1 files changed, 6 insertions, 0 deletions
diff --git a/Makefile b/Makefile
index f3bf3f2..ce79465 100644
--- a/Makefile
+++ b/Makefile
@@ -19,6 +19,7 @@ LEVEL := .
 #
 # When cross-compiling, there are some things (tablegen) that need to
 # be build for the build system first.
+ifndef RC_ARCHS  # Normal build (not "Apple-style").
 ifeq ($(BUILD_DIRS_ONLY),1)
   DIRS := lib/System lib/Support utils
   OPTIONAL_DIRS :=
@@ -211,3 +212,8 @@ happiness: update all check unittests
 
 .NOTPARALLEL:
 
+else # Building "Apple-style."
+# N.B. In an Apple-style build, once configuration is done, lines
+# marked "Apple-style" are removed with sed!  See utils/buildit/build_llvm.
+include utils/buildit/GNUmakefile # Building "Apple-style."
+endif # Building "Apple-style."