patches/gcc/4.3.1/180-superh-default-multilib.patch
author "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Sat Dec 31 18:47:37 2011 +0100 (2011-12-31)
changeset 2829 0c3c95f911ec
parent 746 b150d6f590fc
permissions -rw-r--r--
docs: credit Konrad EISELE for the initial multilib support

Konrad submitted an initial patch adding multlib support:
http://sourceware.org/ml/crossgcc/2011-11/msg00040.html

The patch was full of good ideas, but had a few issues, so
I (Yann E. MORIN) started it all from scatch, re-using part
of the original patch. This got implemented in this series:
hg log -r 446a17b5dd1e:e47d17391ae3

As I forgot to credit Konrad in these changelogs, update the
docs so that the work by Konrad gets credited. Without his
initial effort, we would probably not have had multlib support
so soon. Thank you Konrad!

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
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Original patch from gentoo: gentoo/src/patchsets/gcc/4.3.1/gentoo/53_all_gcc4-superh-default-multilib.patch
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The gcc-3.x toolchains would contain all the targets by default.  With gcc-4,
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you have to actually list out the multilibs you want or you will end up with
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just one when using targets like 'sh4-linux-gnu'.
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The resulting toolchain can't even build a kernel as the kernel needs to build
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with the nofpu flag to be sure that no fpu ops are generated.
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Here we restore the gcc-3.x behavior; the additional overhead of building all
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of these multilibs by default is negligible.
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http://bugs.gentoo.org/140205
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diff -durN gcc-4.3.1.orig/gcc/config.gcc gcc-4.3.1/gcc/config.gcc
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--- gcc-4.3.1.orig/gcc/config.gcc	2008-05-21 10:54:15.000000000 +0200
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+++ gcc-4.3.1/gcc/config.gcc	2008-06-10 14:58:06.000000000 +0200
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@@ -2278,7 +2278,7 @@
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 	if test x${sh_multilibs} = x ; then
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 		case ${target} in
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 		sh64-superh-linux* | \
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-		sh[1234]*)	sh_multilibs=${sh_cpu_target} ;;
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+		sh[1234]*)	sh_multilibs=`cd ${srcdir}/config/sh ; echo t-mlib-sh[1-4]* | sed 's:t-mlib-sh:,m:g;s: ::g'` ;;
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 		sh64* | sh5*)	sh_multilibs=m5-32media,m5-32media-nofpu,m5-compact,m5-compact-nofpu,m5-64media,m5-64media-nofpu ;;
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 		sh-superh-*)	sh_multilibs=m4,m4-single,m4-single-only,m4-nofpu ;;
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 		sh*-*-linux*)	sh_multilibs=m1,m3e,m4 ;;