[PATCH] Clean up `glibconfig.h'

[Raja R Harinath <harinath cs umn edu>]

I have uploaded 

	glib-rrh-19981025-0.patch.gz

to ftp.gtk.org:/incoming.

The idea of this patch is the same as my previous suggested patch 
(glib-rrh-980712-0.patch.gz):

  Installed header files should not define/test HAVE_* macros which are
  the output of a configure process -- this will prevent unnecessary
  interactions with other packages that define/use similar HAVE_* macros.

  They should use sanitized macros, and they can depend on header files
  that are installed under $exec_prefix to provide the sanitized values.

The basic problem it is trying to fix is that the installed
`glibconfig.h' has a lot of HAVE_* macros.

Another "problem" is that `glib.h' has a lot of nearly identical set
of #defines/typedefs chosen among by some `#ifdef' which use the above
HAVE_* macros.  One option is to rename every HAVE_* to G_HAVE_* and be
done with it.  Another is to try to precompute the results of the #ifdef
tests and emit only those defines that would have been used originally.
I chose the second option.

This patch is pretty transparent, and requires few modifications of
other packages.  I've been using this, and a variant of this, for nearly
4 months and haven't seen many problems.  The changes needed in other
packages:

	* gdk/gdki18n.h: Use G_HAVE_{WCHAR_H,WCTYPE_H,BROKEN_WCTYPE}
	instead of HAVE_*.

	* ORBit/src/ORBitutil/basic_types.h: Use G_HAVE_GINT64 instead 
	of HAVE_GINT64.

Here's the ChangeLog for `glib':

1998-10-25  Raja R Harinath  <harinath@cs.umn.edu>

	* Makefile.am (glibconfig.h): New rule.  
	(stamp-gc-h): New rule.  Generate `glibconfig.h'.
	* configure.in (AM_CONFIG_HEADER): It is now `config.h'.
	(HAVE_BROKEN_WCTYPE): On Solaris, look for iswalnum in -lw before
	concluding "broken wctype".
	(glibconfig.h): Use AC_OUTPUT_COMMANDS to put generation code into
	config.status.
	* glib.h: Remove a lot of tests and defines.  All these have been
	moved to `configure.in (glibconfig.h)'.
	* gmem.c: Include <config.h>.
	* gstrfuncs.c: Likewise.
	* gutils.c: Likewise.


- Hari
-- 
Raja R Harinath ------------------------------ harinath@cs.umn.edu
"When all else fails, read the instructions."      -- Cahn's Axiom
"Our policy is, when in doubt, do the right thing."   -- Roy L Ash