MaskRay added a comment.
Can you dump the gcc search paths (include search paths and -L library search
paths) with and without `--enable-version-specific-runtime-libs`, like the
following?
% gcc a.c -v -xc /dev/null |& sed -E 's/ "?-[iIL]/\n&/
...
#include "..." search starts here:
#include <...> search starts here:
/usr/lib/gcc/x86_64-linux-gnu/11/include
/usr/local/include
/usr/include/x86_64-linux-gnu
/usr/include
...
-L/usr/lib/gcc/x86_64-linux-gnu/11
-L/usr/lib/gcc/x86_64-linux-gnu/11/../../../x86_64-linux-gnu
-L/usr/lib/gcc/x86_64-linux-gnu/11/../../../../lib
-L/lib/x86_64-linux-gnu
-L/lib/../lib
-L/usr/lib/x86_64-linux-gnu
-L/usr/lib/../lib
-L/usr/lib/gcc/x86_64-linux-gnu/11/../../.. /tmp/cc7IN3uz.o ...
For driver tests, it is recommended to test `-DCLANG_DEFAULT_CXX_STDLIB=libc++
-DCLANG_DEFAULT_UNWINDLIB=libunwind -DCLANG_DEFAULT_RTLIB=compiler-rt` beside
the default build to ensure --stdlib= and --rtlib are correctly set.
================
Comment at: clang/test/Driver/gcc-toolchain-rt-libs-multi.cpp:1
+// RUN: (%clangxx %s -v
--gcc-toolchain=%S/Inputs/gcc_version_parsing_rt_libs_multilib
--target=x86_64-redhat-linux 2>&1 || true) | FileCheck %s -check-prefix=X64
+// RUN: (%clangxx %s -m32 -v
--gcc-toolchain=%S/Inputs/gcc_version_parsing_rt_libs_multilib
--target=x86_64-redhat-linux 2>&1 || true) | FileCheck %s -check-prefix=X32
----------------
No need for `( ... ) | ...`. Just use plain `... 2>&1 | FileCheck ...`
================
Comment at: clang/test/Driver/gcc-toolchain-rt-libs-multi.cpp:6
+
+// X64: {{[^ ]*}}clang{{[^ ]*}}" -cc1
+// X64-SAME: -internal-isystem {{[^
]*}}gcc_version_parsing_rt_libs_multilib/lib/gcc/x86_64-redhat-linux/10.2.0/../../../gcc/x86_64-redhat-linux/10.2.0/include/c++
----------------
Consider the form in `linux-cross.cpp`.
Avoid testing `clang`. The extra information is not needed and causes trouble
to Windows and some build environments where `%clang` resolves to a file not
named `clang`.
================
Comment at: clang/test/Driver/gcc-toolchain-rt-libs-multi.cpp:17
+// X32-SAME: -L{{[^
]*}}gcc_version_parsing_rt_libs_multilib/lib/gcc/x86_64-redhat-linux/10.2.0/../lib32
+
----------------
no trailing blank line
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D118700/new/
https://reviews.llvm.org/D118700
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