maint: update copyright

[gnulib.git] / m4 / stat.m4

diff --git a/m4/stat.m4 b/m4/stat.m4
index 0a10de1..1ae327b 100644 (file)
--- a/m4/stat.m4
+++ b/m4/stat.m4
@@ -1,6 +1,6 @@
-# serial 2
+# serial 11
 
-# Copyright (C) 2009 Free Software Foundation, Inc.
+# Copyright (C) 2009-2014 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@@ -9,8 +9,8 @@
 AC_DEFUN([gl_FUNC_STAT],
 [
   AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
-  AC_REQUIRE([gl_AC_DOS])
   AC_REQUIRE([gl_SYS_STAT_H_DEFAULTS])
+  AC_CHECK_FUNCS_ONCE([lstat])
   dnl mingw is the only known platform where stat(".") and stat("./") differ
   AC_CACHE_CHECK([whether stat handles trailing slashes on directories],
       [gl_cv_func_stat_dir_slash],
@@ -23,16 +23,38 @@ AC_DEFUN([gl_FUNC_STAT],
             mingw*) gl_cv_func_stat_dir_slash="guessing no";;
             *) gl_cv_func_stat_dir_slash="guessing yes";;
           esac])])
-  dnl Solaris 9 mistakenly succeeds on stat("file/")
+  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 $ac_cv_func_lstat = yes; then
+         ln -s conftest.tmp conftest.lnk
+       fi
        AC_RUN_IFELSE(
          [AC_LANG_PROGRAM(
            [[#include <sys/stat.h>
-]], [[struct stat st; return !stat ("conftest.tmp/", &st);]])],
+]], [[int result = 0;
+      struct stat st;
+      if (!stat ("conftest.tmp/", &st))
+        result |= 1;
+#if HAVE_LSTAT
+      if (!stat ("conftest.lnk/", &st))
+        result |= 2;
+#endif
+      return result;
+           ]])],
          [gl_cv_func_stat_file_slash=yes], [gl_cv_func_stat_file_slash=no],
-         [gl_cv_func_stat_file_slash="guessing no"])])
+         [case "$host_os" in
+                    # Guess yes on glibc systems.
+            *-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_dir_slash in
     *no) REPLACE_STAT=1
       AC_DEFINE([REPLACE_FUNC_STAT_DIR], [1], [Define to 1 if stat needs
@@ -43,7 +65,7 @@ AC_DEFUN([gl_FUNC_STAT],
       AC_DEFINE([REPLACE_FUNC_STAT_FILE], [1], [Define to 1 if stat needs
         help when passed a file name with a trailing slash]);;
   esac
-  if test $REPLACE_STAT = 1; then
-    AC_LIBOBJ([stat])
-  fi
 ])
+
+# Prerequisites of lib/stat.c.
+AC_DEFUN([gl_PREREQ_STAT], [:])