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authorKhem Raj <raj.khem@gmail.com>2011-12-16 14:33:37 -0800
committerRichard Purdie <richard.purdie@linuxfoundation.org>2011-12-19 09:27:29 +0000
commit28b772e42a20faebe1b4f415d28b42b7e0a424fb (patch)
treeaa840e93b635d66cfa6de6a99927217514e15af6 /meta/recipes-devtools/dpkg/run-postinsts
parent130b534fdb0b292158981a12d7d5f01c1a14cb2a (diff)
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gcc-4.6: Let G++ relocate gxx-include-dir when using --sysroot option
Currently we have a problem in our cross compiler since we use /usr/include/c++ to be default gxx-include-dir and then expect the patch we did to do the relocation w.r.t. sysroot however it does not quite work so and we end up gxx-include-dirs not respecting sysroot. A small test case would be tst-unique4.cc and it would fails like tst-unique4.cc:1:18: fatal error: cstdio: No such file or directory compilation terminated. weather we use --sysroot or not it does not matter arm-oe-linux-gnueabi-g++ -S tst-unique4.cc --sysroot=/home/kraj/work/angstrom/sources/openembedded-core/build/tmp-eglibc/sysroots/qemuarm failed in same way. so we redo the GPLUSPLUS_INCLUDE_DIR_with_sysroot.patch based on upstream submitted patch which tries to relocate the gxx-include-dir and to achieve the relocation it has to be specified w.r.t to --with-sysroot directory. e.g. --with-sysroot=${SYSROOT} --with-gxx-include-dir=${SYSROOT}/usr/include/c++ if we configure gcc like above then it becomes relocatable when we run the compiler and specify --sysroot=<blah> then g++ will search for gxx-headers under <blah>/usr/include/c++ if sysroot is not defined then it will use the default sysroot and gxx-include-dir will be w.r.t. default sysroot. Tested on qemuarm /arm-oe-linux-gnueabi-g++ -S tst-unique4.cc --sysroot=/home/kraj/work/angstrom/sources/openembedded-core/build/tmp-eglibc/sysroots/qemuarm -v ... /home/kraj/work/angstrom/sources/openembedded-core/build/tmp-eglibc/sysroots/qemuarm/usr/include/c++ /home/kraj/work/angstrom/sources/openembedded-core/build/tmp-eglibc/sysroots/qemuarm/usr/include/c++/arm-oe-linux-gnueabi /home/kraj/work/angstrom/sources/openembedded-core/build/tmp-eglibc/sysroots/qemuarm/usr/include/c++/backward ... and if I now change --sysroot to something else /arm-oe-linux-gnueabi-g++ -S tst-unique4.cc --sysroot=/home/kraj/work/angstrom/sources/openembedded-core/build/tmp-eglibc/sysroots/qemuarm4 -v ... ignoring nonexistent directory "/home/kraj/work/angstrom/sources/openembedded-core/build/tmp-eglibc/sysroots/qemuarm4/usr/include/c++" ignoring nonexistent directory "/home/kraj/work/angstrom/sources/openembedded-core/build/tmp-eglibc/sysroots/qemuarm4/usr/include/c++/arm-oe-linux-gnueabi" ignoring nonexistent directory "/home/kraj/work/angstrom/sources/openembedded-core/build/tmp-eglibc/sysroots/qemuarm4/usr/include/c++/backward" ... See now its looking for them in 'qemuarm4' sysroot Signed-off-by: Khem Raj <raj.khem@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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