# Makefile.modinc includes rules for building HAL realtime modules outside
# the emc2 source tree.  It has three useful targets:
#
# modules
#   Actually build the modules
#
# clean
#   Cleans up files made by 'modules'
#
# install
#   Installs the modules

# An example Makefile using Makefile.modinc to build one kernel module from a
# single source file would read:
# 
# obj-m += example.o
# include .../Makefile.modinc

# An example Makefile using Makefile.modinc to build one kernel module from
# several source files would read:
# 
# obj-m += complex.o
# complex-objs := complex1.o complex2.o complex_main.o
# include .../Makefile.modinc

# Currently this Makefile is only suitable for 'kbuild' and 'sim' systems, but
# there is no technical reason it cannot be extended to pre-kbuild systems.

# When there is a single module and it consists of a single source file, an
# easier way to build modules is to invoke 'comp':
#  comp --compile example.c
# or
#  comp --install example.c

BUILDSYS = sim

KERNELDIR := 
CC := gcc
RTFLAGS = -DSIMULATOR 
RTFLAGS := -g -I. -I/pub/emc/emc2/src/include $(RTFLAGS) -DRTAPI -D_GNU_SOURCE -Drealtime -D_FORTIFY_SOURCE=0
USE_RTLIBM = 
EMC2_HOME=/pub/emc/emc2
RUN_IN_PLACE=yes
ifeq ($(RUN_IN_PLACE),yes)
EXTRA_CFLAGS := $(RTFLAGS) -D__MODULE__ -I$(EMC2_HOME)/include
RTLIBDIR := /pub/emc/emc2/rtlib
LIBDIR := /pub/emc/emc2/lib
else
prefix := /pub/emc/emc2
EXTRA_CFLAGS := $(RTFLAGS) -D__MODULE__ -I${prefix}/include/emc2
RTLIBDIR := /pub/emc/emc2/rtlib
LIBDIR := ${exec_prefix}/lib
endif

ifeq ($(BUILDSYS),kbuild)
modules:
	$(MAKE) -C $(KERNELDIR) SUBDIRS=`pwd` CC=$(CC) V=0 -o $(KDIR)/Module.symvers modules

clean:
	rm *.ko *.mod.c *.o

install:
	cp $(patsubst %.o,%.ko,$(obj-m)) $(DESTDIR)$(RTLIBDIR)/
endif

ifeq ($(BUILDSYS),sim)
EXTRA_CFLAGS += -DSIM -fPIC
allmodules = $(patsubst %.o,%.so,$(obj-m))
modules: $(allmodules)

install:
	cp $(allmodules) $(DESTDIR)$(RTLIBDIR)/

getobjs = $(if $(filter undefined, $(origin $(1)-objs)), $(1).o, $($(1)-objs))
getsrcs = $(patsubst %.o,%.c,$(call getobjs,$(1)))

maks := $(patsubst %.o,.%.modinc,$(obj-m))

.PHONY: %.so
%.so:
	$(CC) -shared -o $@ $(EXTRA_CFLAGS) $(call getsrcs,$*)
endif

ifeq ($(BUILDSYS),normal)
$(error Makefile.modinc is only suitable for 'kbuild' kernels and 'sim' systems)
endif