don't check for stddef.h

gdb already unconditionally includes stddef.h in many places.
I think there is no reason to check for its existence.

Also, Zack Weinberg's header file survey agrees:

    http://hacks.owlfolio.org/header-survey/

This patch removes the configure check and the inclusion guards.
It also removes a redundant inclusion that I noticed in defs.h.

2013-11-18  Tom Tromey  <tromey@redhat.com>

	* config.in: Rebuild.
	* configure: Rebuild.
	* configure.ac: Don't check for stddef.h.
	* defs.h: Unconditionally include stddef.h.  Remove duplicate
	inclusion.

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index fc6336c..3a6f452 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,13 @@
 2013-11-18  Tom Tromey  <tromey@redhat.com>
 
+       * config.in: Rebuild.
+       * configure: Rebuild.
+       * configure.ac: Don't check for stddef.h.
+       * defs.h: Unconditionally include stddef.h.  Remove duplicate
+       inclusion.
+
+2013-11-18  Tom Tromey  <tromey@redhat.com>
+
        * common/common.m4 (GDB_AC_COMMON): Don't use AC_HEADER_DIRENT.
        * common/gdb_dirent.h: Remove.
        * common/filestuff.c: Use dirent.h.

diff --git a/gdb/config.in b/gdb/config.in
index 4e3f6de..802127f 100644 (file)
--- a/gdb/config.in
+++ b/gdb/config.in
@@ -378,9 +378,6 @@
 /* Define to 1 if the system has the type `socklen_t'. */
 #undef HAVE_SOCKLEN_T
 
-/* Define to 1 if you have the <stddef.h> header file. */
-#undef HAVE_STDDEF_H
-
 /* Define to 1 if you have the <stdint.h> header file. */
 #undef HAVE_STDINT_H
 

diff --git a/gdb/configure b/gdb/configure
index b1a4d48..1d1a486 100755 (executable)
--- a/gdb/configure
+++ b/gdb/configure
@@ -8756,7 +8756,7 @@ fi
 
 # elf_hp.h is for HP/UX 64-bit shared library support.
 for ac_header in 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/configure.ac b/gdb/configure.ac
index 6025e89..d6b75d6 100644 (file)
--- a/gdb/configure.ac
+++ b/gdb/configure.ac
@@ -1075,7 +1075,7 @@ 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 b1caaad..bb93742 100644 (file)
--- a/gdb/defs.h
+++ b/gdb/defs.h
@@ -48,9 +48,7 @@
    included, so it's ok to blank out gstdint.h.  */
 #define GCC_GENERATED_STDINT_H 1
 
-#ifdef HAVE_STDDEF_H
 #include <stddef.h>
-#endif
 
 #include <unistd.h>
 
@@ -606,10 +604,6 @@ enum gdb_osabi
 
 /* From other system libraries */
 
-#ifdef HAVE_STDDEF_H
-#include <stddef.h>
-#endif
-
 #ifdef HAVE_STDLIB_H
 #include <stdlib.h>
 #endif