CC = clang

AXL_SOURCES = $(filter-out main.c %_test.c, $(wildcard *.c))
TEST_EXES   = $(patsubst %.c,%.exe,$(wildcard *_test.c))

TEST_CFLAGS = -Wall -Wextra -Werror -pedantic -std=c17 -static -Oz -fsigned-char

MINIMAL_CFLAGS = -nostdlib -ffreestanding -fno-builtin -mno-stack-arg-probe \
                 -fno-stack-protector -fno-unwind-tables -fno-exceptions -fno-rtti \
                 -fno-asynchronous-unwind-tables -fno-ident

LDFLAGS = -fuse-ld=lld -static \
          -Wl,/SUBSYSTEM:CONSOLE \
          -Wl,/ENTRY:_start \
          -Wl,/OPT:NOICF \
          -Wl,/OPT:NOREF \
          -Wl,/NODEFAULTLIB \
          -Wl,/MERGE:.rdata=.text

LIBS = -lkernel32

SOURCES = $(AXL_SOURCES) main.c
TARGET  = prog.exe

all: clean $(TARGET)

%_test.exe: %_test.c
	$(CC) $(TEST_CFLAGS) $(AXL_SOURCES) $< -o $@

test: clean $(TEST_EXES)
	@echo "=== Running tests ==="
	@for %%i in ($(TEST_EXES)) do (echo ---- %%i ---- && %%i || exit /b 1)

$(TARGET): $(SOURCES) 
	$(CC) $(TEST_CFLAGS) $(MINIMAL_CFLAGS) $^ -o $@ $(LDFLAGS) $(LIBS)

clean:
	-del /q *.exe *.o 2>nul 

.PHONY: all clean test