* sysdeps/unix/sysv/linux/bits/local_lim.h: Undefined ARG_MAX if

	<linux/limits.h> has defined it.
	* sysdeps/unix/sysv/linux/sys/param.h: Define NCARGS to the legacy
	ARG_MAX value and prevent ARG_MAX from being defined by the kernel
	headers.
	* sysdeps/unix/sysv/linux/sysconf.c: Define legacy_ARG_MAX and use
	it instead of ARG_MAX.

5 files changed, 46 insertions, 5 deletions

diff --git a/nptl/sysdeps/unix/sysv/linux/alpha/bits/local_lim.h b/nptl/sysdeps/unix/sysv/linux/alpha/bits/local_lim.h
index 9b27b1f..a7c9740 100644
--- a/nptl/sysdeps/unix/sysv/linux/alpha/bits/local_lim.h
+++ b/nptl/sysdeps/unix/sysv/linux/alpha/bits/local_lim.h
@@ -1,5 +1,5 @@
 /* Minimum guaranteed maximum values for system limits.  Linux/Alpha version.
-   Copyright (C) 1993-1998,2000,2002,2003,2004 Free Software Foundation, Inc.
+   Copyright (C) 1993-1998,2000,2002-2004,2008 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
@@ -31,6 +31,9 @@
 #ifndef OPEN_MAX
 # define __undef_OPEN_MAX
 #endif
+#ifndef ARG_MAX
+# define __undef_ARG_MAX
+#endif
 
 /* The kernel sources contain a file with all the needed information.  */
 #include <linux/limits.h>
@@ -50,6 +53,11 @@
 # undef OPEN_MAX
 # undef __undef_OPEN_MAX
 #endif
+/* Have to remove ARG_MAX?  */
+#ifdef __undef_ARG_MAX
+# undef ARG_MAX
+# undef __undef_ARG_MAX
+#endif
 
 /* The number of data keys per process.  */
 #define _POSIX_THREAD_KEYS_MAX	128
diff --git a/nptl/sysdeps/unix/sysv/linux/bits/local_lim.h b/nptl/sysdeps/unix/sysv/linux/bits/local_lim.h
index 4b7b297..8f0df4f 100644
--- a/nptl/sysdeps/unix/sysv/linux/bits/local_lim.h
+++ b/nptl/sysdeps/unix/sysv/linux/bits/local_lim.h
@@ -1,5 +1,5 @@
 /* Minimum guaranteed maximum values for system limits.  Linux version.
-   Copyright (C) 1993-1998,2000,2002,2003,2004 Free Software Foundation, Inc.
+   Copyright (C) 1993-1998,2000,2002-2004,2008 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
@@ -31,6 +31,9 @@
 #ifndef OPEN_MAX
 # define __undef_OPEN_MAX
 #endif
+#ifndef ARG_MAX
+# define __undef_ARG_MAX
+#endif
 
 /* The kernel sources contain a file with all the needed information.  */
 #include <linux/limits.h>
@@ -50,6 +53,11 @@
 # undef OPEN_MAX
 # undef __undef_OPEN_MAX
 #endif
+/* Have to remove ARG_MAX?  */
+#ifdef __undef_ARG_MAX
+# undef ARG_MAX
+# undef __undef_ARG_MAX
+#endif
 
 /* The number of data keys per process.  */
 #define _POSIX_THREAD_KEYS_MAX	128
diff --git a/nptl/sysdeps/unix/sysv/linux/ia64/bits/local_lim.h b/nptl/sysdeps/unix/sysv/linux/ia64/bits/local_lim.h
index 83db31e..4b8a035 100644
--- a/nptl/sysdeps/unix/sysv/linux/ia64/bits/local_lim.h
+++ b/nptl/sysdeps/unix/sysv/linux/ia64/bits/local_lim.h
@@ -1,5 +1,5 @@
 /* Minimum guaranteed maximum values for system limits.  Linux/IA-64 version.
-   Copyright (C) 1993-1998,2000,2002,2003,2004 Free Software Foundation, Inc.
+   Copyright (C) 1993-1998,2000,2002-2004,2008 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
@@ -31,6 +31,9 @@
 #ifndef OPEN_MAX
 # define __undef_OPEN_MAX
 #endif
+#ifndef ARG_MAX
+# define __undef_ARG_MAX
+#endif
 
 /* The kernel sources contain a file with all the needed information.  */
 #include <linux/limits.h>
@@ -50,6 +53,11 @@
 # undef OPEN_MAX
 # undef __undef_OPEN_MAX
 #endif
+/* Have to remove ARG_MAX?  */
+#ifdef __undef_ARG_MAX
+# undef ARG_MAX
+# undef __undef_ARG_MAX
+#endif
 
 /* The number of data keys per process.  */
 #define _POSIX_THREAD_KEYS_MAX	128
diff --git a/nptl/sysdeps/unix/sysv/linux/powerpc/bits/local_lim.h b/nptl/sysdeps/unix/sysv/linux/powerpc/bits/local_lim.h
index 02e2d17..8b836a9 100644
--- a/nptl/sysdeps/unix/sysv/linux/powerpc/bits/local_lim.h
+++ b/nptl/sysdeps/unix/sysv/linux/powerpc/bits/local_lim.h
@@ -1,5 +1,6 @@
 /* Minimum guaranteed maximum values for system limits.  Linux/PPC version.
-   Copyright (C) 1993-1998,2000,2002-2004,2006 Free Software Foundation, Inc.
+   Copyright (C) 1993-1998,2000,2002-2004,2006,2008
+   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
@@ -31,6 +32,9 @@
 #ifndef OPEN_MAX
 # define __undef_OPEN_MAX
 #endif
+#ifndef ARG_MAX
+# define __undef_ARG_MAX
+#endif
 
 /* The kernel sources contain a file with all the needed information.  */
 #include <linux/limits.h>
@@ -50,6 +54,11 @@
 # undef OPEN_MAX
 # undef __undef_OPEN_MAX
 #endif
+/* Have to remove ARG_MAX?  */
+#ifdef __undef_ARG_MAX
+# undef ARG_MAX
+# undef __undef_ARG_MAX
+#endif
 
 /* The number of data keys per process.  */
 #define _POSIX_THREAD_KEYS_MAX	128
diff --git a/nptl/sysdeps/unix/sysv/linux/sparc/bits/local_lim.h b/nptl/sysdeps/unix/sysv/linux/sparc/bits/local_lim.h
index 2576f12..6e35603 100644
--- a/nptl/sysdeps/unix/sysv/linux/sparc/bits/local_lim.h
+++ b/nptl/sysdeps/unix/sysv/linux/sparc/bits/local_lim.h
@@ -1,5 +1,5 @@
 /* Minimum guaranteed maximum values for system limits.  Linux/SPARC version.
-   Copyright (C) 1993-1998,2000,2002,2003,2004 Free Software Foundation, Inc.
+   Copyright (C) 1993-1998,2000,2002-2004,2008 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
@@ -31,6 +31,9 @@
 #ifndef OPEN_MAX
 # define __undef_OPEN_MAX
 #endif
+#ifndef ARG_MAX
+# define __undef_ARG_MAX
+#endif
 
 /* The kernel sources contain a file with all the needed information.  */
 #include <linux/limits.h>
@@ -50,6 +53,11 @@
 # undef OPEN_MAX
 # undef __undef_OPEN_MAX
 #endif
+/* Have to remove ARG_MAX?  */
+#ifdef __undef_ARG_MAX
+# undef ARG_MAX
+# undef __undef_ARG_MAX
+#endif
 
 /* The number of data keys per process.  */
 #define _POSIX_THREAD_KEYS_MAX	128