Makefile.subdir

#
# included by each sub-dir/Makefile
# contains rules to forward 'make' to top-level Makefile
# note that paths in here are relative to the original sub-dir.
#

.SUFFIXES:

.PHONY: default

# includes top-level targets (all, ...) and directories (testing, ...),
# excluding 'clean' and some internal targets.
# alphabetic order
targets := \
	all                  \
	blas_fix             \
	cleanall             \
	cleandep             \
	cleangen             \
	cleanmake            \
	clmagmablas          \
	control              \
	dense                \
	echo                 \
	generate             \
	include              \
	install              \
	interface_cuda       \
	interface_opencl     \
	lib                  \
	magmablas            \
	shared               \
	sparsela             \
	sparse               \
	sparse/blas          \
	sparse/control       \
	sparse/src           \
	sparse/testing       \
	sparse-lib           \
	sparse-shared        \
	sparse-static        \
	sparse-test          \
	src                  \
	static               \
	test                 \
	test_headers         \
	testers_f            \
	testing              \
	testing/lin          \
	wrappers             \

ifneq ($(MAKECMDGOALS),)

# goals given on command line
# forward them in one batch to top level

# global targets in $(targets) are forwarded as-is
# all other, directory-specific goals (e.g., files) are forwarded with directory prefix
forward := $(filter $(targets), $(MAKECMDGOALS)) \
           $(addprefix $(cdir)/, $(filter-out $(targets), $(MAKECMDGOALS)))

# we want to run one top-level make command, not N different ones.
# we'll make the first goal forward all the goals,
# and disable the rest.
first := $(firstword $(MAKECMDGOALS))

rest  := $(wordlist 2, $(words $(MAKECMDGOALS)), $(MAKECMDGOALS))

$(first): force
	cd $(top) && $(MAKE) $(forward)

$(rest): ;

else

# no goals given on command line
# forward default rule to top level as-is
%:
	cd $(top) && $(MAKE) $@

endif

force: ;

# don't regenerate Makefiles
Makefile: ;

$(top)/Makefile.subdir: ;

# Disable parallel make for sub-directories, which causes problems,
# e.g., if two top-level makes try to update a library simultaneously.
# The first/rest mechanism above should also prevent parallel jobs.
.NOTPARALLEL: