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author | Mathieu Othacehe <othacehe@gnu.org> | 2021-10-12 16:50:47 +0000 |
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committer | Mathieu Othacehe <othacehe@gnu.org> | 2021-10-12 17:46:23 +0000 |
commit | a1eca979fb8da842e73c42f4f53be29b169810f2 (patch) | |
tree | 681c7283e412bb8a29c2531c4408b49c3e184764 /gnu/packages/patches/clang-12.0-libc-search-path.patch | |
parent | 48d86a9ec6d8d2e97da2299ea41a03ef4cdaab83 (diff) | |
parent | 371aa5777a3805a3886f3feea5f1960fe3fe4219 (diff) | |
download | guix-a1eca979fb8da842e73c42f4f53be29b169810f2.tar.gz guix-a1eca979fb8da842e73c42f4f53be29b169810f2.zip |
Merge remote-tracking branch 'origin/master' into core-updates-frozen.
Diffstat (limited to 'gnu/packages/patches/clang-12.0-libc-search-path.patch')
-rw-r--r-- | gnu/packages/patches/clang-12.0-libc-search-path.patch | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/gnu/packages/patches/clang-12.0-libc-search-path.patch b/gnu/packages/patches/clang-12.0-libc-search-path.patch new file mode 100644 index 0000000000..38de275048 --- /dev/null +++ b/gnu/packages/patches/clang-12.0-libc-search-path.patch @@ -0,0 +1,84 @@ +Clang attempts to guess file names based on the OS and distro (yes!), +but unfortunately, that doesn't work for us. + +This patch makes it easy to insert libc's $libdir so that Clang passes the +correct absolute file name of crt1.o etc. to 'ld'. It also disables all +the distro-specific stuff and removes the hard-coded FHS directory names +to make sure Clang also works on foreign distros. + +diff --git a/lib/Driver/Distro.cpp b/lib/Driver/Distro.cpp +index ee4fe841..f0313bbe 100644 +--- a/lib/Driver/Distro.cpp ++++ b/lib/Driver/Distro.cpp +@@ -93,6 +93,10 @@ static Distro::DistroType DetectLsbRelease(llvm::vfs::FileSystem &VFS) { + } + + static Distro::DistroType DetectDistro(llvm::vfs::FileSystem &VFS) { ++ // The compiler should always behave the same, even when used via Guix on a ++ // foreign distro. ++ return Distro::UnknownDistro; ++ + Distro::DistroType Version = Distro::UnknownDistro; + + // Newer freedesktop.org's compilant systemd-based systems +diff --git a/lib/Driver/ToolChains/Cuda.cpp b/lib/Driver/ToolChains/Cuda.cpp +index d14776c5..88bc3ccd 100644 +--- a/lib/Driver/ToolChains/Cuda.cpp ++++ b/lib/Driver/ToolChains/Cuda.cpp +@@ -119,6 +119,9 @@ CudaInstallationDetector::CudaInstallationDetector( + const Driver &D, const llvm::Triple &HostTriple, + const llvm::opt::ArgList &Args) + : D(D) { ++ // Don't look for CUDA in /usr. ++ return; ++ + struct Candidate { + std::string Path; + bool StrictChecking; +diff --git a/lib/Driver/ToolChains/Linux.cpp b/lib/Driver/ToolChains/Linux.cpp +index 9663a739..107f96d6 100644 +--- a/lib/Driver/ToolChains/Linux.cpp ++++ b/lib/Driver/ToolChains/Linux.cpp +@@ -223,6 +223,9 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args) + + Generic_GCC::PushPPaths(PPaths); + ++ // Comment out the distro-specific tweaks so that they don't bite when ++ // using Guix on a foreign distro. ++#if 0 + Distro Distro(D.getVFS(), Triple); + + if (Distro.IsAlpineLinux() || Triple.isAndroid()) { +@@ -288,6 +291,7 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args) + + if (IsAndroid || Distro.IsOpenSUSE()) + ExtraOpts.push_back("--enable-new-dtags"); ++#endif + + // The selection of paths to try here is designed to match the patterns which + // the GCC driver itself uses, as this is part of the GCC-compatible driver. +@@ -301,6 +305,7 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args) + + Generic_GCC::AddMultilibPaths(D, SysRoot, OSLibDir, MultiarchTriple, Paths); + ++#if 0 + // Similar to the logic for GCC above, if we currently running Clang inside + // of the requested system root, add its parent library paths to + // those searched. +@@ -352,9 +357,14 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args) + // directory ('Dir' below) or the ResourceDir. + if (StringRef(D.Dir).startswith(SysRoot)) + addPathIfExists(D, D.Dir + "/../lib", Paths); ++#endif ++ ++ // Add libc's lib/ directory to the search path, so that crt1.o, crti.o, ++ // and friends can be found. ++ addPathIfExists(D, "@GLIBC_LIBDIR@", Paths); + +- addPathIfExists(D, SysRoot + "/lib", Paths); +- addPathIfExists(D, SysRoot + "/usr/lib", Paths); ++ // Add GCC's lib/ directory so libstdc++.so can be found. ++ addPathIfExists(D, GCCInstallation.getParentLibPath(), Paths); + } + + ToolChain::CXXStdlibType Linux::GetDefaultCXXStdlibType() const { |