mbrlen: Fix cross-compilation guess for AIX.

[gnulib.git] / m4 / mkstemp.m4

diff --git a/m4/mkstemp.m4 b/m4/mkstemp.m4
index 82e1ce5..d6430a9 100644 (file)
--- a/m4/mkstemp.m4
+++ b/m4/mkstemp.m4
@@ -1,4 +1,9 @@
-#serial 6
+#serial 18
+
+# Copyright (C) 2001, 2003-2007, 2009-2010 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.
 
 # On some hosts (e.g., HP-UX 10.20, SunOS 4.1.4, Solaris 2.5.1), mkstemp has a
 # silly limit that it can create no more than 26 files from a given template.
@@ -7,45 +12,47 @@
 # only 32 files per process.
 # On systems like the above, arrange to use the replacement function.
 AC_DEFUN([gl_FUNC_MKSTEMP],
-[dnl
-  AC_REPLACE_FUNCS(mkstemp)
-  if test $ac_cv_func_mkstemp = no; then
-    gl_cv_func_mkstemp_limitations=yes
-  else
-    AC_CACHE_CHECK([for mkstemp limitations],
-      gl_cv_func_mkstemp_limitations,
-      [
-       AC_TRY_RUN([
-#         include <stdlib.h>
-         int main ()
-         {
-           int i;
-           for (i = 0; i < 70; i++)
-             {
-               char template[] = "conftestXXXXXX";
-               int fd = mkstemp (template);
-               if (fd == -1)
-                 exit (1);
-               close (fd);
-             }
-           exit (0);
-         }
-         ],
-       gl_cv_func_mkstemp_limitations=no,
-       gl_cv_func_mkstemp_limitations=yes,
-       gl_cv_func_mkstemp_limitations=yes
-       )
-      ]
-    )
-  fi
+[
+  AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+  AC_REQUIRE([AC_SYS_LARGEFILE])
 
-  if test $gl_cv_func_mkstemp_limitations = yes; then
-    AC_LIBOBJ(mkstemp)
-    AC_LIBOBJ(tempname)
-    AC_DEFINE(mkstemp, rpl_mkstemp,
-      [Define to rpl_mkstemp if the replacement function should be used.])
+  AC_CHECK_FUNCS_ONCE([mkstemp])
+  if test $ac_cv_func_mkstemp = yes; then
+    AC_CACHE_CHECK([for working mkstemp],
+      [gl_cv_func_working_mkstemp],
+      [
+        mkdir conftest.mkstemp
+        AC_RUN_IFELSE(
+          [AC_LANG_PROGRAM(
+            [AC_INCLUDES_DEFAULT],
+            [[int i;
+              off_t large = (off_t) 4294967295u;
+              if (large < 0)
+                large = 2147483647;
+              for (i = 0; i < 70; i++)
+                {
+                  char templ[] = "conftest.mkstemp/coXXXXXX";
+                  int (*mkstemp_function) (char *) = mkstemp;
+                  int fd = mkstemp_function (templ);
+                  if (fd < 0 || lseek (fd, large, SEEK_SET) != large)
+                    return 1;
+                  close (fd);
+                }
+              return 0;]])],
+          [gl_cv_func_working_mkstemp=yes],
+          [gl_cv_func_working_mkstemp=no],
+          [gl_cv_func_working_mkstemp=no])
+        rm -rf conftest.mkstemp
+      ])
+    if test $gl_cv_func_working_mkstemp != yes; then
+      REPLACE_MKSTEMP=1
+      AC_LIBOBJ([mkstemp])
+      gl_PREREQ_MKSTEMP
+    fi
+  else
+    HAVE_MKSTEMP=0
+    AC_LIBOBJ([mkstemp])
     gl_PREREQ_MKSTEMP
-    gl_PREREQ_TEMPNAME
   fi
 ])
 
@@ -53,14 +60,3 @@ AC_DEFUN([gl_FUNC_MKSTEMP],
 AC_DEFUN([gl_PREREQ_MKSTEMP],
 [
 ])
-
-# Prerequisites of lib/tempname.c.
-AC_DEFUN([gl_PREREQ_TEMPNAME],
-[
-  AC_REQUIRE([AC_HEADER_STAT])
-  AC_CHECK_HEADERS_ONCE(fcntl.h sys/time.h unistd.h)
-  AC_CHECK_HEADERS(stdint.h)
-  AC_CHECK_FUNCS(__secure_getenv gettimeofday)
-  AC_CHECK_DECLS_ONCE(getenv)
-  AC_REQUIRE([gl_AC_TYPE_UINTMAX_T])
-])