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patches/glibc/ports-2.9/110-arm-fix-sjlj-for-fpu.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
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 From: Mike Frysinger <vapier at gentoo dot org>

     2 To: libc-ports at sourceware dot org

     3 Subject: [PATCH] arm/fpu/setjmp.S: add missing hidden def

     4 Date: Thu, 25 Dec 2008 23:08:56 -0500

     5 

     6 All the other arm setjmp.S files provide a hidden alias for __sigsetjmp.

     7 Without this, we get a nice build failure like so:

     8 

     9 /var/tmp/cross/armv4l-unknown-linux-gnu/portage/cross-armv4l-unknown-linux-gnu/glibc-2.9_p20081201/work/build-default-armv4l-unknown-linux-gnu-nptl/libc_pic.os: In function `setjmp':

    10 unwind-pe.c:(.text+0x15a54): undefined reference to `__GI___sigsetjmp'

    11 /var/tmp/cross/armv4l-unknown-linux-gnu/portage/cross-armv4l-unknown-linux-gnu/glibc-2.9_p20081201/work/build-default-armv4l-unknown-linux-gnu-nptl/libc_pic.os: In function `__GI__setjmp':

    12 unwind-pe.c:(.text+0x15a64): undefined reference to `__GI___sigsetjmp'

    13 collect2: ld returned 1 exit status

    14 make[1]: *** [/var/tmp/cross/armv4l-unknown-linux-gnu/portage/cross-armv4l-unknown-linux-gnu/glibc-2.9_p20081201/work/build-default-armv4l-unknown-linux-gnu-nptl/libc.so] Error 1

    15 

    16 Signed-off-by: Mike Frysinger <vapier@gentoo.org>

    17 ---

    18  sysdeps/arm/fpu/setjmp.S |    2 ++

    19  1 files changed, 2 insertions(+), 0 deletions(-)

    20 

    21 diff --git a/sysdeps/arm/fpu/setjmp.S b/sysdeps/arm/fpu/setjmp.S

    22 index 8432836..82a7e19 100644

    23 --- a/ports/sysdeps/arm/fpu/setjmp.S

    24 +++ b/ports/sysdeps/arm/fpu/setjmp.S

    25 @@ -33,3 +33,5 @@ ENTRY (__sigsetjmp)

    26  	/* Make a tail call to __sigjmp_save; it takes the same args.  */

    27  	B	PLTJMP(C_SYMBOL_NAME(__sigjmp_save))

    28  END (__sigsetjmp)

    29 +

    30 +hidden_def (__sigsetjmp)
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