lang/beignet: cannot build with llvm50 on 10.3

FAILED: src/kernels/cl_internal_copy_buf_align16_str.c
cd /wrkdirs/usr/ports/lang/beignet/work/Beignet-1.3.2-Source/src && rm -rf /wrkdirs/usr/ports/lang/beignet/work/Beignet-1.3.2-Source/src/kernels//cl_internal_copy_buf_align16_str.c && env OCL_BITCODE_LIB_PATH=/wrkdirs/usr/ports/lang/beignet/work/Beignet-1.3.2-Source/backend/src/libocl//usr/local/lib/beignet//beignet.bc OCL_HEADER_FILE_DIR=/wrkdirs/usr/ports/lang/beignet/work/Beignet-1.3.2-Source/backend/src/libocl//usr/local/lib/beignet//include/ OCL_PCH_PATH=/wrkdirs/usr/ports/lang/beignet/work/Beignet-1.3.2-Source/backend/src/libocl//usr/local/lib/beignet//beignet.local.pch OCL_BITCODE_LIB_20_PATH=/wrkdirs/usr/ports/lang/beignet/work/Beignet-1.3.2-Source/backend/src/libocl//usr/local/lib/beignet//beignet_20.bc OCL_PCH_20_PATH=/wrkdirs/usr/ports/lang/beignet/work/Beignet-1.3.2-Source/backend/src/libocl//usr/local/lib/beignet//beignet_20.local.pch LD_LIBRARY_PATH=/wrkdirs/usr/ports/lang/beignet/work/Beignet-1.3.2-Source/backend/src /wrkdirs/usr/ports/lang/beignet/work/Beignet-1.3.2-Source/backend/src/gbe_bin_generater -s -o/wrkdirs/usr/ports/lang/beignet/work/Beignet-1.3.2-Source/src/kernels//cl_internal_copy_buf_align16_str.c /wrkdirs/usr/ports/lang/beignet/work/Beignet-1.3.2-Source/src/kernels//cl_internal_copy_buf_align16.cl
ninja: build stopped: subcommand failed.

  Program received signal SIGBUS, Bus error.
  std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::compare (
      this=0x80959ac20, __str=...) at /usr/include/c++/v1/string:3643
  3643        size_t __rhs_sz = __str.size();
  (gdb) backtrace
  #0  std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::compare (
      this=0x80959ac20, __str=...) at /usr/include/c++/v1/string:3643
  #1  std::__1::operator< <char, std::__1::char_traits<char>, std::__1::allocator<char> > (__lhs=..., __rhs=...)
      at /usr/include/c++/v1/string:3827
  #2  std::__1::__tree<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, std::__1::less<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >, std::__1::allocator<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > > >::value_comp (
      this=0x7fffffff9af8, this=0x7fffffff9af8, __x=..., __y=...) at /usr/include/c++/v1/__functional_base:63
  #3  std::__1::__tree<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, std::__1::less<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >, std::__1::allocator<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > > >::__find_equal<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > > (this=0x7fffffff9ae8,
      __parent=@0x7fffffff94b8: 0x80063e400, __v=...) at /usr/include/c++/v1/__tree:1613
  #4  0x0000000800f6c3c2 in std::__1::__tree<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, std::__1::less<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >, std::__1::allocator<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > > ---Type <return> to continue, or q <return> to quit---
  >::__insert_unique (this=0x7fffffff9ae8, __v=...) at /usr/include/c++/v1/__tree:1867
  #5  0x000000080147e8eb in clang::ASTReader::ReadASTBlock(clang::serialization::ModuleFile&, unsigned int) ()
     from /wrkdirs/usr/ports/lang/beignet/work/Beignet-1.3.2-Source/backend/src/libgbe.so
  #6  0x0000000801484484 in clang::ASTReader::ReadAST(llvm::StringRef, clang::serialization::ModuleKind, clang::SourceLocation, unsigned int, llvm::SmallVectorImpl<clang::ASTReader::ImportedSubmodule>*) ()
     from /wrkdirs/usr/ports/lang/beignet/work/Beignet-1.3.2-Source/backend/src/libgbe.so
  #7  0x000000080138be1b in clang::CompilerInstance::createPCHExternalASTSource(llvm::StringRef, llvm::StringRef, bool, bool, clang::Preprocessor&, clang::ASTContext&, clang::PCHContainerReader const&, llvm::ArrayRef<std::__1::shared_ptr<clang::ModuleFileExtension> >, clang::DependencyFileGenerator*, llvm::ArrayRef<std::__1::shared_ptr<clang::DependencyCollector> >, void*, bool, bool, bool) ()
     from /wrkdirs/usr/ports/lang/beignet/work/Beignet-1.3.2-Source/backend/src/libgbe.so
  #8  0x000000080138bb7c in clang::CompilerInstance::createPCHExternalASTSource(llvm::StringRef, bool, bool, void*, bool) () from /wrkdirs/usr/ports/lang/beignet/work/Beignet-1.3.2-Source/backend/src/libgbe.so
  #9  0x00000008013d0d47 in clang::FrontendAction::BeginSourceFile(clang::CompilerInstance&, clang::FrontendInputFile const&) () from /wrkdirs/usr/ports/lang/beignet/work/Beignet-1.3.2-Source/backend/src/libgbe.so
  #10 0x000000080138eec5 in clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) ()
  ---Type <return> to continue, or q <return> to quit---
     from /wrkdirs/usr/ports/lang/beignet/work/Beignet-1.3.2-Source/backend/src/libgbe.so
  #11 0x0000000800f19565 in gbe::buildModuleFromSource (
      source=0x8007b2000 "kernel void __cl_copy_region_align16 ( global float* src, unsigned int src_offset,\n", ' ' <repeats 38 times>, "global float* dst, unsigned int dst_offset,\n\t\t\t\t      unsigned int size)\n{\n    "..., out_module=0x7fffffffd360, llvm_ctx=0x809419468, dumpLLVMFileName=..., dumpSPIRBinaryName=..., options=...,
      stringSize=0, err=0x0, errSize=0x0, oclVersion=120) at backend/src/backend/program.cpp:735
  #12 0x0000000800f0688c in gbe::programCompileFromSource (deviceID=0,
      source=0x8007b2000 "kernel void __cl_copy_region_align16 ( global float* src, unsigned int src_offset,\n", ' ' <repeats 38 times>, "global float* dst, unsigned int dst_offset,\n\t\t\t\t      unsigned int size)\n{\n    "..., temp_header_path=0x0, stringSize=0, options=0x809417259 "", err=0x0, errSize=0x0)
      at backend/src/backend/program.cpp:1163
  #13 0x00000000004073f8 in program_build_instance::build_program (this=0x809417240)
      at backend/src/gbe_bin_generater.cpp:280
  #14 0x000000000040990f in main (argc=4, argv=0x7fffffffe740) at backend/src/gbe_bin_generater.cpp:429

lang/beignet/Makefile

@@ -64,4 +64,11 @@ do-test-TEST-on:
 
 pre-install-TEST-on: do-test-TEST-on
 
+.include <bsd.port.options.mk>
+
+# gbe_bin_generater crashes in libc++ when built by clang++60
+.if ${OPSYS} == FreeBSD && ${OSVERSION} < 1003513
+LLVMVER=	50
+.endif
+
 .include <bsd.port.mk>