# kpy/ -- the Python binding of the Klammermachine.
#
# klammertext.cpp is a CPython extension module (see its header comment).
# Like ref/reflect.so and sks/document/document.so it links against
# libklammertext.so and shares the engine's class layouts, so it is rebuilt
# whenever they are (mac/Makefile's "all" runs "make -C kpy"; com/Makefile's
# "redo" and dev/rebuild.sh clean it -- a clean that misses a directory is a
# mixed-object hazard, not a tidiness one).
#
# The module's filename carries the interpreter's ABI tag
# (klammertext.cpython-3XX-<arch>.so) from python3-config, the same tool
# makefile.env takes the include and link flags from: the module is bound to
# the ONE Python the library was built against, by decision.  The library
# already links that libpython, so the link line is the commands' link line
# with $(SHARED) in place of $(EXPORT_DYNAMIC).

K := $(KLAMMERTEXT_HOME)

include $(K)/env/makefile.env

LIBDIR := $(K)/lib
LIBRARY := $(LIBDIR)/libklammertext.so

EXT_SUFFIX := $(shell $(PYTHON) -c 'import sysconfig; print(sysconfig.get_config_var("EXT_SUFFIX"))')
MODULE := klammertext$(EXT_SUFFIX)

# "../lib": the module sits in $(K)/kpy, one level below $(K).
KPY_LDFLAGS := $(SHARED) -Wl,-rpath,'$(ORIGIN)/../lib' -L$(LIBDIR)

OBJECTS := klammertext.o
DEPFILES := $(OBJECTS:.o=.d)

DEPFLAGS = -MMD -MP -MF $(@:.o=.d)

.PHONY: all clean

# Windows: the module's dependent DLLs sit beside it (Python loads an
# extension's dependencies from the extension's own directory, never from
# PATH or an rpath -- there is none on PE); see makefile.env.
ifneq (,$(filter MINGW% MSYS%,$(UNAME_S)))
BESIDE_DLLS := libklammertext.so $(GCC_RUNTIME_DLLS)
else
BESIDE_DLLS :=
endif

all : $(MODULE) $(BESIDE_DLLS)

%.o : %.cpp
	@echo Compiling $<
	$(CXX) -c $(CPPFLAGS) $(CXXFLAGS) $(DEPFLAGS) $< -o $@

$(MODULE) : $(OBJECTS) $(LIBRARY)
	$(CXX) $(CPPFLAGS) $(CXXFLAGS) $(KPY_LDFLAGS) $(LDFLAGS) \
		-o $@ $(OBJECTS) $(KLAMMERTEXT_LIB) $(LDLIBS)

ifneq (,$(filter MINGW% MSYS%,$(UNAME_S)))
libklammertext.so : $(LIBRARY)
	cp $< $@
%.dll : $(GCC_BIN)%.dll
	cp $< $@
endif

clean :
	rm -f $(OBJECTS) $(DEPFILES) klammertext.*.so klammertext.*.pyd libklammertext.so *.dll *~
	rm -rf __pycache__

-include $(DEPFILES)