# serial 15

# Copyright (C) 2009-2018 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.

AC_DEFUN([gl_FUNC_STAT],

[

  AC_REQUIRE([AC_CANONICAL_HOST])

  AC_REQUIRE([gl_SYS_STAT_H_DEFAULTS])

  AC_CHECK_FUNCS_ONCE([lstat])

  case "$host_os" in

    mingw*)

      dnl On this platform, the original stat() returns st_atime, st_mtime,

      dnl st_ctime values that are affected by the time zone.

      REPLACE_STAT=1

      ;;

    *)

      dnl AIX 7.1, Solaris 9, mingw64 mistakenly succeed on stat("file/").

      dnl (For mingw, this is due to a broken stat() override in libmingwex.a.)

      dnl FreeBSD 7.2 mistakenly succeeds on stat("link-to-file/").

      AC_CACHE_CHECK([whether stat handles trailing slashes on files],

        [gl_cv_func_stat_file_slash],

        [touch conftest.tmp

         # Assume that if we have lstat, we can also check symlinks.

         if test $ac_cv_func_lstat = yes; then

           ln -s conftest.tmp conftest.lnk

         fi

         AC_RUN_IFELSE(

           [AC_LANG_PROGRAM(

             [[#include <sys/stat.h>

]], [[int result = 0;

               struct stat st;

               if (!stat ("conftest.tmp/", &st))

                 result |= 1;

#if HAVE_LSTAT

               if (!stat ("conftest.lnk/", &st))

                 result |= 2;

#endif

               return result;

             ]])],

           [gl_cv_func_stat_file_slash=yes], [gl_cv_func_stat_file_slash=no],

           [case "$host_os" in

                               # Guess yes on Linux systems.

              linux-* | linux) gl_cv_func_stat_file_slash="guessing yes" ;;

                               # Guess yes on glibc systems.

              *-gnu* | gnu*)   gl_cv_func_stat_file_slash="guessing yes" ;;

                               # If we don't know, assume the worst.

              *)               gl_cv_func_stat_file_slash="guessing no" ;;

            esac

           ])

         rm -f conftest.tmp conftest.lnk])

      case $gl_cv_func_stat_file_slash in

        *no)

          REPLACE_STAT=1

          AC_DEFINE([REPLACE_FUNC_STAT_FILE], [1], [Define to 1 if stat needs

            help when passed a file name with a trailing slash]);;

      esac

      case $host_os in

        dnl Solaris stat can return a negative tv_nsec.

        solaris*)

          REPLACE_FSTAT=1 ;;

      esac

      ;;

  esac

])

# Prerequisites of lib/stat.c and lib/stat-w32.c.

AC_DEFUN([gl_PREREQ_STAT], [

  AC_REQUIRE([gl_HEADER_SYS_STAT_H])

  :

])