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patches/binutils/2.20/300-mips64-defaultemul.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 --- binutils-2.20/ld/configure.tgt.orig	2010-02-20 04:05:31.000000000 -0500

     2 +++ binutils-2.20/ld/configure.tgt	2010-02-20 04:08:11.000000000 -0500

     3 @@ -400,11 +400,11 @@

     4  mips*-*-vxworks*)	targ_emul=elf32ebmipvxworks

     5  		        targ_extra_emuls="elf32elmipvxworks" ;;

     6  mips*-*-windiss)	targ_emul=elf32mipswindiss ;;

     7 -mips64*el-*-linux-*)	targ_emul=elf32ltsmipn32

     8 -			targ_extra_emuls="elf32btsmipn32 elf32ltsmip elf32btsmip elf64ltsmip elf64btsmip"

     9 +mips64*el-*-linux-*)	targ_emul=elf64ltsmip

    10 +			targ_extra_emuls="elf32ltsmipn32 elf32btsmipn32 elf32ltsmip elf32btsmip elf64btsmip"

    11  			targ_extra_libpath=$targ_extra_emuls ;;

    12 -mips64*-*-linux-*)	targ_emul=elf32btsmipn32

    13 -			targ_extra_emuls="elf32ltsmipn32 elf32btsmip elf32ltsmip elf64btsmip elf64ltsmip"

    14 +mips64*-*-linux-*)	targ_emul=elf64btsmip

    15 +			targ_extra_emuls="elf32btsmipn32 elf32ltsmipn32 elf32btsmip elf32ltsmip elf64ltsmip"

    16  			targ_extra_libpath=$targ_extra_emuls ;;

    17  mips*el-*-linux-*)	targ_emul=elf32ltsmip

    18  			targ_extra_emuls="elf32btsmip elf32ltsmipn32 elf64ltsmip elf32btsmipn32 elf64btsmip"
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