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| author | Fangrui Song <i@maskray.me> | 2021-03-21 12:01:44 -0700 |
|---|---|---|
| committer | Fangrui Song <i@maskray.me> | 2021-03-21 12:01:44 -0700 |
| commit | bcaca360f8b64d267c787a5f3088e73420e78f53 (patch) | |
| tree | 8565cbc46b526f2314c1be1526edff0f148336e5 /clang/lib/CodeGen/CodeGenFunction.cpp | |
| parent | c53a1322f329e29446c7625da423f58f09ec1a55 (diff) | |
| download | llvm-bcaca360f8b64d267c787a5f3088e73420e78f53.zip llvm-bcaca360f8b64d267c787a5f3088e73420e78f53.tar.gz llvm-bcaca360f8b64d267c787a5f3088e73420e78f53.tar.bz2 | |
[Driver] Gnu.cpp: fix libstdc++ search path for multilib
With this change, on Debian x86-64 (with a MULTILIB_OSDIRNAMES local patch
../lib64 -> ../lib; this does not matter because /usr/lib64/crt{1,i,n}.o do not exist),
`clang++ --target=aarch64-linux-gnu a.cc -Wl,--dynamic-linker=/usr/aarch64-linux-gnu/lib/ld-linux-aarch64.so.1 -Wl,-rpath,/usr/aarch64-linux-gnu/lib`
built executable can run under qemu-user. Previously this failed with
`/usr/lib/gcc-cross/aarch64-linux-gnu/10/../../../../include/c++/10/iostream:38:10: fatal error: 'bits/c++config.h' file not found`
On Arch Linux, due to the MULTILIB_OSDIRNAMES patch and the existence of
/usr/lib64/crt{1,i,n}.o, clang driver may pick
/usr/lib64/crt{1,i,n}.o and cause a linker error. -B can work around the problem.
`clang++ --target=aarch64-linux-gnu -B /usr/aarch64-linux-gnu/lib a.cc -Wl,--dynamic-linker=/usr/aarch64-linux-gnu/lib/ld-linux-aarch64.so.1 -Wl,-rpath,/usr/aarch64-linux-gnu/lib64:/usr/aarch64-linux-gnu/lib`
Diffstat (limited to 'clang/lib/CodeGen/CodeGenFunction.cpp')
0 files changed, 0 insertions, 0 deletions