quotearg: don't attempt to store 1 << 31 into an "int"

[gnulib.git] / m4 / stat.m4

diff --git a/m4/stat.m4 b/m4/stat.m4
index 9cc0b4a..2456297 100644 (file)
--- a/m4/stat.m4
+++ b/m4/stat.m4
@@ -1,6 +1,6 @@
-# serial 1
+# serial 11
 
-# Copyright (C) 2009 Free Software Foundation, Inc.
+# Copyright (C) 2009-2013 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@@ -9,23 +9,63 @@
 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],
-      [gl_cv_func_stat_works],
+  AC_CACHE_CHECK([whether stat handles trailing slashes on directories],
+      [gl_cv_func_stat_dir_slash],
       [AC_RUN_IFELSE(
          [AC_LANG_PROGRAM(
            [[#include <sys/stat.h>
 ]], [[struct stat st; return stat (".", &st) != stat ("./", &st);]])],
-         [gl_cv_func_stat_works=yes], [gl_cv_func_stat_works=no],
+         [gl_cv_func_stat_dir_slash=yes], [gl_cv_func_stat_dir_slash=no],
          [case $host_os in
-            mingw*) gl_cv_func_stat_works="guessing no";;
-            *) gl_cv_func_stat_works="guessing yes";;
+            mingw*) gl_cv_func_stat_dir_slash="guessing no";;
+            *) gl_cv_func_stat_dir_slash="guessing yes";;
           esac])])
-  case $gl_cv_func_stat_works in
-    *yes) ;;
-    *) REPLACE_STAT=1
-       AC_LIBOBJ([stat]);;
+  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 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
+        help when passed a directory name with a trailing slash]);;
+  esac
+  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
 ])
+
+# Prerequisites of lib/stat.c.
+AC_DEFUN([gl_PREREQ_STAT], [:])