[PATCH v5] Add TEST_CC and TEST_CXX support

[H.J. Lu]

On Mon, Dec 9, 2024 at 9:17 AM Sam James <sam@gentoo.org> wrote:
>
> "H.J. Lu" <hjl.tools@gmail.com> writes:
>
> > Changes in v5:
> >
> > 1. Fix a typo.
> > 2. Update sysdeps/x86_64/configure.ac for GCC 6
> >
> > ---
> > 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="g++-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:
> >
> > 1. Building with GCC 14.2.1 and testing with GCC 6.4.1 and GCC 11.2.1.
> > 2. Building with GCC 15 and testing with GCC 6.4.1.
> >
> > Support for GCC versions older than GCC 6.2 may need to change the test
> > sources.  Other targets may need to update configure.ac under sysdeps and
> > modify Makefile.in to override target build compiler options.
>
> Please fix sysdeps/x86_64/configure.ac's libc_cv_test_x86_have_amx_tile
> check which fails to restore CC.

Fixed in v6.

-- 
H.J.