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llvm-project/clang/test/Driver/compiler-rt-unwind.c
Fangrui Song 1693009679 [Driver] Ensure ToolChain::LibraryPaths is not empty for non-Darwin 
Follow-up to #81037.

ToolChain::LibraryPaths holds the new compiler-rt library directory
(e.g. `/tmp/Debug/lib/clang/19/lib/x86_64-unknown-linux-gnu`). However,
it might be empty when the directory does not exist (due to the `if
(getVFS().exists(P))` change in https://reviews.llvm.org/D158475).

If neither the old/new compiler-rt library directories exists, we would
suggest the undesired old compiler-rt file name:

```
% /tmp/Debug/bin/clang++ a.cc -fsanitize=memory -o a
ld.lld: error: cannot open /tmp/Debug/lib/clang/19/lib/linux/libclang_rt.msan-x86_64.a: No such file or directory
clang++: error: linker command failed with exit code 1 (use -v to see invocation)
```

With this change, we will correctly suggest the new compiler-rt file name.

Fix #87150

Pull Request: https://github.com/llvm/llvm-project/pull/87866
2024-04-14 17:05:55 -07:00

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// General tests that the driver handles combinations of --rtlib=XXX and
// --unwindlib=XXX properly.
//
// RUN: %clang -### %s 2>&1 \
// RUN: --target=x86_64-unknown-linux -rtlib=libgcc --unwindlib=platform \
// RUN: -resource-dir=%S/Inputs/resource_dir \
// RUN: | FileCheck --check-prefix=RTLIB-GCC %s
// RTLIB-GCC: "-lgcc"
// RTLIB-GCC-SAME: "--as-needed"
// RTLIB-GCC-SAME: "-lgcc_s"
// RTLIB-GCC-SAME: "--no-as-needed"
//
// RUN: %clangxx -### %s 2>&1 \
// RUN: --target=x86_64-unknown-linux -rtlib=libgcc --unwindlib=platform \
// RUN: -resource-dir=%S/Inputs/resource_dir \
// RUN: | FileCheck --check-prefix=RTLIB-GXX %s
// RTLIB-GXX: "-lgcc"
// RTLIB-GXX-NOT: "--as-needed"
// RTLIB-GXX-SAME: "-lgcc_s"
// RTLIB-GXX-NOT: "--no-as-needed"
//
// RUN: not %clang -### %s 2>&1 \
// RUN: --target=x86_64-unknown-linux -rtlib=libgcc --unwindlib=libunwind \
// RUN: -resource-dir=%S/Inputs/resource_dir \
// RUN: | FileCheck --check-prefix=RTLIB-GCC-UNWINDLIB-COMPILER-RT %s
// RUN: not %clangxx -### %s 2>&1 \
// RUN: --target=x86_64-unknown-linux -rtlib=libgcc --unwindlib=libunwind \
// RUN: -resource-dir=%S/Inputs/resource_dir \
// RUN: | FileCheck --check-prefix=RTLIB-GCC-UNWINDLIB-COMPILER-RT %s
// RTLIB-GCC-UNWINDLIB-COMPILER-RT: "-lgcc"
// RTLIB-GCC-UNWINDLIB-COMPILER-RT-SAME: "--as-needed"
// RTLIB-GCC-UNWINDLIB-COMPILER-RT-SAME: "-lunwind"
// RTLIB-GCC-UNWINDLIB-COMPILER-RT-SAME: "--no-as-needed"
//
// RUN: not %clang -### %s 2>&1 \
// RUN: --target=x86_64-unknown-linux -rtlib=libgcc --unwindlib=libunwind \
// RUN: -shared-libgcc \
// RUN: -resource-dir=%S/Inputs/resource_dir \
// RUN: | FileCheck --check-prefix=RTLIB-GCC-SHARED-UNWINDLIB-COMPILER-RT %s
// RTLIB-GCC-SHARED-UNWINDLIB-COMPILER-RT: "-l:libunwind.so"
// RTLIB-GCC-SHARED-UNWINDLIB-COMPILER-RT-SAME: "-lgcc"
//
// RUN: not %clang -### %s 2>&1 \
// RUN: --target=x86_64-unknown-linux -rtlib=libgcc --unwindlib=libunwind \
// RUN: -static-libgcc \
// RUN: -resource-dir=%S/Inputs/resource_dir \
// RUN: | FileCheck --check-prefix=RTLIB-GCC-STATIC-UNWINDLIB-COMPILER-RT %s
// RTLIB-GCC-STATIC-UNWINDLIB-COMPILER-RT: "-lgcc"
// RTLIB-GCC-STATIC-UNWINDLIB-COMPILER-RT-SAME: "-l:libunwind.a"
//
// RUN: %clang -### %s 2>&1 \
// RUN: --target=x86_64-unknown-linux -rtlib=compiler-rt \
// RUN: -resource-dir=%S/Inputs/resource_dir \
// RUN: | FileCheck --check-prefix=RTLIB-COMPILER-RT %s
// RTLIB-COMPILER-RT: "{{.*}}libclang_rt.builtins.a"
//
// RUN: %clang -### %s 2>&1 \
// RUN: --target=x86_64-unknown-linux -rtlib=compiler-rt --unwindlib=libunwind \
// RUN: -resource-dir=%S/Inputs/resource_dir \
// RUN: | FileCheck --check-prefix=RTLIB-COMPILER-RT-UNWINDLIB-COMPILER-RT %s
// RUN: %clangxx -### %s 2>&1 \
// RUN: --target=x86_64-unknown-linux -rtlib=compiler-rt --unwindlib=libunwind \
// RUN: -resource-dir=%S/Inputs/resource_dir \
// RUN: | FileCheck --check-prefix=RTLIB-COMPILER-RT-UNWINDLIB-COMPILER-RT %s
// RTLIB-COMPILER-RT-UNWINDLIB-COMPILER-RT: "{{.*}}libclang_rt.builtins.a"
// RTLIB-COMPILER-RT-UNWINDLIB-COMPILER-RT-SAME: "--as-needed"
// RTLIB-COMPILER-RT-UNWINDLIB-COMPILER-RT-SAME: "-lunwind"
// RTLIB-COMPILER-RT-UNWINDLIB-COMPILER-RT-SAME: "--no-as-needed"
//
// RUN: %clang -### %s 2>&1 \
// RUN: --target=x86_64-unknown-linux -rtlib=compiler-rt --unwindlib=libgcc \
// RUN: -resource-dir=%S/Inputs/resource_dir \
// RUN: | FileCheck --check-prefix=RTLIB-COMPILER-RT-UNWINDLIB-GCC %s
// RTLIB-COMPILER-RT-UNWINDLIB-GCC: "{{.*}}libclang_rt.builtins.a"
// RTLIB-COMPILER-RT-UNWINDLIB-GCC-SAME: "-lgcc_s"
//
// RUN: %clang -### %s 2>&1 \
// RUN: --target=x86_64-unknown-linux -rtlib=compiler-rt --unwindlib=libgcc \
// RUN: -static -resource-dir=%S/Inputs/resource_dir \
// RUN: | FileCheck --check-prefix=RTLIB-COMPILER-RT-UNWINDLIB-GCC-STATIC %s
// RTLIB-COMPILER-RT-UNWINDLIB-GCC-STATIC: "{{.*}}libclang_rt.builtins.a"
// RTLIB-COMPILER-RT-UNWINDLIB-GCC-STATIC-SAME: "-lgcc_eh"
//
// RUN: not %clang %s 2> %t.err \
// RUN: --target=x86_64-unknown-linux -rtlib=libgcc --unwindlib=libunwind \
// RUN: -resource-dir=%S/Inputs/resource_dir \
// RUN: FileCheck --input-file=%t.err --check-prefix=RTLIB-GCC-UNWINDLIB-COMPILER_RT %s
// RTLIB-GCC-UNWINDLIB-COMPILER_RT: "{{[.|\\\n]*}}--rtlib=libgcc requires --unwindlib=libgcc"
//
// RUN: %clang -### %s 2>&1 \
// RUN: --target=x86_64-pc-windows-msvc -rtlib=compiler-rt --unwindlib=libunwind \
// RUN: -resource-dir=%S/Inputs/resource_dir \
// RUN: | FileCheck --check-prefix=MSVC-RTLIB-COMPILER-RT-UNWINDLIB-COMPILER-RT %s
// MSVC-RTLIB-COMPILER-RT-UNWINDLIB-COMPILER-RT: "{{.*}}clang_rt.builtins-x86_64.lib"
// MSVC-RTLIB-COMPILER-RT-UNWINDLIB-COMPILER-RT-NOT: "{{.*}}unwind.lib"
//
// RUN: %clang -### %s 2>&1 \
// RUN: --target=x86_64-w64-mingw32 -rtlib=compiler-rt --unwindlib=libunwind \
// RUN: -shared-libgcc \
// RUN: | FileCheck --check-prefix=MINGW-RTLIB-COMPILER-RT-SHARED-UNWINDLIB-COMPILER-RT %s
// MINGW-RTLIB-COMPILER-RT-SHARED-UNWINDLIB-COMPILER-RT: "{{.*}}libclang_rt.builtins.a"
// MINGW-RTLIB-COMPILER-RT-SHARED-UNWINDLIB-COMPILER-RT-SAME: "-l:libunwind.dll.a"
//
// RUN: %clang -### %s 2>&1 \
// RUN: --target=x86_64-w64-mingw32 -rtlib=compiler-rt --unwindlib=libunwind \
// RUN: -static-libgcc \
// RUN: | FileCheck --check-prefix=MINGW-RTLIB-COMPILER-RT-STATIC-UNWINDLIB-COMPILER-RT %s
// MINGW-RTLIB-COMPILER-RT-STATIC-UNWINDLIB-COMPILER-RT: "{{.*}}libclang_rt.builtins.a"
// MINGW-RTLIB-COMPILER-RT-STATIC-UNWINDLIB-COMPILER-RT-SAME: "-l:libunwind.a"
//
// RUN: %clang -### %s 2>&1 \
// RUN: --target=x86_64-w64-mingw32 -rtlib=compiler-rt --unwindlib=libunwind \
// RUN: | FileCheck --check-prefix=MINGW-RTLIB-COMPILER-RT-UNWINDLIB-COMPILER-RT %s
// RUN: %clangxx -### %s 2>&1 \
// RUN: --target=x86_64-w64-mingw32 -rtlib=compiler-rt --unwindlib=libunwind \
// RUN: | FileCheck --check-prefix=MINGW-RTLIB-COMPILER-RT-UNWINDLIB-COMPILER-RT %s
// MINGW-RTLIB-COMPILER-RT-UNWINDLIB-COMPILER-RT: "{{.*}}libclang_rt.builtins.a"
// MINGW-RTLIB-COMPILER-RT-UNWINDLIB-COMPILER-RT-SAME: "-lunwind"
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