+# Build polly before the tools: the tools link against polly when
+# LINK_POLLY_INTO_TOOLS is set.
+if(WITH_POLLY)
+ add_llvm_external_project(polly)
+else(WITH_POLLY)
+ list(APPEND LLVM_IMPLICIT_PROJECT_IGNORE "${LLVM_MAIN_SRC_DIR}/tools/polly")
+endif(WITH_POLLY)
+