__func__

[Simon Josefsson]

>From the gcc manual:

   `__FUNCTION__' is another name for `__func__'.  Older versions of GCC
   recognize only this name.  However, it is not standardized.  For
   maximum portability, we recommend you use `__func__', but provide a
   fallback definition with the preprocessor:

     #if __STDC_VERSION__ < 199901L
     # if __GNUC__ >= 2
     #  define __func__ __FUNCTION__
     # else
     #  define __func__ "<unknown>"
     # endif
     #endif

The __func__ module will add the block above to config.h, to make sure
that __func__ is usable.

If there are other pre-C99 compilers that use other ways of printing the
function name, I suppose the module could be extended with those.

What do you think?

I was unsure where to document this, it isn't either a function or
header file, strictly speaking.

/Simon

diff --git a/ChangeLog b/ChangeLog
index 040fffa..f58fa96 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2008-02-28  Simon Josefsson  <address@hidden>
+
+       * modules/__func__: New module.
+
+       * m4/__func__.m4: New file.
+
 2008-02-28  Sergey Poznyakoff  <address@hidden>
 
        * build-aux/bootstrap (source_base, m4_base)

# __func__.m4 serial 1
dnl Copyright (C) 2008 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.

# Written by Simon Josefsson

AC_DEFUN([gl___FUNC__],
[
  AC_MSG_NOTICE([making sure __func__ is available])
  AH_VERBATIM(__FUNC__, [
#if __STDC_VERSION__ < 199901L
# if __GNUC__ >= 2
#  define __func__ __FUNCTION__
# else
#  define __func__ "<unknown>"
# endif
#endif
  ])
])

Description:
Make sure __func__ is usable even on non-C99 platforms.

Files:
m4/__func__.m4

Depends-on:

configure.ac:
gl___FUNC__

Makefile.am:

Include:

License:
LGPL

Maintainer:
Simon Josefsson