# -----------------------------------------------------------------------------
# Makefile template starts here.

default: all

GHC_OPTS += -i$(odir)

# For adding options on the command-line
GHC_OPTS += $(EXTRA_HC_OPTS)

HS_OBJS = $(patsubst %,$(odir)/%.$(osuf),$(subst .,/,$(modules)))
HS_IFS  = $(patsubst %,$(odir)/%.$(hisuf),$(subst .,/,$(modules)))
C_OBJS  = $(patsubst %.c,$(odir)/%.$(osuf),$(C_SRCS))

ifeq "$(way:%dyn=YES)" "YES"
LIB = $(odir)/libHS$(package)$(_way:%_dyn=%)-ghc$(GHC_VERSION)$(soext)
else
LIB = $(odir)/libHS$(package)$(_way).a
endif

RM = rm -f

# Optionally include local customizations:
-include Makefile.local

# Rules follow:

MKSTUBOBJS = find $(odir) -name "*_stub.$(osuf)" -print
# HACK ^^^ we tried to use $(wildcard), but apparently it fails due to
# make using cached directory contents, or something.

# We have to jump through some hoops if we don't want the vanilla way,
# as it's handled specially
ifneq "$(way) $(VANILLA_WAY)" " NO"
all :: $(odir)/.depend $(LIB)
endif

$(odir)/.depend : $(MAKEFILE)
	$(GHC) -M $(GENERATE_DOT_DEPEND) $(foreach way,$(WAYS),-optdep-s -optdep$(way)) $(foreach obj,$(MKDEPENDHS_OBJ_SUFFICES),-osuf $(obj)) $(filter-out -split-objs, $(GHC_OPTS)) $(modules)
	for dir in $(sort $(foreach mod,$(HS_OBJS) $(C_OBJS),$(dir $(mod)))); do \
		if test ! -d $$dir; then mkdir -p $$dir; fi \
	done

include $(odir)/.depend

ifeq "$(way:%dyn=YES)" "YES"
$(LIB) : $(HS_OBJS) $(C_OBJS)
	@$(RM) $@
	$(GHC) -shared -dynamic -no-auto-link-packages -o $@ $(C_OBJS) $(HS_OBJS) `$(MKSTUBOBJS)` $(LIB_LD_OPTS)
else
ifneq "$(filter -split-objs, $(GHC_OPTS))" ""
$(LIB) : $(HS_OBJS) $(C_OBJS)
	@$(RM) $@
	(echo $(C_OBJS) `$(MKSTUBOBJS)`; find $(patsubst %.$(osuf),%_split,$(HS_OBJS)) -name '*.$(way_)o' -print) | xargs $(AR) q $(EXTRA_AR_ARGS) $@
else
$(LIB) : $(HS_OBJS) $(C_OBJS)
	@$(RM) $@
	echo $(C_OBJS) $(HS_OBJS) `$(MKSTUBOBJS)` | xargs $(AR) q $(EXTRA_AR_ARGS) $@
endif
endif

ifneq "$(GHCI_LIB)" ""
ifeq "$(way)" ""
all ::  $(GHCI_LIB)

$(GHCI_LIB) : $(HS_OBJS) $(C_OBJS)
	@$(RM) $@
	$(LD) -r -o $@ $(EXTRA_LD_OPTS) $(HS_OBJS) `$(MKSTUBOBJS)` $(C_OBJS)
endif
endif

# suffix rules

# The .hs files might be in $(odir) if they were preprocessed
$(odir_)%.$(osuf) : $(odir_)%.hs
	$(GHC) $(GHC_OPTS) -c $< -o $@  -ohi $(basename $@).$(hisuf)

$(odir_)%.$(osuf) : $(odir_)%.lhs
	$(GHC) $(GHC_OPTS) -c $< -o $@  -ohi $(basename $@).$(hisuf)

$(odir_)%.$(osuf) : %.c
	@$(RM) $@
	$(GHC) $(GHC_CC_OPTS) -c $< -o $@

$(odir_)%.$(way_)s : %.c
	@$(RM) $@
	$(GHC) $(GHC_CC_OPTS) -S $< -o $@

%.$(hisuf) : %.$(osuf)
	@if [ ! -f $@ ] ; then \
	    echo Panic! $< exists, but $@ does not.; \
	    exit 1; \
	else exit 0 ; \
	fi

%.$(way_)hi-boot : %.$(osuf)-boot
	@if [ ! -f $@ ] ; then \
	    echo Panic! $< exists, but $@ does not.; \
	    exit 1; \
	else exit 0 ; \
	fi

$(odir_)%.$(hisuf) : %.$(way_)hc
	@if [ ! -f $@ ] ; then \
	    echo Panic! $< exists, but $@ does not.; \
	    exit 1; \
	else exit 0 ; \
	fi

show:
	@echo '$(VALUE)="$($(VALUE))"'

clean ::
	$(RM) $(HS_OBJS) $(C_OBJS) $(LIB) $(GHCI_LIB) $(HS_IFS) .depend
	$(RM) -rf $(wildcard $(patsubst %.$(osuf), %_split, $(HS_OBJS)))
	$(RM) $(wildcard $(patsubst %.$(osuf), %.o-boot, $(HS_OBJS)))
	$(RM) $(wildcard $(patsubst %.$(osuf), %.hi-boot, $(HS_OBJS)))
	$(RM) $(wildcard $(patsubst %.$(osuf), %_stub.o, $(HS_OBJS)))

ifneq "$(strip $(WAYS))" ""
ifeq "$(way)" ""
all clean ::
# Don't rely on -e working, instead we check exit return codes from sub-makes.
	@case '${MFLAGS}' in *-[ik]*) x_on_err=0;; *-r*[ik]*) x_on_err=0;; *) x_on_err=1;; esac; \
	for i in $(WAYS) ; do \
	  echo "== $(MAKE) way=$$i -f $(MAKEFILE) $@;"; \
	  $(MAKE) way=$$i -f $(MAKEFILE) --no-print-directory $(MFLAGS) $@ ; \
	  if [ $$? -eq 0 ] ; then true; else exit $$x_on_err; fi; \
	done
	@echo "== Finished recursively making \`$@' for ways: $(WAYS) ..."
endif
endif