Makefile

C_SOURCES = $(wildcard src/**/*.c) $(wildcard src/*.c)
OBJ = $(subst src/,build/,$(C_SOURCES:.c=.o))

CC ?= clang
CFLAGS := -fno-omit-frame-pointer -O2 -nostdlib -ffreestanding -std=c2x -static -Wno-unused-parameter --target=riscv64 \
		  -Wno-unused-function -pedantic -Wall -Wextra -Wwrite-strings -Wstrict-prototypes -march=rv64i -mabi=lp64 -flto \
		  -I include -Wno-unused-function -fno-stack-protector -nodefaultlibs \
		  -fms-extensions -fno-PIC
AS ?= riscv64-unknown-elf-as
ASFLAGS := -march=rv64i -mabi=lp64
LD ?= ld.lld
LDFLAGS := -T link.ld -nostdlib
CT ?= clang-tidy

.PHONY: all clean clang-tindy

all: 
	echo $(C_SOURCES)
	@mkdir -p build
	make kernel

kernel: $(OBJ)
	$(LD) $(LDFLAGS) -o $@ $^

build/%.o: src/%.c $(HEADERS)
	$(CC) $(CFLAGS) -mcmodel=medany -c $< -o $@

build/%.o: src/%.S
	$(AS) $(ASFLAGS) -c $< -o $@

clang-tidy: $(C_SOURCES)
	-@$(CT) $^ --system-headers --checks=*,-altera-struct-pack-align,-cppcoreguidelines-*,-altera-id-dependent-backward-branch,-readability-magic-numbers,-cppcoreguidelines-avoid-magic-numbers,-hicpp-no-assembler,-llvm-header-guard,-bugprone-easily-swappable-parameters,-modernize-macro-to-enum,-cert-dcl51-cpp,-cert-dcl37-c,-bugprone-reserved-identifier,-readability-identifier-length,-altera-unroll-loops --warnings-as-errors=* -header-filter='.*' -- $(CFLAGS) 

clean:
	-rm -rf kernel $(OBJ)