[PATCH v4] Add TEST_CC and TEST_CXX support

[Sam James]

Sam James <sam@gentoo.org> writes:

> "H.J. Lu" <hjl.tools@gmail.com> writes:
>
>> Support testing glibc build with a different C compiler or a different
>> C++ compiler with
>>
>> $ ../glibc-VERSION/configure TEST_CC="gcc-6.4.1" TEST_CXX="gi++-6.4.1"
>>
>> 1. Also check compiler options with TEST_CC and TEST_CXX.
>> 2. Add check and xcheck targets to Makefile.in and override build compiler
>> options with ones from TEST_CC and TEST_CXX.
>>
>> Tested on Fedora 41/x86-64, building with GCC 14.2.1 and testing with
>> GCC 11.2.1.
>>
>> Rebase against master.
>>
>> It doesn't work with older GCC yet.
>
> It looks good, but testing it with GCC trunk as default system `gcc` and then TEST_CC as
> GCC 14, I see:
> ../scripts/evaluate-test.sh nptl/tst-cleanupx4 $? false false > /tmp/glibc-bld/nptl/tst-cleanupx4.test-result
> /tmp/glibc-bld/nptl/tst-cleanupx4: error while loading shared libraries:
> libgcc_s.so.1: cannot open shared object file: No such file or directory
>
> $ cat nptl/tst-cleanup0.out
> libgcc_s.so.1 must be installed for pthread_cancel to work
> Didn't expect signal from child: got `Aborted'

Actually, I see others like this without TEST_CC, so please ignore. I'll
investigate that.