diff -upNr a/llvm-3.0.src/tools/clang/lib/Driver/ToolChains.cpp b/llvm-3.0.src/tools/clang/lib/Driver/ToolChains.cpp
--- a/llvm-3.0.src/tools/clang/lib/Driver/ToolChains.cpp	2012-05-23 15:45:01.333127000 -0400
+++ b/llvm-3.0.src/tools/clang/lib/Driver/ToolChains.cpp	2012-05-23 16:16:26.023642076 -0400
@@ -1215,6 +1215,16 @@ FreeBSD::FreeBSD(const HostInfo &Host, c
   } else {
     getFilePaths().push_back("/usr/lib");
   }
+
+  llvm::OwningPtr<llvm::MemoryBuffer> File;
+  if (!llvm::MemoryBuffer::getFile("/etc/env.d/gcc/config-" + getDriver().DefaultHostTriple, File))
+  {
+    bool Exists;
+    StringRef Version = File.get()->getBuffer().rsplit('-').second.substr(0,5);
+    const std::string GentooPath = "/usr/lib/gcc/" + getDriver().DefaultHostTriple + "/" + Version.str();
+    if (!llvm::sys::fs::exists(GentooPath + "/crtbegin.o", Exists) && Exists)
+      getFilePaths().push_back(GentooPath);
+  }
 }
 
 Tool &FreeBSD::SelectTool(const Compilation &C, const JobAction &JA,