Replace Makefile with current simple Makefile

Makefile

@@ -1,46 +1,31 @@
-BIN := $(shell basename $$(pwd))
+LDLIBS := -lscstring
+
+PROJ := $(shell basename $$(pwd))
 
 SRCS := $(wildcard *.cpp)
-OBJS := $(subst .cpp,.o,$(SRCS))
-DEPS := $(subst .cpp,.d,$(SRCS))
+OBJS := $(SRCS:.cpp=.o)
+DEPS := $(SRCS:.cpp=.dep)
 
 CXX ?= g++
-PKG_CONFIG ?= pkg-config
 
-PREFIX ?= /usr/local
-BINDIR ?= $(PREFIX)/bin
-DATADIR ?= $(PREFIX)/share
-MANDIR ?= $(DATADIR)/man
-
-RM := /bin/rm -f
-INSTALL := /usr/bin/install -c
-
-CXXFLAGS += -Wshadow -Wall -Wpedantic -Wextra -g -std=c++17
+CXXFLAGS += -Wshadow -Wall -Wpedantic -Wextra -Wno-unused-parameter
+CXXFLAGS += -g3 -std=c++20
 ifeq ($(DEBUG),1)
 	CXXFLAGS += -DDEBUG -O0
 else
-	CXXFLAGS += -O3
+	CXXFLAGS += -DNDEBUG -O3
 endif
 
-LDLIBS := -lm -lpthread -lscstring
-LDFLAGS :=
+%.o: %.cpp
+	$(CXX) $(CXXFLAGS) -MMD -MP -MT $@ -MF $*.dep -c $<
 
-all: $(BIN)
+%.dep: ;
 
-$(BIN): $(OBJS) $(DEPS)
-	$(CXX) $(OBJS) $(LDFLAGS) -o $(BIN) $(LDLIBS)
+$(PROJ): $(OBJS)
+	$(CXX) $(LDFLAGS) -o $(PROJ) $(OBJS) $(LDLIBS)
 
-%.o: %.cpp %.d Makefile
-	$(CXX) $(CXXFLAGS) -MMD -MP -MT $@ -MF $*.d -c $<
-
--include *.d
-
-%.d: ;
-
-.PHONY: clean install
+-include $(DEPS)
 
+.PHONY: clean
 clean:
-	$(RM) $(OBJS) $(DEPS) $(BIN)
-
-install: $(BIN)
-	$(INSTALL) $(BIN) $(DESTDIR)$(BINDIR)
+	rm -f $(OBJS) $(DEPS) $(PROJ)