tree 4b3ee8d89322d22de702171f8bf5584e459f5484
parent 3a9710f940124eb5e6cdd32ab145de59a5b53d02
author Daniel Mentz <danielmentz@google.com> 1381873830 -0700
committer Daniel Mentz <danielmentz@google.com> 1415917477 -0800

Fix parallel build for cmm

This is the wildcard recipe for the "all" target:

%/all:
	$(MAKE) -C $* all

The following recipe for "cmm/all" had priority over the more general
recipe for the "%/all" target.

cmm/all: fci/lib/install
	@

The resulting recipe for "cmm/all" was basically a noop.  Nothing got
built.

After the "all" target has been remade, Make would execute the "install"
recipe which basically runs the following two commands in parallel.

make -C cmm DESTDIR=staging/ install
make -C cmm DESTDIR=target/ install

The Makefile in the "cmm" subdirectory defines the "all" target as a
prerequisite of the "install" target and therefore builds the same
before running the "install" recipe. As a result, two instances of make
are trying to re-make the "all" target at the same time which wreaks
havoc.

To fix this problem, change the definition of "cmm/all" from a recipe to
a definition of a dependency. Make will now run a single instance of
"$(MAKE) -C $* all" before running two instances for the "install"
targets concurrently.

Change-Id: I20561c6bd0fbeeeaaf30bbffb6497bfdc9b4f31f