv_func_lstat_dereferences_slashed_symlink=yes], |
51 | [gl_cv_func_lstat_dereferences_slashed_symlink=no], | |
005de2e8 LC |
52 | [case "$host_os" in |
53 | # Guess yes on glibc systems. | |
54 | *-gnu*) gl_cv_func_lstat_dereferences_slashed_symlink="guessing yes" ;; | |
55 | # If we don't know, assume the worst. | |
56 | *) gl_cv_func_lstat_dereferences_slashed_symlink="guessing no" ;; | |
57 | esac | |
0f00f2c3 LC |
58 | ]) |
59 | else | |
60 | # If the 'ln -s' command failed, then we probably don't even | |
61 | # have an lstat function. | |
005de2e8 | 62 | gl_cv_func_lstat_dereferences_slashed_symlink="guessing no" |
0f00f2c3 LC |
63 | fi |
64 | rm -f conftest.sym conftest.file | |
65 | ]) | |
005de2e8 LC |
66 | case "$gl_cv_func_lstat_dereferences_slashed_symlink" in |
67 | *yes) | |
68 | AC_DEFINE_UNQUOTED([LSTAT_FOLLOWS_SLASHED_SYMLINK], [1], | |
69 | [Define to 1 if 'lstat' dereferences a symlink specified | |
70 | with a trailing slash.]) | |
71 | ;; | |
72 | esac | |
0f00f2c3 | 73 | ]) |