#
# Makefile for MARS
#

ifneq ($(KBUILD_EXTMOD),)
  CONFIG_MARS_BIGMODULE := m
endif

KBUILD_CFLAGS += -fdelete-null-pointer-checks

mars-objs :=				\
	lamport.o			\
	brick_say.o			\
	brick_mem.o			\
	brick.o				\
	mars_generic.o			\
	lib_log.o			\
	lib_rank.o			\
	lib_limiter.o			\
	lib_timing.o			\
	lib_mapfree.o			\
	mars_net.o			\
	mars_server.o			\
	mars_client.o			\
	mars_aio.o			\
	mars_sio.o			\
	mars_bio.o			\
	mars_if.o			\
	mars_copy.o			\
	mars_trans_logger.o		\
	sy_old/sy_generic.o		\
	sy_old/sy_net.o			\
	sy_old/mars_proc.o		\
	sy_old/mars_light.o

obj-$(CONFIG_MARS_BIGMODULE)	+= mars.o

#### alternatives when building small individual modules

obj-$(CONFIG_MARS_DUMMY)	+= mars_dummy.o
obj-$(CONFIG_MARS_CHECK)	+= mars_check.o
obj-$(CONFIG_MARS_IF)		+= mars_if.o
obj-$(CONFIG_MARS_BIO)		+= mars_bio.o
obj-$(CONFIG_MARS_AIO)		+= mars_aio.o
obj-$(CONFIG_MARS_SIO)		+= mars_sio.o
obj-$(CONFIG_MARS_BUF)		+= mars_buf.o
obj-$(CONFIG_MARS_USEBUF)	+= mars_usebuf.o
obj-$(CONFIG_MARS_TRANS_LOGGER)	+= mars_trans_logger.o lib_log.o
obj-$(CONFIG_MARS_SERVER)	+= mars_server.o
obj-$(CONFIG_MARS_CLIENT)	+= mars_client.o
obj-$(CONFIG_MARS_COPY)		+= mars_copy.o

obj-$(CONFIG_MARS_LIGHT)	+= sy_old/mars_light.o \
				   brick.o brick_mem.o brick_say.o \
				   mars_generic.o sy_old/sy_generic.o \
				   mars_net.o sy_old/sy_net.o \
				   sy_old/mars_proc.o

ifdef CONFIG_DEBUG_KERNEL

KBUILD_CFLAGS += -fno-inline-functions -fno-inline-small-functions -fno-inline-functions-called-once

# This is currently not really used.
# We urge people to maintain it by including it in debug versions
# (so the compiler may throw any complaints)

mars-objs += 				\
	mars_dummy.o			\
	mars_check.o			\
	mars_buf.o			\
	mars_usebuf.o			\

endif

#
# buildtag.h should be regenerated in every build.
#
# The version is determined by the following preference order:
# 1) environment variable $MARSVERSION
# 2) when git is available: git describe --tags
# 3) if a file 'DISTVERSION' exists (out-of-tree tarball), use its content.
# 4) otherwise "no-buildtag-available"
#
extra-y	+= buildtag.h
$(obj)/buildtag.h: $(patsubst $(obj)/buildtag.h,,$(wildcard $(obj)/*.[ch])) $(obj)/*/*.[ch]
	$(Q)$(kecho) "MARS: Generating $@"
	$(Q)set -e; \
	exec > $@;\
	/bin/echo -e "/* Automatically generated -- DO NOT EDIT! */";\
	cd $(src); \
	if [ "$$MARSVERSION" != "" ]; then \
		BUILDTAG="$$MARSVERSION"; \
	elif git describe --tags >/dev/null 2>&1; then \
		BUILDTAG="$$(git describe --tags)"; \
	elif [ -e DISTVERSION ]; then \
		BUILDTAG=$$(cat DISTVERSION); \
	else \
		BUILDTAG="no-buildtag-available"; \
	fi; \
	/bin/echo -e "#define BUILDTAG  \"$$BUILDTAG\"";\
	/bin/echo -e "#define BUILDHOST \"$$USER@`hostname`\"";\
	/bin/echo -e "#define BUILDDATE \"$$(date '+%F %T')\""
	cat $@;

ifndef CONFIG_MARS
# mars_config.h is generated by a simple Kconfig parser (gen_config.pl)
# at build time.
# It does not respect any Kconfig dependencies.
# Therefore, it is unsafe. Use at your own risk!
# It is ONLY used for out-of-tree builds.
#
extra-y	+= mars_config.h
GEN_CONFIG_SCRIPT := $(src)/../scripts/gen_config.pl
$(obj)/mars_config.h: $(obj)/buildtag.h
$(obj)/mars_config.h: $(src)/Kconfig $(GEN_CONFIG_SCRIPT)
	$(Q)$(kecho) "MARS: using compiler $($(CC) --version | head -1)"
	$(CC) -v
	$(Q)$(kecho) "MARS: Generating $@"
	$(Q)set -e; \
	if [ ! -x $(GEN_CONFIG_SCRIPT) ]; then \
	    $(kecho) "MARS: cannot execute script $(GEN_CONFIG_SCRIPT)"; \
	    /bin/false; \
	fi; \
	cat $< | $(GEN_CONFIG_SCRIPT) > $@;
	cat $@;
endif