ccache issues during buildworld on recent -CURRENT

Hi,

my buildworlds using ccache have recently begun failing with the message below. Buildworld without ccache works fine. Any ideas?

CC='/usr/local/libexec/ccache/world/clang --sysroot=/home/elars/obj/usr/home/elars/src/tmp -B/home/elars/obj/usr/home/elars/src/tmp/usr/bin' mkdep -f .depend -a    -I/usr/home/elars/src/lib/clang/libclangbasic/../../../contrib/llvm/include -I/usr/home/elars/src/lib/clang/libclangbasic/../../../contrib/llvm/tools/clang/include -I/usr/home/elars/src/lib/clang/libclangbasic/../../../contrib/llvm/tools/clang/lib/Basic -I. -I/usr/home/elars/src/lib/clang/libclangbasic/../../../contrib/llvm/../../lib/clang/include -DLLVM_ON_UNIX -DLLVM_ON_FREEBSD -D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS -DCLANG_ENABLE_ARCMT -DCLANG_ENABLE_REWRITER -DCLANG_ENABLE_STATIC_ANALYZER -DLLVM_DEFAULT_TARGET_TRIPLE=\"x86_64-unknown-freebsd10.0\" -DLLVM_HOSTTRIPLE=\"x86_64-unknown-freebsd10.0\" -DDEFAULT_SYSROOT=\"\"        /usr/home/elars/src/lib/clang/libclangbasic/../../../contrib/llvm/tools/clang/lib/Basic/Builtins.cpp /usr/home/elars/src/lib/clang/libclangbasic/../../../contrib/llvm/tools/clang/lib/Basic/CharInfo.cpp /usr/home/elars/src/lib/clang/libclangbasic/../../../contrib/llvm/tools/clang/lib/Basic/Diagnostic.cpp /usr/home/elars/src/lib/clang/libclangbasic/../../../contrib/llvm/tools/clang/lib/Basic/DiagnosticIDs.cpp /usr/home/elars/src/lib/clang/libclangbasic/../../../contrib/llvm/tools/clang/lib/Basic/FileManager.cpp /usr/home/elars/src/lib/clang/libclangbasic/../../../contrib/llvm/tools/clang/lib/Basic/FileSystemStatCache.cpp /usr/home/elars/src/lib/clang/libclangbasic/../../../contrib/llvm/tools/clang/lib/Basic/IdentifierTable.cpp /usr/home/elars/src/lib/clang/libclangbasic/../../../contrib/llvm/tools/clang/lib/Basic/LangOptions.cpp /usr/home/elars/src/lib/clang/libclangbasic/../../../contrib/llvm/tools/clang/lib/Basic/Module.cpp /usr/home/elars/src/lib/clang/libclangbasic/../../../contrib/llvm/tools/clang/lib/Basic/ObjCRuntime.cpp /usr/home/elars/src/lib/clang/libclangbasic/../../../contrib/llvm/tools/clang/lib/Basic/OpenMPKinds.cpp /usr/home/elars/src/lib/clang/libclangbasic/../../../contrib/llvm/tools/clang/lib/Basic/OperatorPrecedence.cpp /usr/home/elars/src/lib/clang/libclangbasic/../../../contrib/llvm/tools/clang/lib/Basic/SourceLocation.cpp /usr/home/elars/src/lib/clang/libclangbasic/../../../contrib/llvm/tools/clang/lib/Basic/SourceManager.cpp /usr/home/elars/src/lib/clang/libclangbasic/../../../contrib/llvm/tools/clang/lib/Basic/TargetInfo.cpp /usr/home/elars/src/lib/clang/libclangbasic/../../../contrib/llvm/tools/clang/lib/Basic/Targets.cpp /usr/home/elars/src/lib/clang/libclangbasic/../../../contrib/llvm/tools/clang/lib/Basic/TokenKinds.cpp /usr/home/elars/src/lib/clang/libclangbasic/../../../contrib/llvm/tools/clang/lib/Basic/Version.cpp /usr/home/elars/src/lib/clang/libclangbasic/../../../contrib/llvm/tools/clang/lib/Basic/VersionTuple.cpp 
/usr/home/elars/src/lib/clang/libclangbasic/../../../contrib/llvm/tools/clang/lib/Basic/SourceManager.cpp:1100:10: fatal error: 'emmintrin.h' file not found
#include <emmintrin.h>
         ^
1 error generated.
mkdep: compile failed

Thanks,
Lars