REV=`$(LLVM_DIR)/bin/llvm-config --version` && sed -e "s,expected_llvm_version=.*,expected_llvm_version=\"$$REV\"," < configure.ac > tmp && mv tmp configure.ac && echo "Version set to $$REV."
REV=`$(LLVM_DIR)/bin/llvm-config --version` && sed -e "s,expected_llvm_version=.*,expected_llvm_version=\"$$REV\"," < configure.ac > tmp && mv tmp configure.ac && echo "Version set to $$REV."