From 233deb82f3b1c9b66b33b709426ab76bd274bb75 Mon Sep 17 00:00:00 2001 From: Marius Bakke Date: Fri, 21 Feb 2020 17:07:39 +0100 Subject: gnu: clang@9: Fix search path handling. * gnu/packages/patches/clang-9.0-libc-search-path.patch: New file. * gnu/local.mk (dist_patch_DATA): Adjust accordingly. * gnu/packages/llvm.scm (clang-9): Add #:patches. --- .../patches/clang-9.0-libc-search-path.patch | 83 ++++++++++++++++++++++ 1 file changed, 83 insertions(+) create mode 100644 gnu/packages/patches/clang-9.0-libc-search-path.patch (limited to 'gnu/packages/patches') diff --git a/gnu/packages/patches/clang-9.0-libc-search-path.patch b/gnu/packages/patches/clang-9.0-libc-search-path.patch new file mode 100644 index 0000000000..be34344842 --- /dev/null +++ b/gnu/packages/patches/clang-9.0-libc-search-path.patch @@ -0,0 +1,83 @@ +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 non-GuixSD systems. + +diff --git a/lib/Driver/ToolChains/Linux.cpp b/lib/Driver/ToolChains/Linux.cpp +--- 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. ++#if 0 + Distro Distro(D.getVFS()); + + if (Distro.IsAlpineLinux() || Triple.isAndroid()) { +@@ -306,6 +309,7 @@ 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. +@@ -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); + } +@@ -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 + + // 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 + 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) + if (StringRef(D.Dir).startswith(SysRoot)) + addPathIfExists(D, D.Dir + "/../lib", Paths); + +- addPathIfExists(D, SysRoot + "/lib", Paths); +- addPathIfExists(D, SysRoot + "/usr/lib", Paths); ++ // 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); + } + + ToolChain::CXXStdlibType Linux::GetDefaultCXXStdlibType() const { -- cgit v1.2.3