1 files changed, 29 insertions, 0 deletions
diff --git a/sys-devel/llvm/files/clang-3.1-gentoo-runtime-gcc-detection-v3.patch b/sys-devel/llvm/files/clang-3.1-gentoo-runtime-gcc-detection-v3.patch
new file mode 100644
index 000000000000..49f108533404
--- /dev/null
+++ b/sys-devel/llvm/files/clang-3.1-gentoo-runtime-gcc-detection-v3.patch
@@ -0,0 +1,29 @@
+diff -upNr a/llvm-3.1.src/tools/clang/lib/Driver/ToolChains.cpp b/llvm-3.1.src/tools/clang/lib/Driver/ToolChains.cpp
+--- a/llvm-3.1.src/tools/clang/lib/Driver/ToolChains.cpp	2012-05-24 03:32:31.593191000 -0400
++++ b/llvm-3.1.src/tools/clang/lib/Driver/ToolChains.cpp	2012-05-24 03:38:31.733163513 -0400
+@@ -1145,6 +1145,25 @@ Generic_GCC::GCCInstallationDetector::GC
+     Prefixes.push_back(D.InstalledDir + "/..");
+   }
+ 
++  llvm::OwningPtr<llvm::MemoryBuffer> File;
++  for (unsigned k = 0, ke = CandidateTripleAliases.size(); k < ke; ++k) {
++    if (!llvm::MemoryBuffer::getFile(D.SysRoot + "/etc/env.d/gcc/config-" + CandidateTripleAliases[k].str(), File))
++    {
++      bool Exists;
++      const std::string VersionText = File.get()->getBuffer().rsplit('-').second.substr(0,5).str();
++      const std::string GentooPath = D.SysRoot + "/usr/lib/gcc/" + CandidateTripleAliases[k].str() + "/" + VersionText;
++      if (!llvm::sys::fs::exists(GentooPath + "/crtbegin.o", Exists) && Exists)
++      {
++        Version = GCCVersion::Parse(VersionText);
++        GCCInstallPath = GentooPath;
++        GCCParentLibPath = GCCInstallPath + "/../../..";
++        GCCTriple.setTriple(CandidateTripleAliases[k]);
++        IsValid = true;
++        return;
++      }
++    }
++  }
++
+   // Loop over the various components which exist and select the best GCC
+   // installation available. GCC installs are ranked by version number.
+   Version = GCCVersion::Parse("0.0.0");