[5/10] RFC: don't check for stddef.h

[Tom Tromey <tromey@redhat.com>]

I think checking for stddef.h is likewise useless.
gdb includes it unconditionally already.

Also this pointed out that it is included twice in defs.h; also fixed in
this patch.

Tom

	* config.in: Rebuild.
	* configure: Rebuild.
	* configure.ac: Don't check for stddef.h.
	* defs.h: Update.  Remove redundant include.
---
 gdb/config.in    |    3 ---
 gdb/configure    |    2 +-
 gdb/configure.ac |    2 +-
 gdb/defs.h       |    6 ------
 4 files changed, 2 insertions(+), 11 deletions(-)

diff --git a/gdb/configure.ac b/gdb/configure.ac
index 58f715b..41bed53 100644
--- a/gdb/configure.ac
+++ b/gdb/configure.ac
@@ -1074,7 +1074,7 @@ fi
 AC_HEADER_STDC
 # elf_hp.h is for HP/UX 64-bit shared library support.
 AC_CHECK_HEADERS([nlist.h machine/reg.h poll.h sys/poll.h proc_service.h \
-                  thread_db.h stddef.h \
+                  thread_db.h \
 		  stdlib.h sys/fault.h \
 		  sys/file.h sys/filio.h sys/ioctl.h sys/param.h \
 		  sys/resource.h sys/procfs.h sys/ptrace.h ptrace.h \
diff --git a/gdb/defs.h b/gdb/defs.h
index 5e8a681..7bb85b0 100644
--- a/gdb/defs.h
+++ b/gdb/defs.h
@@ -49,9 +49,7 @@
    included, so it's ok to blank out gstdint.h.  */
 #define GCC_GENERATED_STDINT_H 1
 
-#ifdef HAVE_STDDEF_H
 #include <stddef.h>
-#endif
 
 #ifdef HAVE_UNISTD_H
 #include <unistd.h>
@@ -623,10 +621,6 @@ enum gdb_osabi
 
 /* From other system libraries */
 
-#ifdef HAVE_STDDEF_H
-#include <stddef.h>
-#endif
-
 #ifdef HAVE_STDLIB_H
 #include <stdlib.h>
 #endif
-- 
1.7.7.6