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authorMarius Bakke <marius@gnu.org>2020-10-18 17:34:54 +0200
committerMarius Bakke <marius@gnu.org>2020-10-19 00:12:31 +0200
commit7f79358def1bba3f123f7abb20e521c558158d0e (patch)
tree50e48560d4dc3084c32d3327ad05f39174f8d688 /gnu/packages/patches/clang-11.0-libc-search-path.patch
parentf1db068adbaa78340c33822910f15ed357e9e36e (diff)
gnu: LLVM, Clang: Add 11.0.0.
* gnu/packages/patches/clang-11.0-libc-search-path.patch: New file. * gnu/local.mk (dist_patch_DATA): Adjust accordingly. * gnu/packages/llvm.scm (llvm-11, clang-runtime-11, clang-11, clang-toolchain-11): New variables.
Diffstat (limited to 'gnu/packages/patches/clang-11.0-libc-search-path.patch')
-rw-r--r--gnu/packages/patches/clang-11.0-libc-search-path.patch89
1 files changed, 89 insertions, 0 deletions
diff --git a/gnu/packages/patches/clang-11.0-libc-search-path.patch b/gnu/packages/patches/clang-11.0-libc-search-path.patch
new file mode 100644
index 0000000000..c014de179d
--- /dev/null
+++ b/gnu/packages/patches/clang-11.0-libc-search-path.patch
@@ -0,0 +1,89 @@
+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-Guix systems.
+
+diff --git a/lib/Driver/ToolChains/Gnu.cpp b/lib/Driver/ToolChains/Gnu.cpp
+--- a/lib/Driver/ToolChains/Gnu.cpp
++++ b/lib/Driver/ToolChains/Gnu.cpp
+@@ -2797,7 +2797,7 @@ void Generic_GCC::AddMultilibPaths(const Driver &D,
+ // 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);
+ }
+@@ -2811,6 +2811,10 @@ void Generic_GCC::AddMultiarchPaths(const Driver &D,
+ // 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,
+@@ -2823,6 +2827,7 @@ void Generic_GCC::AddMultiarchPaths(const Driver &D,
+ D, GCCInstallation.getInstallPath() + BiarchSibling.gccSuffix(),
+ Paths);
+ }
++#endif // Guix
+
+ // See comments above on the multilib variant for details of why this is
+ // included even from outside the sysroot.
+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
+@@ -219,6 +219,9 @@ 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()) {
+@@ -284,6 +287,7 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
+
+ if (IsAndroid || Distro.IsOpenSUSE())
+ ExtraOpts.push_back("--enable-new-dtags");
++#endif // Guix
+
+ // 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.
+@@ -310,6 +314,8 @@ 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
+@@ -338,6 +344,7 @@ 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 // Guix
+
+ Generic_GCC::AddMultiarchPaths(D, SysRoot, OSLibDir, Paths);
+
+@@ -349,8 +356,9 @@ 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 {