Comment # 4 on bug 1051881 from Michal Srb

Sorry, I was busy with other llvm issues, now I finally have time to dig into
this one.

(In reply to Martin Li��ka from comment #0)
> But it does not work properly with -m32. Note the code in DetectDistro.cpp
> checks for /etc/SuSE-release, which is legacy. One should use
> /etc/os-release. I can fix that after we resolve this issue.

So far I don't think the issue comes from here. The whole DetectDistro function
is removed and Distro::OpenSUSE is returned unconditionally. The
"/etc/SuSE-release" file is not even read.

It seems that clang correctly discovers that the 32bit gcc is in
"/usr/lib64/gcc/x86_64-suse-linux/7/32". It links with some files from that
directory (for example crtcend.o or libgcc_s.so), which is correct.

However, it fails to detect the right place for glibc files. It discovers them
in "/usr/bin/../lib64/gcc/x86_64-suse-linux/7/../../.." = "/usr/lib64"
directory. It seems that clang does not expect the 32bit gcc to be under the
/usr/lib64 directory. We will probably need special case for finding the glibc.