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patches/gcc/4.3.1/180-superh-default-multilib.patch
author Michael Hope <michael.hope@linaro.org>
Wed Oct 19 15:27:32 2011 +1300 (2011-10-19)
changeset 2739 f320e22f2cba
parent 746 b150d6f590fc
permissions -rw-r--r--
arch: add softfp support

Some architectures support a mixed hard/soft floating point, where
the compiler emits hardware floating point instructions, but passes
the operands in core (aka integer) registers.

For example, ARM supports this mode (to come in the next changeset).

Add support for softfp cross compilers to the GCC and GLIBC
configuration. Needed for Ubuntu and other distros that are softfp.

Signed-off-by: Michael Hope <michael.hope@linaro.org>
[yann.morin.1998@anciens.enib.fr: split the original patch]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr> 
     1 Original patch from gentoo: gentoo/src/patchsets/gcc/4.3.1/gentoo/53_all_gcc4-superh-default-multilib.patch

     2 The gcc-3.x toolchains would contain all the targets by default.  With gcc-4,

     3 you have to actually list out the multilibs you want or you will end up with

     4 just one when using targets like 'sh4-linux-gnu'.

     5 

     6 The resulting toolchain can't even build a kernel as the kernel needs to build

     7 with the nofpu flag to be sure that no fpu ops are generated.

     8 

     9 Here we restore the gcc-3.x behavior; the additional overhead of building all

    10 of these multilibs by default is negligible.

    11 

    12 http://bugs.gentoo.org/140205

    13 

    14 diff -durN gcc-4.3.1.orig/gcc/config.gcc gcc-4.3.1/gcc/config.gcc

    15 --- gcc-4.3.1.orig/gcc/config.gcc	2008-05-21 10:54:15.000000000 +0200

    16 +++ gcc-4.3.1/gcc/config.gcc	2008-06-10 14:58:06.000000000 +0200

    17 @@ -2278,7 +2278,7 @@

    18  	if test x${sh_multilibs} = x ; then

    19  		case ${target} in

    20  		sh64-superh-linux* | \

    21 -		sh[1234]*)	sh_multilibs=${sh_cpu_target} ;;

    22 +		sh[1234]*)	sh_multilibs=`cd ${srcdir}/config/sh ; echo t-mlib-sh[1-4]* | sed 's:t-mlib-sh:,m:g;s: ::g'` ;;

    23  		sh64* | sh5*)	sh_multilibs=m5-32media,m5-32media-nofpu,m5-compact,m5-compact-nofpu,m5-64media,m5-64media-nofpu ;;

    24  		sh-superh-*)	sh_multilibs=m4,m4-single,m4-single-only,m4-nofpu ;;

    25  		sh*-*-linux*)	sh_multilibs=m1,m3e,m4 ;;
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