# Builds every .cpp in this tree into a binary next to its source.
# Incremental: a file is recompiled only when its .cpp is newer than its binary.
# Flags come from the compile_flags.txt nearest the source (the file clangd
# reads), falling back to the one at the repo root.
CXX   := clang++
ROOT  := $(dir $(abspath $(lastword $(MAKEFILE_LIST))))
SRCS  := $(shell find $(ROOT) -name '*.cpp')
BINS  := $(basename $(SRCS))

# The `@:` recipe is a deliberate no-op. Without it, make prints
# "Nothing to be done for 'all'" whenever everything is already up to date.
all: $(BINS)
	@:

%: %.cpp
	@flags=$$(cat $(dir $<)compile_flags.txt 2>/dev/null || cat $(ROOT)compile_flags.txt 2>/dev/null); \
	echo "compiling $(notdir $<)"; \
	$(CXX) $$flags $< -o $@

clean:
	@rm -f $(BINS)
	@echo "cleaned"

.PHONY: all clean