diff options
| -rw-r--r-- | gnu/packages/patches/clang-9.0-libc-search-path.patch | 90 |
1 files changed, 50 insertions, 40 deletions
diff --git a/gnu/packages/patches/clang-9.0-libc-search-path.patch b/gnu/packages/patches/clang-9.0-libc-search-path.patch index be34344842..1984895a9c 100644 --- a/gnu/packages/patches/clang-9.0-libc-search-path.patch +++ b/gnu/packages/patches/clang-9.0-libc-search-path.patch @@ -4,17 +4,47 @@ 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 non-GuixSD systems. +to make sure Clang also works on foreign distros. +diff --git a/lib/Driver/Distro.cpp b/lib/Driver/Distro.cpp +index f2a3074d..536db89c 100644 +--- a/lib/Driver/Distro.cpp ++++ b/lib/Driver/Distro.cpp +@@ -18,6 +18,10 @@ using namespace clang::driver; + using namespace clang; + + 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; ++ + llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> File = + VFS.getBufferForFile("/etc/lsb-release"); + if (File) { +diff --git a/lib/Driver/ToolChains/Cuda.cpp b/lib/Driver/ToolChains/Cuda.cpp +index 96f8c513..64fd7a26 100644 +--- a/lib/Driver/ToolChains/Cuda.cpp ++++ b/lib/Driver/ToolChains/Cuda.cpp +@@ -69,6 +69,9 @@ 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 7f59bc77..67d8ce22 100644 --- a/lib/Driver/ToolChains/Linux.cpp +++ b/lib/Driver/ToolChains/Linux.cpp @@ -240,6 +240,9 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args) .str()); } -+// Comment out the distro-specific tweaks so that they don't bite when -+// using Guix on a foreign distro. ++ // 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()); @@ -27,57 +57,37 @@ diff --git a/lib/Driver/ToolChains/Linux.cpp b/lib/Driver/ToolChains/Linux.cpp // 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. -@@ -363,7 +367,7 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args) - // the cross. Note that GCC does include some of these directories in some - // configurations but this seems somewhere between questionable and simply - // a bug. -- if (StringRef(LibPath).startswith(SysRoot)) { -+ if (0) { - addPathIfExists(D, LibPath + "/" + MultiarchTriple, Paths); - addPathIfExists(D, LibPath + "/../" + OSLibDir, Paths); +@@ -369,6 +373,7 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args) } -@@ -382,6 +386,8 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args) - addPathIfExists(D, SysRoot + "/lib/" + MultiarchTriple, Paths); - addPathIfExists(D, SysRoot + "/lib/../" + OSLibDir, Paths); - -+// This requires the commented distro tweaks above. -+#if 0 - if (IsAndroid) { - // Android sysroots contain a library directory for each supported OS - // version as well as some unversioned libraries in the usual multiarch -@@ -410,10 +416,15 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args) - addPathIfExists(D, SysRoot + "/" + OSLibDir + "/" + ABIName, Paths); - addPathIfExists(D, SysRoot + "/usr/" + OSLibDir + "/" + ABIName, Paths); } -+#endif ++#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. +@@ -414,6 +419,8 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args) // Try walking via the GCC triple path in case of biarch or multiarch GCC // installations with strange symlinks. if (GCCInstallation.isValid()) { -+ -+// The following code would end up adding things like -+// "/usr/lib/x86_64-unknown-linux-gnu/../../lib64" to the search path. -+#if 0 ++ // The following code would end up adding things like ++ // "/usr/lib/x86_64-unknown-linux-gnu/../../lib64" to the search path. addPathIfExists(D, SysRoot + "/usr/lib/" + GCCInstallation.getTriple().str() + "/../../" + OSLibDir, -@@ -426,6 +437,7 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args) - BiarchSibling.gccSuffix(), - Paths); - } -+#endif - - // See comments above on the multilib variant for details of why this is - // included even from outside the sysroot. -@@ -450,8 +462,9 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args) +@@ -449,9 +456,14 @@ 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); - -- addPathIfExists(D, SysRoot + "/lib", Paths); -- addPathIfExists(D, SysRoot + "/usr/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 { |