From 01972990f6045f7da03165940d532c270595ff67 Mon Sep 17 00:00:00 2001
From: Bruno Haible <bruno@clisp.org>
Date: Thu, 31 Dec 2009 22:54:32 +0100
Subject: [PATCH] Avoid namespace pollution on glibc systems.

---
 ChangeLog          |  8 ++++++++
 lib/spawn.in.h     |  9 +++++++--
 lib/sys_times.in.h |  7 +++++--
 lib/wchar.in.h     | 11 +++++++----
 4 files changed, 27 insertions(+), 8 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index a318caec77..b43a6e6d7c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2009-12-31  Bruno Haible  <bruno@clisp.org>
+
+	Avoid namespace pollution on glibc systems.
+	* lib/spawn.in.h: Don't include <sched.h>, <signal.h> on glibc systems.
+	* lib/sys_times.in.h: Don't include <time.h> on glibc systems.
+	* lib/wchar.in.h: Don't include <stddef.h>, <stdio.h>, <time.h> on
+	glibc systems.
+
 2009-12-31  Bruno Haible  <bruno@clisp.org>
 
 	* m4/wchar.m4 (gl_WCHAR_H): Remove gl_STDDEF_H invocation.
diff --git a/lib/spawn.in.h b/lib/spawn.in.h
index 3c42bfae5a..5a7633c2f9 100644
--- a/lib/spawn.in.h
+++ b/lib/spawn.in.h
@@ -29,8 +29,13 @@
 #ifndef _GL_SPAWN_H
 #define _GL_SPAWN_H
 
-#include <sched.h>
-#include <signal.h>
+/* Get definitions of 'struct sched_param' and 'sigset_t'.
+   But avoid namespace pollution on glibc systems.  */
+#ifndef __GLIBC__
+# include <sched.h>
+# include <signal.h>
+#endif
+
 #include <sys/types.h>
 
 #ifndef __THROW
diff --git a/lib/sys_times.in.h b/lib/sys_times.in.h
index 31ab4ce37c..34aa281ee1 100644
--- a/lib/sys_times.in.h
+++ b/lib/sys_times.in.h
@@ -32,8 +32,11 @@
 
 # define _GL_SYS_TIMES_H
 
-/* Get clock_t. */
-# include <time.h>
+/* Get clock_t.
+   But avoid namespace pollution on glibc systems.  */
+# ifndef __GLIBC__
+#  include <time.h>
+# endif
 
 /* The definition of GL_LINK_WARNING is copied here.  */
 
diff --git a/lib/wchar.in.h b/lib/wchar.in.h
index d7e798b4c2..d58c2642d6 100644
--- a/lib/wchar.in.h
+++ b/lib/wchar.in.h
@@ -55,10 +55,13 @@
 /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
    <wchar.h>.
    BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
-   included before <wchar.h>.  */
-#include <stddef.h>
-#include <stdio.h>
-#include <time.h>
+   included before <wchar.h>.
+   But avoid namespace pollution on glibc systems.  */
+#ifndef __GLIBC__
+# include <stddef.h>
+# include <stdio.h>
+# include <time.h>
+#endif
 
 /* Include the original <wchar.h> if it exists.
    Some builds of uClibc lack it.  */
-- 
2.30.2