Let m4-1.4.2 build on systems lacking mkstemp(3)

[Noah Misch]

m4-1.4.2 (and probably m4-1.4.1, but not m4-1.4) does not build on a system
lacking mkstemp(3); src/output.c ships a static replacement, but the 2001-02-01
src/builtin.c change introduced a mkstemp(3) dependency there.  In the interest
of simplicitly, this patch merely makes the output.c replacement non-static and
independent of the need to replace tmpfile(3).

Patch is -p0 style.  All regressions pass on the affected platform.

2005-01-16  Noah Misch  <address@hidden>

        * src/output.c (mkstemp): Make non-static, and build regardless of
        HAVE_TMPFILE; src/builtin.c also needs this replacement.
        * NEWS: Update.

--- ./NEWS~     Sat Aug 21 08:06:03 2004
+++ ./NEWS      Sun Jan 16 19:46:08 2005
@@ -1,5 +1,9 @@
 GNU m4 NEWS - User visible changes.
-Copyright (C) 1992, 1993, 1994, 2004 Free Software Foundation, Inc.
+Copyright (C) 1992, 1993, 1994, 2004, 2005 Free Software Foundation, Inc.
+
+Version 1.4.3 - ?, by ?
+
+* Portability fix for systems lacking mkstemp(3).
 
 Version 1.4.2 - August 2004, by Paul Eggert
 
--- ./src/output.c~     Sat Aug 21 06:29:00 2004
+++ ./src/output.c      Sun Jan 16 19:44:54 2005
@@ -1,6 +1,6 @@
 /* GNU m4 -- A simple macro processor
 
-   Copyright (C) 1989, 1990, 1991, 1992, 1993, 1994, 2004 Free
+   Copyright (C) 1989, 1990, 1991, 1992, 1993, 1994, 2004, 2005 Free
    Software Foundation, Inc.
   
    This program is free software; you can redistribute it and/or modify
@@ -102,8 +102,6 @@
   output_unused = 0;
 }
 
-#ifndef HAVE_TMPFILE
-
 #ifndef HAVE_MKSTEMP
 
 /* This implementation of mkstemp(3) does not avoid any races, but its
@@ -111,7 +109,7 @@
 
 #include <fcntl.h>
 
-static int
+int
 mkstemp (const char *tmpl)
 {
   mktemp (tmpl);
@@ -119,6 +117,8 @@
 }
 
 #endif /* not HAVE_MKSTEMP */
+
+#ifndef HAVE_TMPFILE
 
 /* Implement tmpfile(3) for non-USG systems.  */