.Makefile.BSD

# The top-level Makefile includes this Makefile and must define the variable
# DIRS to point to at least one directory.

all:
.for dir in ${DIRS}
	${MAKE} -C ${dir}
.endfor

# Accumulate all targets from existing build directories. This will ensure that
# a top-level `make T' succeeds as long as *at least one* of the build
# directories provide a target T.
.for dir in ${DIRS}
targets!=grep '^[^\$$. ]\+:.*' ${dir}/Makefile | sed 's/:.*$$//' | tr '\n' ' '
TARGETS+="${targets}"
.endfor
TARGETS!=echo ${TARGETS} | tr ' ' '\n' | sort | uniq | tr '\n' ' '

# Define one target for all found targets and execute it in *all* known build
# directories.
.for t in ${TARGETS}
.if !target(${t})
${t}:
.for dir in ${DIRS}
	${MAKE} -C ${dir} ${t}
.endfor
.endif
.endfor

# Clear all build state and bring repository back to state after clone.
distclean:
	rm -rf ${DIRS} Makefile

.PHONY: all distclean ${TARGETS}