1 files changed, 90 insertions, 0 deletions
diff --git a/sys-devel/llvm/files/clang-3.3-gcc-header-path.patch b/sys-devel/llvm/files/clang-3.3-gcc-header-path.patch
new file mode 100644
index 000000000000..dc9a4f7bb79c
--- /dev/null
+++ b/sys-devel/llvm/files/clang-3.3-gcc-header-path.patch
@@ -0,0 +1,90 @@
+Backport handling of 'g++-vX.Y' header location.
+
+Fixes: https://bugs.gentoo.org/show_bug.cgi?id=487584
+---
+ tools/clang/lib/Driver/ToolChains.cpp | 20 ++++++++++++--------
+ tools/clang/lib/Driver/ToolChains.h   |  3 +++
+ 2 files changed, 15 insertions(+), 8 deletions(-)
+
+diff --git a/tools/clang/lib/Driver/ToolChains.cpp b/tools/clang/lib/Driver/ToolChains.cpp
+index 7c9e9c0..e38d42d 100644
+--- a/tools/clang/lib/Driver/ToolChains.cpp
++++ b/tools/clang/lib/Driver/ToolChains.cpp
+@@ -917,17 +917,19 @@ Darwin_Generic_GCC::ComputeEffectiveClangTriple(const ArgList &Args,
+ /// This is the primary means of forming GCCVersion objects.
+ /*static*/
+ Generic_GCC::GCCVersion Linux::GCCVersion::Parse(StringRef VersionText) {
+-  const GCCVersion BadVersion = { VersionText.str(), -1, -1, -1, "" };
++  const GCCVersion BadVersion = { VersionText.str(), -1, -1, -1, "", "", "" };
+   std::pair<StringRef, StringRef> First = VersionText.split('.');
+   std::pair<StringRef, StringRef> Second = First.second.split('.');
+ 
+-  GCCVersion GoodVersion = { VersionText.str(), -1, -1, -1, "" };
++  GCCVersion GoodVersion = { VersionText.str(), -1, -1, -1, "", "", "" };
+   if (First.first.getAsInteger(10, GoodVersion.Major) ||
+       GoodVersion.Major < 0)
+     return BadVersion;
++  GoodVersion.MajorStr = First.first.str();
+   if (Second.first.getAsInteger(10, GoodVersion.Minor) ||
+       GoodVersion.Minor < 0)
+     return BadVersion;
++  GoodVersion.MinorStr = Second.first.str();
+ 
+   // First look for a number prefix and parse that if present. Otherwise just
+   // stash the entire patch string in the suffix, and leave the number
+@@ -945,7 +947,7 @@ Generic_GCC::GCCVersion Linux::GCCVersion::Parse(StringRef VersionText) {
+       if (PatchText.slice(0, EndNumber).getAsInteger(10, GoodVersion.Patch) ||
+           GoodVersion.Patch < 0)
+         return BadVersion;
+-      GoodVersion.PatchSuffix = PatchText.substr(EndNumber).str();
++      GoodVersion.PatchSuffix = PatchText.substr(EndNumber);
+     }
+   }
+ 
+@@ -2590,11 +2592,11 @@ void Linux::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs,
+   // equivalent to '/usr/include/c++/X.Y' in almost all cases.
+   StringRef LibDir = GCCInstallation.getParentLibPath();
+   StringRef InstallDir = GCCInstallation.getInstallPath();
+-  StringRef Version = GCCInstallation.getVersion().Text;
+   StringRef TripleStr = GCCInstallation.getTriple().str();
++  const GCCVersion &Version = GCCInstallation.getVersion();
+ 
+   if (addLibStdCXXIncludePaths(LibDir.str() + "/../include", 
+-                               "/c++/" + Version.str(),
++                               "/c++/" + Version.Text,
+                                TripleStr,
+                                GCCInstallation.getMultiarchSuffix(),
+                                DriverArgs, CC1Args))
+@@ -2602,10 +2604,12 @@ void Linux::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs,
+ 
+   const std::string IncludePathCandidates[] = {
+     // Gentoo is weird and places its headers inside the GCC install, so if the
+-    // first attempt to find the headers fails, try this pattern.
+-    InstallDir.str() + "/include/g++-v4",
++    // first attempt to find the headers fails, try these patterns.
++    InstallDir.str() + "/include/g++-v" + Version.MajorStr + "." +
++        Version.MinorStr,
++    InstallDir.str() + "/include/g++-v" + Version.MajorStr,
+     // Android standalone toolchain has C++ headers in yet another place.
+-    LibDir.str() + "/../" + TripleStr.str() + "/include/c++/" + Version.str(),
++    LibDir.str() + "/../" + TripleStr.str() + "/include/c++/" + Version.Text,
+     // Freescale SDK C++ headers are directly in <sysroot>/usr/include/c++,
+     // without a subdirectory corresponding to the gcc version.
+     LibDir.str() + "/../include/c++",
+diff --git a/tools/clang/lib/Driver/ToolChains.h b/tools/clang/lib/Driver/ToolChains.h
+index 3afd8dd..04cf467 100644
+--- a/tools/clang/lib/Driver/ToolChains.h
++++ b/tools/clang/lib/Driver/ToolChains.h
+@@ -48,6 +48,9 @@ protected:
+     /// \brief The parsed major, minor, and patch numbers.
+     int Major, Minor, Patch;
+ 
++    /// \brief The text of the parsed major, and major+minor versions.
++    std::string MajorStr, MinorStr;
++
+     /// \brief Any textual suffix on the patch number.
+     std::string PatchSuffix;
+ 
+-- 
+1.8.3.2
+