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patches/glibc/2.9/450-alpha-glibc-2.5-no-page-header.patch
author "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Sun Sep 12 23:51:25 2010 +0200 (2010-09-12)
changeset 2123 ff2181adbd28
parent 1201 c9967a6e3b25
permissions -rw-r--r--
cc/gcc: disable complibs if not selected

Force gcc to not link with some companion libraries when
there are not needed (because selected-out).

There is no option to tell gcc *not* to build the Graphite and/or
LTO stuff. They *will* be built if gcc finds the suitable companion
libraries. If we do not provide them, but the host has them, then
gcc *will* find them, and link with them.

Consider the following:
- host has suitable PPL and CLooG (eg. Debian Squeeze)
- user wants to build gcc>=4.4
- user de-selects GRAPHITE
- gcc will find the hosts PPL and CLooG, and will use them
- the user moves the toolchain to an older host that does
not have them (eg. Debian Lenny)
- the toolchain fails, when it was properly setup not to

So, explicitly tell gcc *not* to use unneeded companion libs.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr> 
     1 Original patch from: gentoo/src/patchsets/glibc/2.9/6015_all_alpha-glibc-2.5-no-page-header.patch

     2 

     3 -= BEGIN original header =-

     4 2008-06-07  Mike Frysinger  <vapier@gentoo.org>

     5 

     6 	* sysdeps/unix/sysv/linux/alpha/sys/user.h: Copy page.h definitions

     7 	from the kernel header to sys/user.h and remove the #include of

     8 	sys/user.h.

     9 

    10 -= END original header =-

    11 

    12 diff -durN glibc-2_9.orig/sysdeps/unix/sysv/linux/alpha/sys/user.h glibc-2_9/sysdeps/unix/sysv/linux/alpha/sys/user.h

    13 --- glibc-2_9.orig/sysdeps/unix/sysv/linux/alpha/sys/user.h	2001-07-06 06:56:13.000000000 +0200

    14 +++ glibc-2_9/sysdeps/unix/sysv/linux/alpha/sys/user.h	2009-02-02 22:01:32.000000000 +0100

    15 @@ -23,7 +23,6 @@

    16     only. Don't read too much into it. Don't use it for anything other

    17     than gdb/strace unless you know what you are doing. */

    18  

    19 -#include <asm/page.h>

    20  #include <asm/reg.h>

    21  

    22  struct user

    23 @@ -41,6 +40,9 @@

    24    char u_comm[32];				/* user command name */

    25  };

    26  

    27 +#define PAGE_SHIFT		13

    28 +#define PAGE_SIZE		(1 << PAGE_SHIFT)

    29 +#define PAGE_MASK		(~(PAGE_SIZE-1))

    30  #define NBPG			PAGE_SIZE

    31  #define UPAGES			1

    32  #define HOST_TEXT_START_ADDR	(u.start_code)
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