Clean up wav2agb's Makefile

tools/wav2agb/Makefile

@@ -1,33 +1,23 @@
-GIT_VERSION := $(shell git describe --abbrev=7 --dirty --always --tags)
+CXX ?= g++
+
+CXXFLAGS := -Wall -Werror -std=c++17 -O2
+
+SRCS := $(wildcard *.cpp)
+HEADERS := $(wildcard *.h)
 
-CXX = g++
-STRIP = strip
-CXXFLAGS = -Wall -Wextra -Wconversion -std=c++17 -O2 -g -DGIT_VERSION=\"$(GIT_VERSION)\"
 EXE :=
 ifeq ($(OS),Windows_NT)
   EXE := .exe
 endif
 BINARY = wav2agb$(EXE)
 
-SRC_FILES = $(wildcard *.cpp)
-OBJ_FILES = $(SRC_FILES:.cpp=.o)
+.PHONY: all clean
 
-LDFLAGS :=
-
-ifneq (,$(RELEASE))
-  LDFLAGS += -static
-  CXXFLAGS += -flto
-endif
-
-.PHONY: clean clean
 all: $(BINARY)
+	@:
+
+$(BINARY): $(SRCS) $(HEADERS)
+	$(CXX) $(CXXFLAGS) $(SRCS) -o $@ $(LDFLAGS)
 
 clean:
-	rm -f $(OBJ_FILES) $(BINARY)
-
-$(BINARY): $(OBJ_FILES)
-	$(CXX) $(CXXFLAGS) $(LDFLAGS) -o $@ $^
-	if [ $(RELEASE)x != x ]; then strip -s $@; fi
-
-%.o: %.cpp
-	$(CXX) -c -o $@ $< $(CXXFLAGS)
+	$(RM) $(BINARY)