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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 | # -*- Makefile -*-
#----------------------------------------------------------------------------
# $Id: rules.nested.GNU 80826 2008-03-04 14:51:23Z wotte $
#
# Nested directory targets makefile definitions
#----------------------------------------------------------------------------
# If the client makefile is not called "Makefile", the MAKEFILE
# variable must be set to its actual name before including this
# file to allow the recursive MAKE to work properly.
MAKEFILE ?= GNUmakefile
SUBDIR_MAKEFILE ?= $(MAKEFILE)
# Make sure that we build directories with DIRS= in sequence instead of in
# parallel, unless DIRS_PARALLEL is set, in which case they may be built
# in parallel if enabled by the proper flags and not disabled elsewhere.
DIRS_PARALLEL ?=
ifeq ($(DIRS_PARALLEL),)
.NOTPARALLEL:
endif
# A rule to build DIR.subdir from DIR by calling MAKE again, with
# DIR as the new directory, SUBDIR_TARGET as the target to build, and
# "GNUmakefile" as the makefile to use in the new directory.
# Triggered by the $(TARGETS_NESTED) target, below.
%.subdir: %
cd $< && $(MAKE) -f $(SUBDIR_MAKEFILE) $(SUBDIR_TARGET)
# Build FOO.nested by calling MAKE again, this time with DIRS (with
# ".subdir" appended to each) as the targets, and passing FOO as the
# real target to build in the SUBDIR_TARGET variable.
$(TARGETS_NESTED):
ifdef DIRS
ifneq ($(DIRS),)
$(MAKE) -f $(MAKEFILE) SUBDIR_TARGET=$(@:.nested=) $(addsuffix .subdir, $(DIRS))
endif # DIRS
endif # DIRS
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