forked from Vhex-Kernel-Core/fxlibc
304 lines
6.5 KiB
Makefile
304 lines
6.5 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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# TODO:
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# * generate all libraries for all ABI by default ?
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# * handle versionning
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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 := ../include
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cflags := $(machine) -ffreestanding -nostdlib -Wall -Wextra -std=c11 -Os \
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-fstrict-volatile-bitfields -I$(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_object := object
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dir_output := output
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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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directory := $(shell find ../src -not -path "*/\.*" -type d)
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src := $(foreach path,$(directory), \
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$(wildcard $(path)/*.c) \
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$(wildcard $(path)/*.S) \
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$(wildcard $(path)/*.s))
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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 = $(CONFIG.TOOLCHAIN)-objcopy
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#---
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# Version management
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#---
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# TODO
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#---
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# Build rules
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#---
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# (Make selects the first rule when you type "make" and I don't want the first
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# rule to be "%/" so here's a placeholder)
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first: all
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# Create directory helper
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# @note: Just use "$*" and "$@" to refer to the directory being created.
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%/:
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@ printf "Create $(blue)$*$(nocolor) directory\n"
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@ mkdir -p $@
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.PRECIOUS: %/
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#---
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# Automated rules
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#---
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# common part used to compile source file
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# @params:
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# *1 - source file path
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# *2 - build directory path (output)
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# TODO:
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# * handle custom cflags (format, abi management)
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# * handle verbose option
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define compile-src
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$(patsubst .._src_%,$2/%.o,$(subst /,_,$(basename $1))): $1 | $2/
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@ printf "compiling $(white)$$@$(nocolor)..."
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@ $(gcc) $(cflags) -o $$@ -c $$< -lgcc
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@ printf "$(green)[ok]$(nocolor)\n"
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endef
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# common part used by all library geneation
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# @params:
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# * 1 - library name
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# * 2 - format (dynamic/static)
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# * 3 - source file list
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define generate-target
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# generate the library name based on the wanted formats
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lib-output-dir := $(dir_output)/$2/
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lib-build-dir := $(dir_object)/$2/$1/
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ifeq ($2,dynamic)
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lib-name := $$(lib-output-dir)/lib$1.so
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lib-cflags := -pic $(cflags)
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else
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lib-name := $$(lib-output-dir)/lib$1.a
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lib-cflags := $(cflags)
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endif
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# indicate the new lib that will be ouputed
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generated-libs += $$(lib-name)
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# generate all file object name
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$$(foreach source,$3,$$(eval \
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$$(call compile-src,$$(source),$$(lib-build-dir)) \
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))
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# link the library
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# @note: based on the wanted format
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ifeq ($2,shared)
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$$(lib-name): $$(patsubst .._src_%,$$(lib-build-dir)/%.o,$$(subst /,_,$$(basename $3))) | $$(lib-output-dir)
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$(gcc) -shared -o $$@ $$^ -nostdlib -lgcc
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else
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$$(lib-name): $$(patsubst .._src_%,$$(lib-build-dir)/%.o,$$(subst /,_,$$(basename $3))) | $$(lib-output-dir)
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$(ar) crs $$@ $$^
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endif
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endef
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# create all "target" variable used to determine which format
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# and which libraries will be generated.
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# @note:
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# * we force default variable if nothing is set
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target-formats := $(if $(CONFIG.FORMAT),$(CONFIG.FORMAT),static)
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target-libs := $(if $(CONFIG.TARGET),$(CONFIG.TARGET),fxlibc)
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# create a variable that will be updated during the generation of
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# the dynamic make code generation (generated by the "foreach")
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generated-libs :=
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# Generate all targets
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$(foreach format,$(target-formats), \
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$(foreach lib,$(target-libs),$(eval \
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$(call generate-target,$(lib),$(format),$(src)) \
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)) \
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)
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#---
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# Build rule
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#---
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all: $(generated-libs)
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DEBUG=$(call generate-target,fxlibc,static,$(dir_objects),$(src))
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export DEBUG
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debug:
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@ echo "$$DEBUG"
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@ echo "target-lib: $(target-libs)"
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@ echo "generated lib: $(generated-libs)"
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@ echo "target format: $(target-formats)"
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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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#---
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# Build rules
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#---
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#all: $(target)
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#
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## linker part
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#$(target): $(obj) | $(dir_bin)
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# $(ar) crs $@ $^
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#
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## installation part
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#install: $(target)
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# install -d $(CONFIG.PREFIX)
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# install $(target) -m 644 $(CONFIG.PREFIX)
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# cp -r $(header) $(CONFIG.PREFIX)/include/fxlibc
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#uninstall:
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# rm -f $(CONFIG.PREFIX)/$(target)
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# rm -rf $(CONFIG.PREFIX)/include/fxlibc
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#
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## Directory management
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#$(dir_bin) $(dir_objects):
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# @ printf "Create $(blue)$@$(nocolor) directory\n"
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# @ mkdir -p $@
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#
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#.PHONY: all install uninstall
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#
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#
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#
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##define rule-src
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##$(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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##
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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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#
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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 ' * install install the library and headers to the PREFIX'
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# @ echo ' * uninstall uninstall the library and headers of the PREFIX'
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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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#
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#disasm:
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# @ $(objdump) -D $(target) | less
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#
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#elf_sec:
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# @ $(objdump) -h $(target) | less
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#
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#.PHONY: help __debug disasm elf_sec
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#
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#
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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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#
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#fclean: clean
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# rm -rf $(dir_bin)
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#
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#re: fclean clean
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#
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#.PHONY: clean fclean re
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