| # serial 33 |
| |
| # Copyright (C) 1997-2001, 2003-2021 Free Software Foundation, Inc. |
| # |
| # This file is free software; the Free Software Foundation |
| # gives unlimited permission to copy and/or distribute it, |
| # with or without modifications, as long as this notice is preserved. |
| |
| dnl From Jim Meyering. |
| |
| AC_DEFUN([gl_FUNC_LSTAT], |
| [ |
| AC_REQUIRE([AC_CANONICAL_HOST]) |
| AC_REQUIRE([gl_SYS_STAT_H_DEFAULTS]) |
| dnl If lstat does not exist, the replacement <sys/stat.h> does |
| dnl "#define lstat stat", and lstat.c is a no-op. |
| AC_CHECK_FUNCS_ONCE([lstat]) |
| if test $ac_cv_func_lstat = yes; then |
| AC_REQUIRE([gl_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK]) |
| case $host_os,$gl_cv_func_lstat_dereferences_slashed_symlink in |
| solaris* | *no) |
| REPLACE_LSTAT=1 |
| ;; |
| esac |
| else |
| HAVE_LSTAT=0 |
| fi |
| ]) |
| |
| # Prerequisites of lib/lstat.c. |
| AC_DEFUN([gl_PREREQ_LSTAT], [:]) |
| |
| AC_DEFUN([gl_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK], |
| [ |
| dnl We don't use AC_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK any more, because it |
| dnl is no longer maintained in Autoconf and because it invokes AC_LIBOBJ. |
| AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles |
| AC_CACHE_CHECK([whether lstat correctly handles trailing slash], |
| [gl_cv_func_lstat_dereferences_slashed_symlink], |
| [rm -f conftest.sym conftest.file |
| echo >conftest.file |
| AC_RUN_IFELSE( |
| [AC_LANG_PROGRAM( |
| [AC_INCLUDES_DEFAULT], |
| [[struct stat sbuf; |
| if (symlink ("conftest.file", "conftest.sym") != 0) |
| return 1; |
| /* Linux will dereference the symlink and fail, as required by |
| POSIX. That is better in the sense that it means we will not |
| have to compile and use the lstat wrapper. */ |
| return lstat ("conftest.sym/", &sbuf) == 0; |
| ]])], |
| [gl_cv_func_lstat_dereferences_slashed_symlink=yes], |
| [gl_cv_func_lstat_dereferences_slashed_symlink=no], |
| [case "$host_os" in |
| linux-* | linux) |
| # Guess yes on Linux systems. |
| gl_cv_func_lstat_dereferences_slashed_symlink="guessing yes" ;; |
| *-gnu* | gnu*) |
| # Guess yes on glibc systems. |
| gl_cv_func_lstat_dereferences_slashed_symlink="guessing yes" ;; |
| mingw*) |
| # Guess no on native Windows. |
| gl_cv_func_lstat_dereferences_slashed_symlink="guessing no" ;; |
| *) |
| # If we don't know, obey --enable-cross-guesses. |
| gl_cv_func_lstat_dereferences_slashed_symlink="$gl_cross_guess_normal" ;; |
| esac |
| ]) |
| rm -f conftest.sym conftest.file |
| ]) |
| case "$gl_cv_func_lstat_dereferences_slashed_symlink" in |
| *yes) |
| AC_DEFINE_UNQUOTED([LSTAT_FOLLOWS_SLASHED_SYMLINK], [1], |
| [Define to 1 if 'lstat' dereferences a symlink specified |
| with a trailing slash.]) |
| ;; |
| esac |
| ]) |
