169 lines
3.4 KiB
Makefile
169 lines
3.4 KiB
Makefile
#! /usr/bin/make -f
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#---
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#
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# fxlibc project Makefile
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#
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# This makefile is grandly inspired by the Gint unikernel
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# projet, many thanks to Lephenixnoir !
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#
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# Build architecture:
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# build/
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# |-- objects/
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# | |-- string_strlen.o
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# | |-- string_strcmp.o
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# | ...
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# | `-- signal_kill.o
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# |-- debug/
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# | |-- fxlibc.map (ELF link map informations)
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# | ...
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# | `-- otherinfo.txt
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# |-- Makefile
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# |-- fxlibc.cfg
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# `-- bin/
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# |-- fxlibc_stubs.a (workaround for the shared librairie, see documentation note)
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# |-- fxlibc.so (shared librairy)
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# `-- fxlibc.a (static librairy)
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#---
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#---
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# Build configuration
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#---
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# Require configuration file (if you want to clean up and lost the file, you
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# can either reconfigure or just delete the build directory)
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CONFIG := fxlibc.cfg
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ifeq "$(wildcard $(CONFIG))" ""
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$(error "config file $(CONFIG) does not exist (reconfigure or wipe directory)")
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endif
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include $(CONFIG)
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# Compiler flags, assembler flags, dependency generation, archiving
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header := -I ../include
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cflags := $(machine) -ffreestanding -nostdlib -Wall -Wextra -std=c11 -Os \
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-fstrict-volatile-bitfields $(header) $(CONFIG.CFLAGS)
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# color definition
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red := \033[1;31m
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green := \033[1;32m
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blue := \033[1;34m
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white := \033[1;37m
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nocolor := \033[1;0m
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# This is a workaround to force a newline when the "eval" keyword is involved
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define n
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# Force newline character
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endef
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# Define all directory used to stored informations
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dir_objects := objects
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dir_bin := bin
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# Output configurations
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name := fxlibc
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target := $(dir_bin)/$(name).a
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# automated variable
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src :=
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directory := $(shell find ../src/ -not -path "*/\.*" -type d)
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$(foreach path,$(directory),$(eval \
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src += $(wildcard $(path)/*.c) $n\
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src += $(wildcard $(path)/*.S) $n\
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src += $(wildcard $(path)/*.s) $n\
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))
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obj := $(patsubst .._src_%,$(dir_objects)/%.o,$(subst /,_,$(basename $(src))))
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# check if any file have been found
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ifeq ($(obj),)
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$(error "source file does not exist (reconfigure or wipe directory)")
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endif
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#---
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# Toolchain
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#---
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gcc = $(CONFIG.TOOLCHAIN)-gcc
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as = $(CONFIG.TOOLCHAIN)-as
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ld = $(CONFIG.TOOLCHAIN)-ld
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ar = $(CONFIG.TOOLCHAIN)-ar
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objcopy = $(CONFIG.TOOLCHAIN)-objcopy
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#---
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# Version management
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#---
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# TODO
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#---
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# Build rules
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#---
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all: $(target)
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# linker part
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$(target): $(obj) | $(dir_bin)
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$(ar) crs $@ $^
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# Directory management
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$(dir_bin) $(dir_objects):
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@ printf "Create $(blue)$@$(nocolor) directory\n"
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@ mkdir -p $@
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.PHONY: all
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#---
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# Automated rules
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#---
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define rule-src
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$(patsubst .._src_%,$(dir_objects)/%.o,$(subst /,_,$(basename $1))): $1 | $(dir_objects)
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@ printf "compiling $(white)$$<$(nocolor)..."
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@ $(gcc) $(cflags) -o $$@ -c $$< -lgcc
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@ printf "$(green)[ok]$(nocolor)\n"
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endef
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$(foreach source,$(src),$(eval \
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$(call rule-src,$(source))) \
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)
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#---
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# Debugging rules
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#---
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help:
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@ echo 'make [options]...'
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@ echo ''
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@ echo 'Options:'
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@ echo ' * disasm use objdump to display the content of the archive'
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@ echo ' * debug display source files name and objects name'
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@ echo ' * elf_sec display ELF section of the archive'
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__debug:
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@ echo 'src: $(src)'
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@ echo ''
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@ echo 'obj: $(obj)'
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@ echo ''
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@ echo 'directory: $(dir_bin) $(dir_output) $(dir_objects)'
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disasm:
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@ $(objdump) -D $(target) | less
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elf_sec:
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@ $(objdump) -h $(target) | less
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.PHONY: help __debug disasm elf_sec
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#---
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# clean rules
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#---
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clean:
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rm -rf $(dir_objects)
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fclean: clean
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rm -rf $(dir_bin)
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re: fclean clean
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.PHONY: clean fclean re
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