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[PATCH] Fix <sys/sysctl.h> ([BZ #140])

From: Jakub Jelinek <jakub at redhat dot com>
To: Ulrich Drepper <drepper at redhat dot com>
Cc: Glibc hackers <libc-hacker at sources dot redhat dot com>
Date: Thu, 29 Apr 2004 19:28:05 +0200
Subject: [PATCH] Fix <sys/sysctl.h> ([BZ #140])
Reply-to: Jakub Jelinek <jakub at redhat dot com>

Hi!

Without the following patch
#include <sys/sysctl.h>
#include <sys/sysinfo.h>

int
main (void)
{
  struct sysinfo si;
  sysinfo (&si);
  return 0;
}

will not compile.

2004-04-29  Jakub Jelinek  <jakub@redhat.com>

	[BZ #140]
	* sysdeps/unix/sysv/linux/sys/sysctl.h: Remove linux/compiler.h
	include.
	(_LINUX_KERNEL_H, _LINUX_TYPES_H, _LINUX_LIST_H): Only define if not
	yet defined, #undef back after including linux/sysctl.h if defined
	here.
	(__LINUX_COMPILER_H, __user): Define if not yet defined, #undef
	back after including linux/sysctl.h if defined here.

--- libc/sysdeps/unix/sysv/linux/sys/sysctl.h.jj	2003-07-30 12:00:52.000000000 +0200
+++ libc/sysdeps/unix/sysv/linux/sys/sysctl.h	2004-04-29 21:26:10.088848633 +0200
@@ -1,4 +1,4 @@
-/* Copyright (C) 1996, 1999, 2002, 2003 Free Software Foundation, Inc.
+/* Copyright (C) 1996, 1999, 2002, 2003, 2004 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -23,14 +23,44 @@
 #define __need_size_t
 #include <stddef.h>
 /* Prevent more kernel headers than necessary to be included.  */
-#define _LINUX_KERNEL_H	1
-#define _LINUX_TYPES_H	1
-#define _LINUX_LIST_H	1
-/* We do need this one for the declarations in <linux/sysctl.h>,
-   since we've elided the inclusion of <linux/kernel.h> that gets them.  */
-#include <linux/compiler.h>
+#ifndef _LINUX_KERNEL_H
+# define _LINUX_KERNEL_H	1
+# define __undef_LINUX_KERNEL_H
+#endif
+#ifndef _LINUX_TYPES_H
+# define _LINUX_TYPES_H		1
+# define __undef_LINUX_TYPES_H
+#endif
+#ifndef _LINUX_LIST_H
+# define _LINUX_LIST_H		1
+# define __undef_LINUX_LIST_H
+#endif
+#ifndef __LINUX_COMPILER_H
+# define __LINUX_COMPILER_H	1
+# define __user
+# define __undef__LINUX_COMPILER_H
+#endif
+
 #include <linux/sysctl.h>
 
+#ifdef __undef_LINUX_KERNEL_H
+# undef _LINUX_KERNEL_H
+# undef __undef_LINUX_KERNEL_H
+#endif
+#ifdef __undef_LINUX_TYPES_H
+# undef _LINUX_TYPES_H
+# undef __undef_LINUX_TYPES_H
+#endif
+#ifdef __undef_LINUX_LIST_H
+# undef _LINUX_LIST_H
+# undef __undef_LINUX_LIST_H
+#endif
+#ifdef __undef__LINUX_COMPILER_H
+# undef __LINUX_COMPILER_H
+# undef __user
+# undef __undef__LINUX_COMPILER_H
+#endif
+
 __BEGIN_DECLS
 
 /* Read or write system parameters.  */

	Jakub

Follow-Ups:
- Re: [PATCH] Fix <sys/sysctl.h> ([BZ #140])
  - From: Roland McGrath

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