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authorGravatar Yann E. MORIN <yann.morin.1998@anciens.enib.fr>2010-04-07 00:50:10 +0200
committerGravatar Peter Korsgaard <jacmet@sunsite.dk>2010-04-07 09:49:20 +0200
commit6db57c69360087b3b7b8fc2b7764d2911ec24d43 (patch)
treecfc88eee4f085d3dc7a82b5807ce92707cbfea71 /toolchain
parent3e7de2af675e24e8a33495ccbd1515854d490122 (diff)
downloadbuildroot-6db57c69360087b3b7b8fc2b7764d2911ec24d43.tar.gz
buildroot-6db57c69360087b3b7b8fc2b7764d2911ec24d43.tar.bz2
toolchain: fix using external toolchains built with buildroot
The toolchains built with buildroot use specially crafted paths for their sysroot and prefix. Fix that by asking gcc where it finds a file we know by relative path to the sysroot. This has the side effect of greatly simplifying the sysroot detection in every cases tested so far (BR toolchains, CT-NG toolchains, and CodeSourcery toolchains). Fixes bug #851. Thanks Thomas Petazzoni for the hint and some testings. Thanks Grant Edwards for the report and the comments. Signed-off-by: Yann E. MORIN <yann.morin.1998@anciens.enib.fr> Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Diffstat (limited to 'toolchain')
-rw-r--r--toolchain/external-toolchain/ext-tool.mk9
1 files changed, 1 insertions, 8 deletions
diff --git a/toolchain/external-toolchain/ext-tool.mk b/toolchain/external-toolchain/ext-tool.mk
index 80bdae63b5..4493281319 100644
--- a/toolchain/external-toolchain/ext-tool.mk
+++ b/toolchain/external-toolchain/ext-tool.mk
@@ -205,14 +205,7 @@ ifeq ($(BR2_INSTALL_LIBSTDCPP),y)
EXTERNAL_LIBS+=libstdc++.so
endif
-# This dance is needed because the toolchain may have been relocated, so the
-# configured paths may no longer match; fortunately, the sysroot moves along
-# the toolchain, so is always at the same place relative to the toolchain's
-# current location.
-CFG_PREFIX_DIR=$(shell LANG=C $(TARGET_CC) -v 2>&1 | grep ^Configured | tr " " "\n" | grep -- "--prefix=" | cut -f2 -d=)
-CFG_SYSROOT_DIR=$(shell LANG=C $(TARGET_CC) -v 2>&1 | grep ^Configured | tr " " "\n" | grep -- "--with-sysroot=" | cut -f2 -d=)
-REL_SYSROOT_DIR=$(shell echo "$(CFG_SYSROOT_DIR)" |sed -r -e 's:^$(CFG_PREFIX_DIR)::;')
-SYSROOT_DIR=$(TOOLCHAIN_EXTERNAL_PATH)/$(REL_SYSROOT_DIR)
+SYSROOT_DIR=$(shell readlink -f $$(LANG=C $(TARGET_CC) -print-file-name=libc.a |sed -r -e 's:usr/lib/libc\.a::;'))
$(STAMP_DIR)/ext-toolchain-installed:
@echo "Checking external toolchain settings"