From 8329d9a40d821f1e851da1c400fb9461d1cbf1b6 Mon Sep 17 00:00:00 2001
From: Derek Tan <derektanbusiness@gmail.com>
Date: Sun, 30 Jun 2024 00:09:02 -0400
Subject: [PATCH] testing Makefile

---
 src/Makefile | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 src/Makefile

diff --git a/src/Makefile b/src/Makefile
new file mode 100644
index 0000000..970589a
--- /dev/null
+++ b/src/Makefile
@@ -0,0 +1,33 @@
+# Universal makefile for single C++ program
+#
+# Use gcc flag -MMD (user) or -MD (user/system) to generate dependencies among source files.
+# Use make default rules for commonly used file-name suffixes and make variables names.
+#
+# % make [ a.out ]
+
+########## Variables ##########
+
+CXX = g++					# compiler
+CXXFLAGS = -std=c++20 -g -Wall -MMD			# compiler flags
+MAKEFILE_NAME = ${firstword ${MAKEFILE_LIST}}	# makefile name
+
+SOURCES = $(wildcard *.cc)			# source files (*.cc)
+OBJECTS = ${SOURCES:.cc=.o}			# object files forming executable
+DEPENDS = ${OBJECTS:.o=.d}			# substitute ".o" with ".d"
+EXEC = a.out					# executable name
+
+########## Targets ##########
+
+.PHONY : clean					# not file names
+
+${EXEC} : ${OBJECTS}				# link step
+	${CXX} ${CXXFLAGS} $^ -o $@		# additional object files before $^
+
+${OBJECTS} : ${MAKEFILE_NAME}			# OPTIONAL : changes to this file => recompile
+
+# make implicitly generates rules to compile C++ files that generate .o files
+
+-include ${DEPENDS}				# include *.d files containing program dependences
+
+clean :						# remove files that can be regenerated
+	rm -f ${DEPENDS} ${OBJECTS} ${EXEC}