X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=m4%2Fstat.m4;h=d762cba24ee0a1a62ff26c3ba1ad23e0de8464a4;hb=a2f84200a3642c51afc3fad750ea264ac120bcd1;hp=acd32d86a084ea6cbfcbd47bf1c3a756b94ccf61;hpb=a2016c1de6e4884f6c8ed5cc498f3bf821c25ca4;p=debian%2Fgzip

diff --git a/m4/stat.m4 b/m4/stat.m4
index acd32d8..d762cba 100644
--- a/m4/stat.m4
+++ b/m4/stat.m4
@@ -1,6 +1,6 @@
-# serial 4
+# serial 14
 
-# Copyright (C) 2009, 2010 Free Software Foundation, Inc.
+# 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,
@@ -8,56 +8,65 @@
 
 AC_DEFUN([gl_FUNC_STAT],
 [
-  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
-  AC_REQUIRE([gl_AC_DOS])
+  AC_REQUIRE([AC_CANONICAL_HOST])
   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],
-      [AC_RUN_IFELSE(
-         [AC_LANG_PROGRAM(
-           [[#include <sys/stat.h>
-]], [[struct stat st; return stat (".", &st) != stat ("./", &st);]])],
-         [gl_cv_func_stat_dir_slash=yes], [gl_cv_func_stat_dir_slash=no],
-         [case $host_os in
-            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 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 $ac_cv_func_lstat = yes; then
-         ln -s conftest.tmp conftest.lnk
-       fi
-       AC_RUN_IFELSE(
-         [AC_LANG_PROGRAM(
-           [[#include <sys/stat.h>
-]], [[struct stat st;
-      if (!stat ("conftest.tmp/", &st)) return 1;
+  case "$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)) return 2;
+               if (!stat ("conftest.lnk/", &st))
+                 result |= 2;
 #endif
-           ]])],
-         [gl_cv_func_stat_file_slash=yes], [gl_cv_func_stat_file_slash=no],
-         [gl_cv_func_stat_file_slash="guessing no"])
-       rm -f conftest.tmp conftest.lnk])
-  case $gl_cv_func_stat_dir_slash in
-    *no) REPLACE_STAT=1
-      AC_DEFINE([REPLACE_FUNC_STAT_DIR], [1], [Define to 1 if stat needs
-        help when passed a directory name with a trailing slash]);;
+               return result;
+             ]])],
+           [gl_cv_func_stat_file_slash=yes], [gl_cv_func_stat_file_slash=no],
+           [case "$host_os" in
+                             # Guess yes on glibc systems.
+              *-gnu* | 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
-  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
-  if test $REPLACE_STAT = 1; then
-    AC_LIBOBJ([stat])
-    dnl Prerequisites of lib/stat.c.
-    AC_REQUIRE([AC_C_INLINE])
-  fi
+])
+
+# Prerequisites of lib/stat.c and lib/stat-w32.c.
+AC_DEFUN([gl_PREREQ_STAT], [
+  AC_REQUIRE([gl_HEADER_SYS_STAT_H])
+  :
 ])