manojgupta added a comment.
I think the tests are already broken in Gentoo when clang is installed in
/usr/bin even without this patch. The tests only work if clang binary is not
installed in /usr/bin.
RootCause is the existing lines in Gnu.cpp:
// Then look for gcc installed alongside clang.
Prefixes.push_back(D.InstalledDir + "/..");
e.g. Specified debian sysroot is not picked as expected for the following
command line.
$ clang -v --target=i386-unknown-linux --gcc-toolchain=""
--sysroot=test/Driver/Inputs/debian_multiarch_tree 2>&1
clang version 7.0.0
Target: i386-unknown-linux
Thread model: posix
InstalledDir: /usr/bin
Found candidate GCC installation: /usr/bin/../lib/gcc/i686-pc-linux-gnu/4.9.x
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-pc-linux-gnu/4.9.x
Found candidate GCC installation:
/usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/4.9.x
Found candidate GCC installation:
test/Driver/Inputs/debian_multiarch_tree/usr/lib/gcc/i686-linux-gnu/4.5
Found candidate GCC installation:
test/Driver/Inputs/debian_multiarch_tree/usr/lib/gcc/x86_64-linux-gnu/4.5
Selected GCC installation: /usr/bin/../lib/gcc/i686-pc-linux-gnu/4.9.x
Candidate multilib: .;@m32
Selected multilib: .;@m32
Repository:
rC Clang
https://reviews.llvm.org/D45233
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