[OE-core] [PATCH RFC] binutils: allow distro to select gold as default cross-linker

[Phil Blundell]

On Wed, 2011-06-15 at 09:04 +0100, Phil Blundell wrote:
> One slightly annoying thing is that (e)glibc isn't buildable with gold
> because the linker scripts don't work.  So a little bit of patching is
> going to be needed to have it use ld.bfd there.  There might be some
> other packages with similar issues but I haven't come across any yet.

I think something like this is probably what's required for that.

>From 48eaba1da89086b8edccaa03c27075d78635ab01 Mon Sep 17 00:00:00 2001
From: Phil Blundell <philb at gnu.org>
Date: Wed, 15 Jun 2011 15:22:47 +0100
Subject: [PATCH] gcc-cross-intermediate: use ld.bfd if distro prefers gold


Signed-off-by: Phil Blundell <philb at gnu.org>
---
 .../gcc/gcc-cross-intermediate.inc                 |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)

diff --git a/meta/recipes-devtools/gcc/gcc-cross-intermediate.inc b/meta/recipes-devtools/gcc/gcc-cross-intermediate.inc
index 92c3ce2..05b5dbc 100644
--- a/meta/recipes-devtools/gcc/gcc-cross-intermediate.inc
+++ b/meta/recipes-devtools/gcc/gcc-cross-intermediate.inc
@@ -7,6 +7,10 @@ CROSS_TARGET_SYS_DIR_append = ".${PN}"
 
 # This is intended to be a -very- basic config
 # sysroot is needed in case we use libc-initial
+#
+# Glibc won't compile with gold, and building glibc is the whole point of
+# this recipe.   So we select ld.bfd explicitly here if gold is the distro's 
+# preferred linker.
 EXTRA_OECONF = "--with-local-prefix=${STAGING_DIR_TARGET}${target_prefix} \
 		--enable-shared \
 		--disable-multilib \
@@ -17,7 +21,8 @@ EXTRA_OECONF = "--with-local-prefix=${STAGING_DIR_TARGET}${target_prefix} \
 		--with-sysroot=${STAGING_DIR_TCBOOTSTRAP} \
 		--with-build-sysroot=${STAGING_DIR_TCBOOTSTRAP} \
 		${EXTRA_OECONF_INTERMEDIATE} \
-		${@get_gcc_fpu_setting(bb, d)}"
+		${@get_gcc_fpu_setting(bb, d)} \
+		${@base_contains('DISTRO_FEATURES', 'ld-is-gold', '--with-ld=${STAGING_BINDIR_TOOLCHAIN}/${TARGET_PREFIX}ld.bfd', '', d)}"
 
 do_populate_sysroot[sstate-inputdirs] = "${SYSROOT_DESTDIR}/${STAGING_DIR_HOST} ${SYSROOT_DESTDIR}/${STAGING_DIR_TARGET}/${target_base_libdir}"
 do_populate_sysroot[sstate-outputdirs] = "${STAGING_DIR_HOST} ${STAGING_DIR_TCBOOTSTRAP}/${target_base_libdir}"
-- 
1.7.2.5