Use an include file in configure.ac's AH_BOTTOM

* configure.ac (AH_BOTTOM): Use an include file, so that the
contents do not get processed by autoheader.  Eg this prevents undefs
being commented out, and is the recommended technique from the
autoconf manual.

* src/conf_post.h: New, split from configure.ac's AH_BOTTOM.

* src/Makefile.in (config_h): Add conf_post.h.
* src/makefile.w32-in (CONFIG_H): Add conf_post.h.

1 files changed, 131 insertions, 0 deletions

diff --git a/src/conf_post.h b/src/conf_post.h
new file mode 100644
index 00000000000..5efecfb8c05
--- /dev/null
+++ b/src/conf_post.h
@@ -0,0 +1,131 @@
+/* conf_post.h --- configure.ac includes this via AH_BOTTOM
+
+Copyright (C) 1988, 1993-1994, 1999-2002, 2004-2012
+  Free Software Foundation, Inc.
+
+This file is part of GNU Emacs.
+
+GNU Emacs is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+GNU Emacs is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
+
+/* Commentary:
+
+   Rather than writing this code directly in AH_BOTTOM, we include it
+   via this file.  This is so that it does not get processed by
+   autoheader.  Eg, any undefs here would otherwise be commented out.
+*/
+
+/* Code: */
+
+/* On AIX 3 this must be included before any other include file.  */
+#include <alloca.h>
+#if ! HAVE_ALLOCA
+# error "alloca not available on this machine"
+#endif
+
+#ifdef SIGNAL_H_AHB
+#undef SIGNAL_H_AHB
+#include <signal.h>
+#endif
+
+/* This silences a few compilation warnings on FreeBSD.  */
+#ifdef BSD_SYSTEM_AHB
+#undef BSD_SYSTEM_AHB
+#undef BSD_SYSTEM
+#if __FreeBSD__ == 1
+#define BSD_SYSTEM 199103
+#elif __FreeBSD__ == 2
+#define BSD_SYSTEM 199306
+#elif __FreeBSD__ >= 3
+#define BSD_SYSTEM 199506
+#endif
+#endif
+
+/* Define AMPERSAND_FULL_NAME if you use the convention
+   that & in the full name stands for the login id.  */
+/* Turned on June 1996 supposing nobody will mind it.  */
+#define AMPERSAND_FULL_NAME
+
+/* `subprocesses' should be defined if you want to
+   have code for asynchronous subprocesses
+   (as used in M-x compile and M-x shell).
+   Only MSDOS does not support this (it overrides
+   this in its config_opsysfile below).  */
+
+#define subprocesses
+
+/* Include the os dependent file.  */
+#ifdef config_opsysfile
+# include config_opsysfile
+#endif
+
+/* Mac OS X / GNUstep need a bit more pure memory.  Of the existing knobs,
+   SYSTEM_PURESIZE_EXTRA seems like the least likely to cause problems.  */
+#ifdef HAVE_NS
+#if defined NS_IMPL_GNUSTEP
+#  define SYSTEM_PURESIZE_EXTRA 30000
+#elif defined DARWIN_OS
+#  define SYSTEM_PURESIZE_EXTRA 200000
+#endif
+#endif
+
+#ifdef emacs /* Don't do this for lib-src.  */
+/* Tell regex.c to use a type compatible with Emacs.  */
+#define RE_TRANSLATE_TYPE Lisp_Object
+#define RE_TRANSLATE(TBL, C) CHAR_TABLE_TRANSLATE (TBL, C)
+#ifdef make_number
+/* If make_number is a macro, use it.  */
+#define RE_TRANSLATE_P(TBL) (!EQ (TBL, make_number (0)))
+#else
+/* If make_number is a function, avoid it.  */
+#define RE_TRANSLATE_P(TBL) (!(INTEGERP (TBL) && XINT (TBL) == 0))
+#endif
+#endif
+
+#include <string.h>
+#include <stdlib.h>
+
+#if __GNUC__ >= 3  /* On GCC 3.0 we might get a warning.  */
+#define NO_INLINE __attribute__((noinline))
+#else
+#define NO_INLINE
+#endif
+
+#if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1))
+#define EXTERNALLY_VISIBLE __attribute__((externally_visible))
+#else
+#define EXTERNALLY_VISIBLE
+#endif
+
+#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7)
+# define ATTRIBUTE_FORMAT(spec) __attribute__ ((__format__ spec))
+#else
+# define ATTRIBUTE_FORMAT(spec) /* empty */
+#endif
+
+#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4)
+# define ATTRIBUTE_FORMAT_PRINTF(formatstring_parameter, first_argument) \
+   ATTRIBUTE_FORMAT ((__gnu_printf__, formatstring_parameter, first_argument))
+#else
+# define ATTRIBUTE_FORMAT_PRINTF(formatstring_parameter, first_argument) \
+   ATTRIBUTE_FORMAT ((__printf__, formatstring_parameter, first_argument))
+#endif
+
+#define ATTRIBUTE_CONST _GL_ATTRIBUTE_CONST
+
+/* Some versions of GNU/Linux define noinline in their headers.  */
+#ifdef noinline
+#undef noinline
+#endif
+
+/* conf_post.h ends here */