#-----------------------------------------------------------------------------#

#
# Note: Mmake lets you override MCFLAGS for a particular file by setting
# MCFLAGS-foo.  Similarly, you can override GRADEFLAGS for a particular
# file by setting both GRADEFLAGS-foo.
#

DIFF_OPTS=-c

#-----------------------------------------------------------------------------#

#
# If there is a `.inp' file, then we pipe that in as the command's input.
# If there is a `.arg' file, then we use it as the command's argument
# string.
# Then we run the command, with stdout and stderr both redirected to the 
# `.out' file.  Finally if the command fails (returns non-zero exit status),
# we print out the contents of the `.out' file.  We use `grep . $@ /dev/null'
# to print out the contents, because that precedes each line of output with
# the filename, which is helpful when running a parallel make.
#
%.out: %
	{ [ -f $*.inp ] && cat $*.inp; } | \
		./$< `{ [ -f $*.arg ] && cat $*.arg; }` > $@ 2>&1 || \
		{ grep . $@ /dev/null; exit 1; }

#
# For some test cases, there is more than one valid output.
# We try matching the output with the `.exp' file, and if that
# doesn't succeed, and there is a `.exp2' file, then we try matching
# against that too.  If neither succeed, the shorter of the two diffs
# is put into the `.res' file.
#
%.res: %.exp %.out
	-rm -f $@
	-rm -f $*.res2
	diff $(DIFF_OPTS) $*.exp $*.out > $@ || \
		{ test -f $*.exp2 && \
			if diff $(DIFF_OPTS) $*.exp2 $*.out > $*.res2; then \
				cp $*.res2 $@; \
			else \
				{ test `wc -l < $@` -le `wc -l < $*.res2` || \
					cp $*.res2 $@; } && false; \
			fi; \
		}

#-----------------------------------------------------------------------------#

clean_local: clean_out clean_res

clean_mc: clean_c clean_o clean_out clean_res

clean_out:
	rm -f *.out

clean_exp:
	rm -f *.exp

clean_res:
	rm -f *.res
	rm -f *.res2

#-----------------------------------------------------------------------------#

#
# The `foo' targets make `foo_local' in the current directory before
# recursively making `foo' in all subdirectories.  The recursive part
# is handled in individual Mmakefiles.
# 

.PHONY: check_local dep_local depend_local all_local

.PHONY: check_subdirs dep_subdirs depend_subdirs realclean_subdirs \
        clean_subdirs all_subdirs

check:          check_local check_subdirs
dep:            dep_local dep_subdirs
depend:         depend_local depend_subdirs
realclean:      realclean_subdirs
clean:          clean_subdirs
all:            all_local all_subdirs

SUBDIR_MMAKE = mmake \
                GRADE='$(GRADE)' \
                EXTRA_CFLAGS='$(EXTRA_CFLAGS)' \
                EXTRA_MCFLAGS='$(EXTRA_MCFLAGS)'

#-----------------------------------------------------------------------------#