.RECIPEPREFIX = >
.DEFAULT_GOAL = build/main.out
CXX = clang++
CXXFLAGS += -std=c++26 -Wno-experimental-header-units
LDFLAGS += -std=c++26
SYSTEMHEADER_FLAGS = -Wno-deprecated-builtins -Wno-pragma-system-header-outside-header -Wno-keyword-compat
build_module_path = $(let first rest,$1,$(if $(rest),-fmodule-file=$(first) $(call build_module_path,$(rest)),-fmodule-file=$(first)))

build/main.out: build/main.o
> $(CXX) $(LDFLAGS) $^ -o $@

build/main.o: main.cxx build/print.pcm build/type_traits.pcm
> $(CXX) $(CXXFLAGS) -c $(filter-out %.pcm,$^) $(call build_module_path,$(filter %.pcm,$^))
> @mv $(patsubst build/%,%,$@) $@

build/%.pcm:
> $(CXX) $(CXXFLAGS) -xc++-system-header --precompile $(patsubst build/%.pcm,%,$@) -o $@ $(SYSTEMHEADER_FLAGS)

.PHONY: clean run
clean:
> @-rm -rf ./build/*
bear: clean
> bear -- $(MAKE)

run: $(.DEFAULT_GOAL)
> @./$(.DEFAULT_GOAL)