Imported Upstream version 1.4

[debian/gzip] / m4 / fcntl_h.m4

diff --git a/m4/fcntl_h.m4 b/m4/fcntl_h.m4
index 9846b2f313b3818af1a9bbdaf52358a8d7fc095f..048a9fcb9deee7e81092e90a2e074d9866e4e89f 100644 (file)
--- a/m4/fcntl_h.m4
+++ b/m4/fcntl_h.m4
@@ -1,5 +1,6 @@
+# serial 9
 # Configure fcntl.h.
-dnl Copyright (C) 2006 Free Software Foundation, Inc.
+dnl Copyright (C) 2006, 2007, 2009, 2010 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -8,74 +9,27 @@ dnl Written by Paul Eggert.
 
 AC_DEFUN([gl_FCNTL_H],
 [
-  AC_CACHE_CHECK([for working fcntl.h], gl_cv_header_working_fcntl_h,
-    [AC_RUN_IFELSE(
-       [AC_LANG_PROGRAM(
-         [[#include <sys/types.h>
-          #include <sys/stat.h>
-          #include <unistd.h>
-          #include <fcntl.h>
-          #ifndef O_NOATIME
-           #define O_NOATIME 0
-          #endif
-          #ifndef O_NOFOLLOW
-           #define O_NOFOLLOW 0
-          #endif
-          static int const constants[] =
-           {
-             O_CREAT, O_EXCL, O_NOCTTY, O_TRUNC, O_APPEND,
-             O_NONBLOCK, O_SYNC, O_ACCMODE, O_RDONLY, O_RDWR, O_WRONLY
-           };
-         ]],
-         [[
-           int status = !constants;
-           {
-             static char const sym[] = "conftest.sym";
-             if (symlink (".", sym) != 0
-                 || close (open (sym, O_RDONLY | O_NOFOLLOW)) == 0)
-               status |= 32;
-           }
-           {
-             static char const file[] = "confdefs.h";
-             int fd = open (file, O_RDONLY | O_NOATIME);
-             char c;
-             struct stat st0, st1;
-             if (fd < 0
-                 || fstat (fd, &st0) != 0
-                 || sleep (1) != 0
-                 || read (fd, &c, 1) != 1
-                 || close (fd) != 0
-                 || stat (file, &st1) != 0
-                 || st0.st_atime != st1.st_atime)
-               status |= 64;
-           }
-           return status;]])],
-       [gl_cv_header_working_fcntl_h=yes],
-       [case $? in #(
-       32) gl_cv_header_working_fcntl_h='no (bad O_NOFOLLOW)';; #(
-       64) gl_cv_header_working_fcntl_h='no (bad O_NOATIME)';; #(
-       96) gl_cv_header_working_fcntl_h='no (bad O_NOATIME, O_NOFOLLOW)';; #(
-        *) gl_cv_header_working_fcntl_h='no';;
-       esac],
-       [gl_cv_header_working_fcntl_h=cross-compiling])])
-
-  case $gl_cv_header_working_fcntl_h in #(
-  *O_NOATIME* | no | cross-compiling) ac_val=0;; #(
-  *) ac_val=1;;
-  esac
-  AC_DEFINE_UNQUOTED([HAVE_WORKING_O_NOATIME], [$ac_val],
-    [Define to 1 if O_NOATIME works.])
+  AC_REQUIRE([gl_FCNTL_H_DEFAULTS])
+  AC_REQUIRE([gl_FCNTL_O_FLAGS])
+  gl_CHECK_NEXT_HEADERS([fcntl.h])
+])
 
-  case $gl_cv_header_working_fcntl_h in #(
-  *O_NOFOLLOW* | no | cross-compiling) ac_val=0;; #(
-  *) ac_val=1;;
-  esac
-  AC_DEFINE_UNQUOTED([HAVE_WORKING_O_NOFOLLOW], [$ac_val],
-    [Define to 1 if O_NOFOLLOW works.])
+AC_DEFUN([gl_FCNTL_MODULE_INDICATOR],
+[
+  dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
+  AC_REQUIRE([gl_FCNTL_H_DEFAULTS])
+  GNULIB_[]m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___])=1
+])
 
-  gl_ABSOLUTE_HEADER([fcntl.h])
-  ABSOLUTE_FCNTL_H=\"$gl_cv_absolute_fcntl_h\"
-  AC_SUBST([ABSOLUTE_FCNTL_H])
-  FCNTL_H='fcntl.h'
-  AC_SUBST([FCNTL_H])
+AC_DEFUN([gl_FCNTL_H_DEFAULTS],
+[
+  GNULIB_FCNTL=0;   AC_SUBST([GNULIB_FCNTL])
+  GNULIB_OPEN=0;    AC_SUBST([GNULIB_OPEN])
+  GNULIB_OPENAT=0;  AC_SUBST([GNULIB_OPENAT])
+  dnl Assume proper GNU behavior unless another module says otherwise.
+  HAVE_FCNTL=1;     AC_SUBST([HAVE_FCNTL])
+  HAVE_OPENAT=1;    AC_SUBST([HAVE_OPENAT])
+  REPLACE_FCNTL=0;  AC_SUBST([REPLACE_FCNTL])
+  REPLACE_OPEN=0;   AC_SUBST([REPLACE_OPEN])
+  REPLACE_OPENAT=0; AC_SUBST([REPLACE_OPENAT])
 ])