#-----------------------------------------------------------------------------#
# Copyright (C) 1995-1999 The University of Melbourne.
# This file may only be copied under the terms of the GNU General
# Public License - see the file COPYING in the Mercury distribution.
#-----------------------------------------------------------------------------#

# Mmake.rules - rules for building Mercury programs

# N.B. All the builtin rules must use $@ as the target, so that they work
# when $(VPATH) is set.

main_target: $(MAIN_TARGET)

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

# Beware that the order of suffixes is significant.
.SUFFIXES: .m .nl .no .err \
		.int0 .int .int2 .int3 .opt .trans_opt \
		.dep .depend .dv .doit .ugly \
		.date0 .date .date3 .optdate .trans_opt_date \
		.c .nu .o .pic_o \
		.i .s .pic_s \
		.ql .pl \
		.rlo

#-----------------------------------------------------------------------------#
#
# Code to set variables based on the setting of MMAKE_USE_SUBDIRS
# (i.e. --use-subdirs).
#

ifeq ($(MMAKE_USE_SUBDIRS),yes)

MCFLAGS += --use-subdirs
MSCFLAGS += --use-subdirs
MNCFLAGS += --use-subdirs
ALL_MGNUCFLAGS += -I.

endif

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

.PRECIOUS: $(date0s_subdir)%.date0
.PRECIOUS: $(dates_subdir)%.date
.PRECIOUS: $(date3s_subdir)%.date3
.PRECIOUS: $(optdates_subdir)%.optdate
.PRECIOUS: $(trans_opt_dates_subdir)%.trans_opt_date

#-----------------------------------------------------------------------------#
#
# Rules for NU-Prolog and SICStus Prolog.
#

.m.pl:
	sicstus_conv $<

.nl.pl:
	sicstus_conv $<

$(nos_subdir)%.no : %.m
	$(MNC) $(ALL_MNCFLAGS) -o $@ $<

$(nos_subdir)%.no : %.nl
	$(MNC) $(ALL_MNCFLAGS) -o $@ $<

$(qls_subdir)%.ql : %.m
	$(MSC) $(ALL_MSCFLAGS) -o $@ $<

$(qls_subdir)%.ql : %.nl
	$(MSC) $(ALL_MSCFLAGS) -o $@ $<

#-----------------------------------------------------------------------------#
#
# Rules for building dependency files
#

# When creating the dependencies with `--use-subdirs' enabled,
# we need to create the `Mercury/dates' directories manually
# in order to get things started.  This should not be necessary,
# but there is a bug in GNU Make with regard to directory caching.
# I have sent off a bug report to the GNU Make maintainers (19 March 1998).
#	-fjh.

# beware the code for `%.depend' and `%.dep'/`%.dv' is duplicated
$(deps_subdir)%.dep $(deps_subdir)%.dv:
	$(MCD) $(ALL_MCDFLAGS) $*
ifeq ($(MMAKE_USE_SUBDIRS),yes)
	# the following mkdirs work around a bug in GNU Make
	-[ -d Mercury/dates ] || mkdir Mercury/dates
	-[ -d Mercury/date0s ] || mkdir Mercury/date0s
	-[ -d Mercury/date3s ] || mkdir Mercury/date3s
	-[ -d Mercury/optdates ] || mkdir Mercury/optdates
endif

# beware the code for `%.depend' and `%.dep'/`%.dv' is duplicated
.PHONY: %.depend
%.depend :
	$(MCD) $(ALL_MCDFLAGS) $*
ifeq ($(MMAKE_USE_SUBDIRS),yes)
	# the following mkdirs work around a bug in GNU Make
	-[ -d Mercury/dates ] || mkdir Mercury/dates
	-[ -d Mercury/date0s ] || mkdir Mercury/date0s
	-[ -d Mercury/date3s ] || mkdir Mercury/date3s
	-[ -d Mercury/optdates ] || mkdir Mercury/optdates
endif

# The `.doit' files are helpful when using Prolog.

%.doit : $(deps_subdir)%.dep $(deps_subdir)%.dv
	sed -e ':a' -e '/\\/N' -e 's/\\\n	//' -e 't a' $< |  \
	grep '\.ms *=' | \
	sed	-e 's/.*=/:-[ '\''nu_library.doit'\'', /' \
		-e 's/\.m/,/g' \
		-e 's/$$/ portray ]./' \
		> $@

#-----------------------------------------------------------------------------#
#
# Rules for building interface files
# WARNING: any changes here will probably need to be
# duplicated in compiler/modules.m.
#

$(date0s_subdir)%.date0 : %.m
	$(MCPI) $(ALL_MCPIFLAGS) $<

$(dates_subdir)%.date : %.m
	$(MCI) $(ALL_MCIFLAGS) $<

$(date3s_subdir)%.date3 : %.m
	$(MCSI) $(ALL_MCSIFLAGS) $<

$(optdates_subdir)%.optdate : %.m
	$(MCOI) $(ALL_MCOIFLAGS) $<

$(trans_opt_dates_subdir)%.trans_opt_date : %.m
	$(MCTOI) $(ALL_MCTOIFLAGS) $<

# Be very careful about changing the following rules.
# The `@:' is a silent do-nothing command.
# It is used to force GNU Make to recheck the timestamp
# on the target file.  (It is a pity that GNU Make doesn't
# have a way of handling these sorts of rules in a nicer manner.)

$(int0s_subdir)%.int0 : $(date0s_subdir)%.date0
	@:

$(ints_subdir)%.int : $(dates_subdir)%.date
	@:

$(int2s_subdir)%.int2 : $(dates_subdir)%.date
	@:

$(int3s_subdir)%.int3 : $(date3s_subdir)%.date3
	@:

$(opts_subdir)%.opt : $(optdates_subdir)%.optdate
	@:

$(trans_opts_subdir)%.trans_opt : $(trans_opt_dates_subdir)%.trans_opt_date
	@:

#-----------------------------------------------------------------------------#
#
# Rules for compiling Mercury source files
# WARNING: any changes here will probably need to be
# duplicated in compiler/modules.m.
#

$(cs_subdir)%.c : %.m
	rm -f $(cs_subdir)$*.c
	$(MCG) $(ALL_GRADEFLAGS) $(ALL_MCGFLAGS) $< > $*.err 2>&1

$(rlos_subdir)%.rlo : %.m
	rm -f $(rlos_subdir)$*.c
	$(MCG) $(ALL_GRADEFLAGS) $(ALL_MCGFLAGS) --aditi-only $< > $*.err 2>&1

# If we are removing the .c files, we need to tell Make that we're
# generating the .o files directly from the .m files, but
# in order to avoid remaking the .c files if they're already there,
# we need to invoke mmake recursively for each .c file.
# This can be pretty inefficient.

ifneq ($(RM_C),:)

$(os_subdir)%.o : %.m
	$(MMAKE_MAKE_CMD) $(MFLAGS) MC="$(MC)" ALL_MCFLAGS="$(ALL_MCFLAGS)" \
		ALL_GRADEFLAGS="$(ALL_GRADEFLAGS)" $(cs_subdir)$*.c
	$(MGNUC) $(ALL_GRADEFLAGS) $(ALL_MGNUCFLAGS) -c $(cs_subdir)$*.c -o $@
	$(RM_C) $(cs_subdir)$*.c

$(os_subdir)%.pic_o : %.m
	$(MMAKE_MAKE_CMD) $(MFLAGS) MC="$(MC)" ALL_MCFLAGS="$(ALL_MCFLAGS)" \
		ALL_GRADEFLAGS="$(ALL_GRADEFLAGS)" $(cs_subdir)$*.c
	$(MGNUC) $(ALL_GRADEFLAGS) $(ALL_MGNUCFLAGS) $(CFLAGS_FOR_PIC) \
		-c $(cs_subdir)$*.c -o $@

endif # RM_C != :

# For --split-c-files, we generate the .o files directly from the .m files.
# (One reason for this is that there's no easy of telling Make how many
# `.o' files it should make, since the number of them depends on what's
# in the source files.)

$(dirs_subdir)%.dir/*.o: %.m
	rm -f $@
	$(MCS) $(ALL_GRADEFLAGS) $(ALL_MCSFLAGS) $<

# The `touch' is necessary, since otherwise if
# the old .err file was of size zero and
# the new .err file is also of size zero,
# the time-stamp doesn't get updated!
# (Is that a bug in unix? In bash?)

.m.err:
	$(MC) $(ALL_MCFLAGS) --errorcheck-only $< > $@ 2>&1
	@touch $@

.m.ugly:
	$(MC) --convert-to-mercury $(ALL_MCFLAGS) $<

#-----------------------------------------------------------------------------#
#
# Rules for compiling C files in the user's source directory.
#

.c.o:
	$(MGNUC) $(ALL_GRADEFLAGS) $(ALL_MGNUCFLAGS) -c $< -o $@

.c.pic_o:
	$(MGNUC) $(ALL_GRADEFLAGS) $(ALL_MGNUCFLAGS) $(CFLAGS_FOR_PIC) \
		-c $< -o $@

.c.s:
	$(MGNUC) $(ALL_GRADEFLAGS) $(ALL_MGNUCFLAGS) -S $< -o $@

.c.pic_s:
	$(MGNUC) $(ALL_GRADEFLAGS) $(ALL_MGNUCFLAGS) $(CFLAGS_FOR_PIC) \
		-S $< -o $@

.c.i:
	$(MGNUC) $(ALL_GRADEFLAGS) $(ALL_MGNUCFLAGS) -E $< > $@

#-----------------------------------------------------------------------------#
#
# Rules for compiling C files in a subdirectory.
# Note that we need both these rules and the ones above,
# since even if the compiler generates all of its files in subdirectories,
# the user may have some C files of their own which need to be compiled.
#

ifneq ("$(cs_subdir)","")

$(os_subdir)%.o : $(cs_subdir)%.c
	$(MGNUC) $(ALL_GRADEFLAGS) $(ALL_MGNUCFLAGS) -c $< -o $@

$(os_subdir)%.pic_o : $(cs_subdir)%.c
	$(MGNUC) $(ALL_GRADEFLAGS) $(ALL_MGNUCFLAGS) $(CFLAGS_FOR_PIC) \
		-c $< -o $@

%.s: $(cs_subdir)%.c
	$(MGNUC) $(ALL_GRADEFLAGS) $(ALL_MGNUCFLAGS) -S $< -o $@

%.pic_s: $(cs_subdir)%.c
	$(MGNUC) $(ALL_GRADEFLAGS) $(ALL_MGNUCFLAGS) $(CFLAGS_FOR_PIC) \
		-S $< -o $@

%.i: $(cs_subdir)%.c
	$(MGNUC) $(ALL_GRADEFLAGS) $(ALL_MGNUCFLAGS) -E $< > $@

endif # $(cs_subdir) != ""

#-----------------------------------------------------------------------------#
#
# Code to handle dependencies on $(MLOBJS) and $(MLPICOBJS).
#

# The generated `.dep' files include rules for targets which may depend
# on $(MLOBJS) or $(MLPICOBJS).  However, the definition of $(MLOBJS)
# or $(MLPICOBJS) is in the user's Mmakefile, and the `.dep' files get
# included *before* the Mmakefile.  The `.dep' files cannot contain
# those dependency directly, because $(MLOBJS) and $(MLPICOBJS) variables
# have not yet been defined.
#
# Instead, the generated `.dep' files just add the appropriate targets to
# the $(MLOBJS_DEPS) or $(MLPICOBJS_DEPS) variables, and then we record the
# dependency of those files on $(MLOBJS) or $(MLPICOBJS) here in Mmake.rules,
# which gets included after the user's Mmakefile.

$(MLOBJS_DEPS) : $(MLOBJS)
$(MLPICOBJS_DEPS) : $(MLPICOBJS)

#-----------------------------------------------------------------------------#
#
# Targets for cleaning up.
#
# Note that the actions for most of these targets are in the
# automatically generated `.d' files.
#

.PHONY: clean realclean clean_nu clean_sicstus clean_prof_files

clean_prof_files:
	-rm -f Prof.CallPair Prof.Counts Prof.Decl Prof.MemWords Prof.MemCells

#
# The `clean' and `realclean' targets are implemented via `clean_local'
# and `realclean_local'.  This allows a user to add rules in their
# Mmakefile to do a recursive mmake clean, for example, while still being
# able to use the local versions in their original form.
#

.PHONY: clean_local realclean_local

realclean: realclean_local

clean: clean_local

realclean_local: clean_local

clean_local: clean_prof_files

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