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patches/glibc/2.3.6/150-sh-lowlevellock.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 402 197e1b49586e
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 ML:	http://sources.redhat.com/ml/libc-hacker/2005-09/msg00002.html

     2 

     3 Date: Mon, 05 Sep 2005 21:07:15 +0900 (JST)

     4 Message-Id: <20050905.210715.15267870.kkojima@rr.iij4u.or.jp>

     5 To: libc-hacker at sources dot redhat dot com

     6 Subject: SH: A typo in lowlevellock.S

     7 From: Kaz Kojima <kkojima at rr dot iij4u dot or dot jp>

     8 

     9 Hi,

    10 

    11 The appended patch fixes a typo in a low-level lock function.  It

    12 set the correct 3rd argument for the futex syscall in loop.  Sorry

    13 for missing such an embarrassing bug.

    14 

    15 Regards,

    16 	kaz

    17 

    18 nptl/ChangeLog:

    19 2005-09-05  Kaz Kojima  <kkojima@rr.iij4u.or.jp>

    20 

    21 	* sysdeps/unix/sysv/linux/sh/lowlevellock.S (__lll_mutex_lock_wait):

    22 	Fix typo in register name.

    23 

    24 --- glibc.old/nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.S	2004-10-26 04:06:44.000000000 +0900

    25 +++ glibc/nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.S	2005-09-05 19:18:25.000000000 +0900

    26 @@ -1,4 +1,4 @@

    27 -/* Copyright (C) 2003, 2004 Free Software Foundation, Inc.

    28 +/* Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc.

    29     This file is part of the GNU C Library.

    30  

    31     The GNU C Library is free software; you can redistribute it and/or

    32 @@ -51,8 +51,8 @@ __lll_mutex_lock_wait:

    33  	SYSCALL_INST_PAD

    34  

    35  2:

    36 -	mov	#2, r4

    37 -	XCHG (r4, @r8, r2)

    38 +	mov	#2, r6

    39 +	XCHG (r6, @r8, r2)

    40  	tst	r2, r2

    41  	bf	1b

    42  

    43 Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>
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