glibc-testing: Specify location of c++ header files
Glibc test suite contains several c++ files. They are built
with g++ -nostdinc. In this case the location of c++ include files
needs to be specified explicitly, or the programs may fail to build.
The header locations are assumed to be:
sysroot/usr/include/c++/<version>
sysroot/usr/include/c++/<version>/<machine>
The new code parses "configparms" to get the actual CXX and sysroot
used for the glibc test suite, then it queries CXX to determine
CXX <version> and CXX <machine>. With the known values for <version>
and <machine> the code composes a new value for c++-sysincludes
and appends "configparms" with that value.
[YOCTO #7081]
Signed-off-by: Juro Bystricky <juro.bystricky@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
