96 lines
3.7 KiB
Diff
96 lines
3.7 KiB
Diff
Clang attempts to guess file names based on the OS and distro (yes!),
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but unfortunately, that doesn't work for us.
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This patch makes it easy to insert libc's $libdir so that Clang passes the
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correct absolute file name of crt1.o etc. to 'ld'. It also disables all
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the distro-specific stuff and removes the hard-coded FHS directory names
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to make sure Clang also works on foreign distros.
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diff --git a/clang/lib/Driver/Distro.cpp b/clang/lib/Driver/Distro.cpp
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index 87a0c5a58511..86ea82eda4b5 100644
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--- a/clang/lib/Driver/Distro.cpp
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+++ b/clang/lib/Driver/Distro.cpp
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@@ -98,6 +98,10 @@ static Distro::DistroType DetectLsbRelease(llvm::vfs::FileSystem &VFS) {
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}
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static Distro::DistroType DetectDistro(llvm::vfs::FileSystem &VFS) {
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+ // The compiler should always behave the same, even when used via Guix on a
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+ // foreign distro.
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+ return Distro::UnknownDistro;
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+
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Distro::DistroType Version = Distro::UnknownDistro;
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// Newer freedesktop.org's compilant systemd-based systems
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diff --git a/clang/lib/Driver/ToolChains/Cuda.cpp b/clang/lib/Driver/ToolChains/Cuda.cpp
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index aa125bb308e8..8b86e144054c 100644
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--- a/clang/lib/Driver/ToolChains/Cuda.cpp
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+++ b/clang/lib/Driver/ToolChains/Cuda.cpp
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@@ -124,6 +124,9 @@ CudaInstallationDetector::CudaInstallationDetector(
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const Driver &D, const llvm::Triple &HostTriple,
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const llvm::opt::ArgList &Args)
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: D(D) {
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+ // Don't look for CUDA in /usr.
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+ return;
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+
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struct Candidate {
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std::string Path;
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bool StrictChecking;
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diff --git a/clang/lib/Driver/ToolChains/Linux.cpp b/clang/lib/Driver/ToolChains/Linux.cpp
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index c6fb290ffdb4..4736f4bb3392 100644
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--- a/clang/lib/Driver/ToolChains/Linux.cpp
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+++ b/clang/lib/Driver/ToolChains/Linux.cpp
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@@ -189,6 +189,10 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
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Generic_GCC::PushPPaths(PPaths);
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+ // Comment out the distro-specific tweaks so that they don't bite when
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+ // using Guix on a foreign distro.
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+#if 0
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+
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Distro Distro(D.getVFS(), Triple);
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if (Distro.IsAlpineLinux() || Triple.isAndroid()) {
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@@ -249,6 +253,7 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
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#ifdef ENABLE_LINKER_BUILD_ID
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ExtraOpts.push_back("--build-id");
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+#endif
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#endif
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// The selection of paths to try here is designed to match the patterns which
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@@ -270,6 +275,7 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
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}
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Generic_GCC::AddMultilibPaths(D, SysRoot, OSLibDir, MultiarchTriple, Paths);
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+#if 0
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addPathIfExists(D, concat(SysRoot, "/lib", MultiarchTriple), Paths);
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addPathIfExists(D, concat(SysRoot, "/lib/..", OSLibDir), Paths);
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@@ -298,9 +304,11 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
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addPathIfExists(D, concat(SysRoot, "/", OSLibDir, ABIName), Paths);
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addPathIfExists(D, concat(SysRoot, "/usr", OSLibDir, ABIName), Paths);
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}
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+#endif
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Generic_GCC::AddMultiarchPaths(D, SysRoot, OSLibDir, Paths);
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+#if 0
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// The deprecated -DLLVM_ENABLE_PROJECTS=libcxx configuration installs
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// libc++.so in D.Dir+"/../lib/". Detect this path.
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// TODO Remove once LLVM_ENABLE_PROJECTS=libcxx is unsupported.
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@@ -310,6 +318,14 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
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addPathIfExists(D, concat(SysRoot, "/lib"), Paths);
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addPathIfExists(D, concat(SysRoot, "/usr/lib"), Paths);
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+#endif
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+
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+ // Add libc's lib/ directory to the search path, so that crt1.o, crti.o,
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+ // and friends can be found.
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+ addPathIfExists(D, "@GLIBC_LIBDIR@", Paths);
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+
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+ // Add GCC's lib/ directory so libstdc++.so can be found.
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+ addPathIfExists(D, GCCInstallation.getParentLibPath(), Paths);
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}
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ToolChain::RuntimeLibType Linux::GetDefaultRuntimeLibType() const {
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