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-rw-r--r--gnu/packages/patches/clang-3.8-libc-search-path.patch69
1 files changed, 69 insertions, 0 deletions
diff --git a/gnu/packages/patches/clang-3.8-libc-search-path.patch b/gnu/packages/patches/clang-3.8-libc-search-path.patch
new file mode 100644
index 0000000000..0f7d0a4add
--- /dev/null
+++ b/gnu/packages/patches/clang-3.8-libc-search-path.patch
@@ -0,0 +1,69 @@
+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.
+
+This patch makes slight adjustments over "clang-libc-search-path.patch" for
+changes in clang 3.8.
+
+--- cfe-3.8.0.src/lib/Driver/ToolChains.cpp
++++ cfe-3.8.0.src/lib/Driver/ToolChains.cpp
+@@ -3661,6 +3661,9 @@
+ GCCInstallation.getTriple().str() + "/bin")
+ .str());
+
++ // Comment out the distro-specific tweaks so that they don't bite when
++ // using Guix on a foreign distro.
++#if 0
+ Distro Distro = DetectDistro(D, Arch);
+
+ if (IsOpenSUSE(Distro) || IsUbuntu(Distro)) {
+@@ -3702,6 +3705,7 @@
+
+ if (IsOpenSUSE(Distro))
+ 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.
+@@ -3771,14 +3775,12 @@
+ addPathIfExists(D, D.Dir + "/../" + OSLibDir, Paths);
+ }
+
+- addPathIfExists(D, SysRoot + "/lib/" + MultiarchTriple, Paths);
+- addPathIfExists(D, SysRoot + "/lib/../" + OSLibDir, Paths);
+- addPathIfExists(D, SysRoot + "/usr/lib/" + MultiarchTriple, Paths);
+- addPathIfExists(D, SysRoot + "/usr/lib/../" + OSLibDir, Paths);
+-
+ // 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,
+@@ -3791,6 +3793,7 @@
+ BiarchSibling.gccSuffix(),
+ Paths);
+ }
++#endif
+
+ // See comments above on the multilib variant for details of why this is
+ // included even from outside the sysroot.
+@@ -3815,8 +3818,9 @@
+ 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);
+ }
+
+ bool Linux::HasNativeLLVMSupport() const { return true; }