From: Mike Stump <mrs@apple.com>
Date: Sat, 24 Jan 2009 00:00:41 +0000 (+0000)
Subject: Perform optional clang building.
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=0a26891ce9b6de840c087d73c04324729c3d1a8b;p=oota-llvm.git

Perform optional clang building.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62895 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/Makefile.rules b/Makefile.rules
index 0d4a0c8aedf..5bddff8e8a2 100644
--- a/Makefile.rules
+++ b/Makefile.rules
@@ -612,6 +612,13 @@ $(RecursiveTargets)::
 	done
 endif
 
+#-----------------------------------------------------------
+# Handle the OPTIONAL_PARALLEL_DIRS options for optional parallel construction
+#-----------------------------------------------------------
+ifdef OPTIONAL_PARALLEL_DIRS
+  PARALLEL_DIRS += $(foreach T,$(OPTIONAL_PARALLEL_DIRS),$(shell test -d $(PROJ_SRC_DIR)/$(T) && echo "$(T)"))
+endif
+
 #-----------------------------------------------------------
 # Handle the PARALLEL_DIRS options for parallel construction
 #-----------------------------------------------------------
diff --git a/tools/Makefile b/tools/Makefile
index 2726c1f3e43..519717ad98d 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -8,6 +8,10 @@
 ##===----------------------------------------------------------------------===##
 
 LEVEL := ..
+
+# Build clang if present.
+OPTIONAL_PARALLEL_DIRS := clang
+
 # NOTE: The tools are organized into five groups of four consisting of one
 # large and three small executables. This is done to minimize memory load
 # in parallel builds.  Please retain this ordering.