[PATCH 1/5] extern-inline: new module

[Paul Eggert]

* modules/extern-inline, m4/extern-inline.m4: New files.
This is for better support of 'extern inline' a la ISO C99,
with a portable alternative on compilers that do not support
C99-style 'extern inline'.  Using 'extern inline' shrinks the size
of the Emacs executable, when compiled with debugging disabled,
which is a typical way that Emacs is built while developing.
---
 ChangeLog             |   10 ++++++++++
 m4/extern-inline.m4   |   40 ++++++++++++++++++++++++++++++++++++++++
 modules/extern-inline |   20 ++++++++++++++++++++
 3 files changed, 70 insertions(+), 0 deletions(-)
 create mode 100644 m4/extern-inline.m4
 create mode 100644 modules/extern-inline

diff --git a/ChangeLog b/ChangeLog
index 378c405..b1362fe 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,13 @@
+2012-07-28  Paul Eggert  <address@hidden>
+
+       extern-inline: new module
+       * modules/extern-inline, m4/extern-inline.m4: New files.
+       This is for better support of 'extern inline' a la ISO C99,
+       with a portable alternative on compilers that do not support
+       C99-style 'extern inline'.  Using 'extern inline' shrinks the size
+       of the Emacs executable, when compiled with debugging disabled,
+       which is a typical way that Emacs is built while developing.
+
 2012-07-27  Jim Meyering  <address@hidden>
 
        maint.mk: new rule: refresh-gnulib-patches
diff --git a/m4/extern-inline.m4 b/m4/extern-inline.m4
new file mode 100644
index 0000000..c80d546
--- /dev/null
+++ b/m4/extern-inline.m4
@@ -0,0 +1,40 @@
+dnl 'extern inline' a la ISO C99.
+
+dnl Copyright 2012 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.
+
+AC_DEFUN([gl_EXTERN_INLINE],
+[
+  AC_REQUIRE([AC_C_INLINE])
+  AH_VERBATIM([extern_inline],
+[/* _GL_INLINE is a portable alternative to ISO C99 plain 'inline'.
+    _GL_EXTERN_INLINE is a portable alternative to 'extern linline'.
+    _GL_INLINE_HEADER_BEGIN contains useful stuff to put
+      in an include file, before uses of _GL_INLINE.
+      It suppresses GCC's bogus "no previous prototype for 'FOO'" diagnostic,
+      when FOO is an inline function in the header; see
+      <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54113>.
+    _GL_INLINE_HEADER_END contains useful stuff to put
+      in the same include file, after uses of _GL_INLINE.  */
+#if __GNUC__ ? __GNUC_STDC_INLINE__ : 199901L <= __STDC_VERSION__
+# define _GL_INLINE inline
+# define _GL_EXTERN_INLINE extern inline
+# if (__GNUC__ == 4 && 6 <= __GNUC_MINOR__) || 4 < __GNUC__
+#  define _GL_INLINE_HEADER_BEGIN \
+     _Pragma ("GCC diagnostic push") \
+     _Pragma ("GCC diagnostic ignored \"-Wmissing-prototypes\"")
+#  define _GL_INLINE_HEADER_END \
+     _Pragma ("GCC diagnostic pop")
+# endif
+#else
+# define _GL_INLINE static inline
+# define _GL_EXTERN_INLINE static inline
+#endif
+
+#ifndef _GL_INLINE_HEADER_BEGIN
+# define _GL_INLINE_HEADER_BEGIN
+# define _GL_INLINE_HEADER_END
+#endif])
+])
diff --git a/modules/extern-inline b/modules/extern-inline
new file mode 100644
index 0000000..8863480
--- /dev/null
+++ b/modules/extern-inline
@@ -0,0 +1,20 @@
+Description:
+'extern inline' a la ISO C99.
+
+Files:
+m4/extern-inline.m4
+
+Depends-on:
+
+configure.ac:
+AC_REQUIRE([gl_EXTERN_INLINE])
+
+Makefile.am:
+
+Include:
+
+License:
+unlimited
+
+Maintainer:
+all
-- 
1.7.6.5