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>

1 files changed, 1 insertions, 1 deletions

diff --git a/meta/recipes-devtools/gcc/gcc-configure-sdk.inc b/meta/recipes-devtools/gcc/gcc-configure-sdk.inc
index f130b4757b..eb6757cdc8 100644
--- a/meta/recipes-devtools/gcc/gcc-configure-sdk.inc
+++ b/meta/recipes-devtools/gcc/gcc-configure-sdk.inc
@@ -5,7 +5,7 @@ USE_NLS = '${@base_conditional( "TARGET_OS", "linux-uclibc", "no", "", d )}'
 USE_NLS = '${@base_conditional( "TARGET_OS", "linux-uclibceabi", "no", "", d )}'
 
 EXTRA_OECONF_PATHS = "--with-local-prefix=${SDKPATH}/sysroots/${TUNE_PKGARCH}${TARGET_VENDOR}-${TARGET_OS}${target_exec_prefix} \
-                      --with-gxx-include-dir=${target_includedir}/c++ \
+                      --with-gxx-include-dir=${SDKPATH}/sysroots/${TUNE_PKGARCH}${TARGET_VENDOR}-${TARGET_OS}${target_includedir}/c++ \
                       --with-build-time-tools=${STAGING_DIR_NATIVE}${prefix_native}/${TARGET_SYS}/bin \
                       --with-sysroot=${SDKPATH}/sysroots/${TUNE_PKGARCH}${TARGET_VENDOR}-${TARGET_OS} \
                       --with-build-sysroot=${STAGING_DIR_TARGET}"