obstack: Fix portability issues

i686-apple-darwin10-gcc-4.2.1 (GCC) 4.2.1, SunOS 5.10, and possibly
others do not have exit.h and exitfail.h. Remove the use of these in
obstack.c.

The __block variable was renamed to block to avoid a gcc error:

compat/obstack.h:190: error: __block attribute can be specified on variables only

Initial-patch-by: David Aguilar <davvid@gmail.com>
Reported-by: Brian Gernhardt <brian@gernhardtsoftware.com>
Signed-off-by: Fredrik Kuivinen <frekui@gmail.com>
Acked-by: David Aguilar <davvid@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

compat/obstack.c

@@ -18,17 +18,9 @@
    Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
    Boston, MA 02110-1301, USA.  */
 
-
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
-
-#ifdef _LIBC
-# include <obstack.h>
-# include <shlib-compat.h>
-#else
-# include "obstack.h"
-#endif
+#include "git-compat-util.h"
+#include <gettext.h>
+#include "obstack.h"
 
 /* NOTE BEFORE MODIFYING THIS FILE: This version number must be
    incremented whenever callers compiled using an old obstack.h can no
@@ -103,15 +95,6 @@ enum
 static void print_and_abort (void);
 void (*obstack_alloc_failed_handler) (void) = print_and_abort;
 
-/* Exit value used when `print_and_abort' is used.  */
-# include <stdlib.h>
-# ifdef _LIBC
-int obstack_exit_failure = EXIT_FAILURE;
-# else
-#  include "exitfail.h"
-#  define obstack_exit_failure exit_failure
-# endif
-
 # ifdef _LIBC
 #  if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_3_4)
 /* A looong time ago (before 1994, anyway; we're not sure) this global variable
@@ -400,16 +383,6 @@ _obstack_memory_used (struct obstack *h)
   return nbytes;
 }
 
-/* Define the error handler.  */
-# ifdef _LIBC
-#  include <libintl.h>
-# else
-#  include "gettext.h"
-# endif
-# ifndef _
-#  define _(msgid) gettext (msgid)
-# endif
-
 # ifdef _LIBC
 #  include <libio/iolibio.h>
 # endif
@@ -435,7 +408,7 @@ print_and_abort (void)
 # else
   fprintf (stderr, "%s\n", _("memory exhausted"));
 # endif
-  exit (obstack_exit_failure);
+  exit (1);
 }
 
 #endif	/* !ELIDE_CODE */

compat/obstack.h

@@ -187,7 +187,7 @@ extern int _obstack_begin_1 (struct obstack *, int, int,
 			     void (*) (void *, void *), void *);
 extern int _obstack_memory_used (struct obstack *);
 
-void obstack_free (struct obstack *__obstack, void *__block);
+void obstack_free (struct obstack *, void *);
 
 
 /* Error handler called when `obstack_chunk_alloc' failed to allocate
@@ -195,9 +195,6 @@ void obstack_free (struct obstack *__obstack, void *__block);
    should either abort gracefully or use longjump - but shouldn't
    return.  The default action is to print a message and abort.  */
 extern void (*obstack_alloc_failed_handler) (void);
-
-/* Exit value used when `print_and_abort' is used.  */
-extern int obstack_exit_failure;
 
 /* Pointer to beginning of object being allocated or to be allocated next.
    Note that this might not be the final address of the object

kwset.c

@@ -37,7 +37,7 @@
 #include "cache.h"
 
 #include "kwset.h"
-#include "obstack.h"
+#include "compat/obstack.h"
 
 #define NCHAR (UCHAR_MAX + 1)
 #define obstack_chunk_alloc xmalloc