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Restore that for now, we're not GenToo ...
https://reviews.llvm.org/D148945
https://reviews.llvm.org/D122444
Index: llvm-toolchain-snapshot_19~++20240424094944+78ebaa2d798f/clang/lib/Driver/ToolChains/Linux.cpp
===================================================================
--- llvm-toolchain-snapshot_19~++20240424094944+78ebaa2d798f.orig/clang/lib/Driver/ToolChains/Linux.cpp
+++ llvm-toolchain-snapshot_19~++20240424094944+78ebaa2d798f/clang/lib/Driver/ToolChains/Linux.cpp
@@ -345,6 +345,13 @@ Linux::Linux(const Driver &D, const llvm
Generic_GCC::AddMultiarchPaths(D, SysRoot, OSLibDir, Paths);
+ // The deprecated -DLLVM_ENABLE_PROJECTS=libcxx configuration installs
+ // libc++.so in D.Dir+"/../lib/". Detect this path.
+ // TODO Remove once LLVM_ENABLE_PROJECTS=libcxx is unsupported.
+ if (StringRef(D.Dir).starts_with(SysRoot) &&
+ D.getVFS().exists(D.Dir + "/../lib/libc++.so"))
+ addPathIfExists(D, D.Dir + "/../lib", Paths);
+
addPathIfExists(D, concat(SysRoot, "/lib"), Paths);
addPathIfExists(D, concat(SysRoot, "/usr/lib"), Paths);
}
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