improved Makefile

added ability to build in Release mode as well as Debug mode. To build in Debug run `make [...] DEBUG=1`
By default, `make [...]` will build as a Release

Makefile

@@ -3,12 +3,21 @@
 # 'make clean'  removes all .o and executable files
 #
 
+# Debug mode is disabled by default. To build in debug, use `make DEBUG=1`
+DEBUG=
+
 # CXX compiler to use
 CXX = g++
 
 LIBRARIES := libcurl
 
-CXXFLAGS := `pkg-config --cflags $(LIBRARIES)` -std=c++20 -O3 -Wall -Wextra -g
+CFLAGS_DEBUG=-g
+CFLAGS_RELEASE=-O3
+
+CXXFLAGS_COMMON := `pkg-config --cflags $(LIBRARIES)` -std=c++20 -Wall -Wextra
+CXXFLAGS_DEBUG := $(CXXFLAGS_COMMON) $(CFLAGS_DEBUG)
+CXXFLAGS_RELEASE := $(CXXFLAGS_COMMON) $(CFLAGS_RELEASE)
+
 LFLAGS    = `pkg-config --libs $(LIBRARIES)`
 
 OUTPUT	:= output
@@ -54,7 +63,16 @@ DEPS	   := $(OBJECTS:.o=.d)
 
 OUTPUTMAIN := $(call FIXPATH,$(OUTPUT)/$(MAIN))
 
+ifeq ($(DEBUG), 1)
+CXXFLAGS:=$(CXXFLAGS) $(CXXFLAGS_DEBUG)
+MODESTR := Debug
+else
+CXXFLAGS:=$(CXXFLAGS) $(CXXFLAGS_RELEASE)
+MODESTR := Release
+endif
+
 all: $(OUTPUT) $(MAIN)
+	$(info Building in $(MODESTR) mode)
 	@echo Executing 'all' complete!
 
 $(OUTPUT):
@@ -68,7 +86,8 @@ $(MAIN): $(OBJECTS)
 .cpp.o:
 	$(CXX) $(CXXFLAGS) $(INCLUDES) -c -MMD $<  -o $@
 
-.PHONY: clean
+.PHONY: clean run
+
 clean:
 	$(RM) $(OUTPUTMAIN)
 	$(RM) $(call FIXPATH,$(OBJECTS))