Add support for the new PARALLEL_DIRS option
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3807 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/Makefile.common b/Makefile.common
index 7021906..5beeaa7 100644
--- a/Makefile.common
+++ b/Makefile.common
@@ -13,10 +13,15 @@
# example, ../.. for two levels deep.
#
# 2. DIRS - A list of subdirectories to be built. Fake targets are set up
-# so that each of the targets "all", "install", and "clean" each build.
-# the subdirectories before the local target.
+# so that each of the targets "all", "install", and "clean" each build
+# the subdirectories before the local target. DIRS are guaranteed to be
+# built in order.
#
-# 3. Source - If specified, this sets the source code filenames. If this
+# 3. PARALLEL_DIRS - A list of subdirectories to be built, but that may be
+# built in any order. All DIRS are built in order before PARALLEL_DIRS are
+# built, which are then built in any order.
+#
+# 4. Source - If specified, this sets the source code filenames. If this
# is not set, it defaults to be all of the .cpp, .c, .y, and .l files
# in the current directory. Also, if you want to build files in addition
# to the local files, you can use the ExtraSource variable
@@ -174,15 +179,23 @@
#---------------------------------------------------------
-# Handle the DIRS option
+# Handle the DIRS and PARALLEL_DIRS options
#---------------------------------------------------------
-ifdef DIRS # Only do this if we're using DIRS!
-
-all install clean::
+all install clean ::
$(VERB) for dir in ${DIRS}; do \
(cd $$dir; $(MAKE) $@) || exit 1; \
done
+
+# Handle PARALLEL_DIRS
+ifdef PARALLEL_DIRS
+all :: $(addsuffix /.makeall , $(PARALLEL_DIRS))
+install :: $(addsuffix /.makeinstall, $(PARALLEL_DIRS))
+clean :: $(addsuffix /.makeclean , $(PARALLEL_DIRS))
+
+%/.makeall %/.makeinstall %/.makeclean:
+ $(VERB) cd $(@D); $(MAKE) $(subst $(@D)/.make,,$@)
+
endif
#---------------------------------------------------------