include Makefile.cfg

target=fx9860g

CONFIG.TARGET = fx
CONFIG.TARGET.LONG = fx9860g
PREFIX = /usr/lib/gcc/sh3eb-elf/9.1.0/
toolchain = sh3eb-elf
CONFIG.MACROS = -DFX9860G

machine := -m3 -mb


# Compiler flags, assembler flags, dependency generation, archiving
cflags  := $(machine) -ffreestanding -nostdlib -Wall -Wextra -std=c11 -Os \
           -fstrict-volatile-bitfields -I include $(CONFIG.MACROS) \
           $(CONFIG.CFLAGS) $(FLAGS)
sflags  := $(CONFIG.MACROS)
dflags   = -MMD -MT $@ -MF $(@:.o=.d) -MP
arflags :=


# Target file
target := libfxengine.a

# Automatic names for object and dependency files
src2obj = $(1:src/%=build/%).o
src2dep = $(1:src/%=build/%).d

# Source files
src      := $(shell find src \
                    -name '*.[csS]' -print)
src_obj  := $(foreach s,$(src),$(call src2obj,$s))


# All object files
obj := $(src_obj) $(spe_obj)


#
#  Toolchain
#

gcc	= $(toolchain)-gcc
as	= $(toolchain)-as
ld	= $(toolchain)-ld
ar	= $(toolchain)-ar
objcopy	= $(toolchain)-objcopy


#
#  Version management
#

# Version symbol is obtained by using the last commit hash on 7 nibbles
version_hash = 0x0$(shell git rev-parse --short HEAD)


#
#  Build rules
#

all: $(target)

$(target): $(obj)
	$(call cmd_l,ar,$@) $(ar) rcs $(arflags) $@ $^

# Assembler sources
build/%.s.o: src/%.s build/%.s.d
	@ mkdir -p $(dir $@)
	$(call cmd_b,as,$*.s) $(gcc) -c $< -o $@ $(sflags)
build/%.S.o: src/%.S build/%.S.d
	@ mkdir -p $(dir $@)
	$(call cmd_b,as,$*.S) $(gcc) -c $< -o $@ $(sflags)

# C sources
build/%.c.o: src/%.c build/%.c.d
	@ mkdir -p $(dir $@)
	$(call cmd_b,gcc,$*.c) $(gcc) -c $< -o $@ $(dflags) $(cflags)

# Version symbol. ld generates a .stack section for unknown reasons; I remove
# it in the linker script.
version.o: ../.git/HEAD
	@ mkdir -p $(dir $@)
	@ echo "_FXENGINE_VERSION = $(version_hash);" > $@.txt
	$(call cmd_b,ld,$@) $(ld) -r -R $@.txt -o $@


#
#  Installing
#

m644 := -m 644

# Disable -m on Mac OS
ifeq "$(shell uname)" "Darwin"
m644 :=
endif

uninstall:
	rm -f $(PREFIX)/$(target)
	rm -rf $(PREFIX)/include/fxengine

install:
	@make uninstall
	install -d $(PREFIX)
	install $(target) $(m644) $(PREFIX)
	cp -r include/fxengine $(PREFIX)/include



#
#  Utilities
#

# Directories: make conveniently leaves a '/' at the end of $(dir ...)
%/:
	@ mkdir -p $@
# Don't try to unlink directories once they're built (that wouldn't work =p)
.PRECIOUS: %/

# Dependency information
-include $(shell [ -d src ] && find src -name *.d)
build/%.d: ;
.PRECIOUS: build/%.d

.PHONY: all clean distclean

# Do not output full commands by default
VERBOSE	?=