# -*-Mode: Makefile;-*-
#
# To rebuild PERL2ARB from $ARBHOME call
# make perl_clean perl

ARB_MAINMAKEFILE=../Makefile
THIS=Makefile.main

# howto call Makefile.main (this file)
MAKETHIS=$(MAKE) -f $(THIS)

# howto call generated Makefile
PMAKE=$(MAKE) "CC=$(A_CXX)"

LIB=$(ARBHOME)/lib
ARBDB=$(ARBHOME)/ARBDB

# code in -> ../PERLTOOLS/arb_proto_2_xsub.cxx
ARB_PROTO_2_XSUB=$(ARBHOME)/bin/arb_proto_2_xsub

HEADERS = \
	$(ARBDB)/ad_prot.h \
	$(ARBDB)/ad_t_prot.h \

ifeq ($(DARWIN),1)
SO:=bundle
LIBSO:=a
else
SO:=so
LIBSO:= so
endif

ARB_SO=blib/arch/auto/ARB/ARB.$(SO)

TARGET_PM=$(LIB)/ARB.pm
TARGET_SO=$(LIB)/ARB.$(SO)

TARGETS=$(TARGET_PM) $(TARGET_SO)

DOC=perl-interface-function-list.txt

XS_DEPENDS = Makefile Makefile.main ARB.xs debug.h Makefile.PL

# ../SOURCE_TOOLS/filter_defined_symbols.pl
SHOW_UNDEFINED=$(ARBHOME)/SOURCE_TOOLS/filter_defined_symbols.pl
WARN_UNDEFINED=./warn_undefined_symbols.pl

# ------------------------------------------------------------
# variables for Makefile

MYEXTLIB :=
PASTHRU_INC :=
PASTHRU_DEFINE :=

export MYEXTLIB PASTHRU_INC PASTHRU_DEFINE dflags
export CC CXX A_CC A_CXX

# ------------------------------------------------------------
# normal build calls this makefile with AUTODEPENDS==1

ifeq ($(AUTODEPENDS),1)
all:
	@echo "-------- recurse $(THIS) to build depends"
	+test -f .depends || $(MAKETHIS) "AUTODEPENDS=0" .depends
	@echo "-------- done recurse $(THIS)"
	@echo "-------- recurse $(THIS) to build all"
	+$(MAKETHIS) "AUTODEPENDS=2" all
	@echo "-------- done recurse $(THIS)"
else
all: realall
endif

realall: perlmain.c $(TARGETS) $(DOC)

perlmain.c: perlmain_source.c
	cp $< $@

$(TARGET_PM) : ARB.pm
	cp $< $@

$(TARGET_SO) : $(ARB_SO) $(SHOW_UNDEFINED) $(WARN_UNDEFINED)
	$(SHOW_UNDEFINED) $(ARB_SO) $(LIB)/libARBDB.$(LIBSO) $(LIB)/libCORE.$(LIBSO) | $(WARN_UNDEFINED)
	cp $< $@

# Note: the targets '$(ARB_SO)' and 'ARB.c' may not be called in parallel (causes failure)
# To avoid doing that by mistake, they fail if AUTODEPENDS has wrong (unexpected) value.

$(ARB_SO) : $(XS_DEPENDS) depends.stamp
ifeq ($(AUTODEPENDS),2)
	rm $(ARB_SO) || true
	@echo "Used perl version: `perl -v | grep 'This is perl'`"
	@echo "-------- calling MakeMaker-Makefile (to build module; AUTODEPENDS=$(AUTODEPENDS))"
	$(PMAKE) $@
	@echo "-------- end of MakeMaker-Makefile"
else
	$(error target '$@' not valid if AUTODEPENDS==$(AUTODEPENDS))
endif

ARB.c : $(XS_DEPENDS)
ifeq ($(AUTODEPENDS),0)
	@echo "-------- calling MakeMaker-Makefile (to generate C-source; AUTODEPENDS=$(AUTODEPENDS))"
	$(PMAKE) $@
	@echo "-------- end of MakeMaker-Makefile"
else
	$(error target '$@' not valid if AUTODEPENDS==$(AUTODEPENDS))
endif
# buildMakefile

# ------------------------------------------------------------
# hack to compile with gcc 4.7.x and perl 5.10.1
# (see http://bugs.arb-home.de/changeset/10566 for why)

PERL_GCC_INCOMPAT:= \
	v5.10.1___4.7.1 \
	v5.10.1___4.7.2 \
	v5.10.1___4.7.3 \
	v5.10.1___4.7.4 \

PERL_GCC:=$(shell perl -e 'print "$$^V\n";')___$(COMPILER_VERSION)
WONT_COMPILE_CXX11:=$(findstring $(PERL_GCC),$(PERL_GCC_INCOMPAT))

ifneq ('$(WONT_COMPILE_CXX11)','')
	hacked_cflags:=$(subst -std=gnu++11,,$(cflags4perl))
else
	hacked_cflags:=$(cflags4perl)
endif
ifeq ($(USE_CLANG),1)
	hacked_cflags:=$(hacked_cflags) -Wno-duplicate-decl-specifier
endif

# disable several warnings for perl interface build
# (would need changes in perl-core-api)

disabled_warnings:= \
	-Wno-zero-as-null-pointer-constant \
	-Wno-literal-suffix \
	-Wno-unused-parameter \

used_cflags:=$(subst -Weffc++,,$(hacked_cflags)) $(disabled_warnings) $(CXX_INCLUDES)
used_lflags:=$(lflags4perl)

MAKE_MAKEFILE=make_arbperl_makefile.pl

Makefile : $(MAKE_MAKEFILE) typemap Makefile.main $(ARB_MAINMAKEFILE) Makefile.PL
	( PATH=/usr/arb/bin:${PATH}; \
	  export PATH; \
	  echo calling perl $(MAKE_MAKEFILE) "$(used_cflags)" "$(used_lflags)"; \
	  perl $(MAKE_MAKEFILE) "$(used_cflags)" "$(used_lflags)" )

Makefile.PL : $(MAKE_MAKEFILE)
	( \
		echo "system('perl $< \"$(used_cflags)\" \"$(used_lflags)\"');" \
	) > $@

ARB.xs : $(ARB_PROTO_2_XSUB) proto.h ARB.default.xs perlmain_source.c typemap
	@(test -f $@ && chmod a+w $@) || true
	$(ARB_PROTO_2_XSUB) proto.h ARB.default.xs typemap >$@
	@test -f $@ && chmod a-w $@

proto.h : $(HEADERS) $(THIS) depends.stamp
	cat $(HEADERS) > $@

debug.h : $(THIS)
	echo "#undef DEBUG" > $@
	echo "#undef NDEBUG" >> $@
ifeq ($(DEBUG),1)
	echo "#define DEBUG" >> $@
else
	echo "#define NDEBUG" >> $@
endif

c_source: $(TARGET_SO)
	test -f ARB.c || (echo "Error: Expected ARB.c to exist, but it doesn't"; false)

$(DOC): proto.h extract_perl_interface.pl c_source
	./extract_perl_interface.pl > $(DOC)

clean:
	-test -f Makefile && $(MAKE) clean
	rm -f Makefile.old proto.h debug.h ARB.c ARB.xs .depends depends.stamp Makefile.PL $(TARGETS) $(DOC)
	rm -f Makefile

.depends: depends.stamp Makefile.main
	@echo "-------- recurse $(THIS) to build C-module"
	+test -f ARB.c || $(MAKETHIS) "AUTODEPENDS=0" ARB.c
	@echo "-------- done recurse $(THIS)"
	$(MAKEDEPEND) -f- $(MAKEDEPENDFLAGS) ARB.c 2>/dev/null | \
		perl -ne 's/ARB.o:/depends.stamp:/g; print $$_;' | \
		../SOURCE_TOOLS/fix_depends.pl "(from PERL2ARB)" > $@


depends.stamp:
	touch $@

ifeq ($(AUTODEPENDS),2)
include .depends
endif