Overhaul makefile, add include guards

Makefile

@@ -1,24 +1,69 @@
 TARGET = L1A
 SRC_FILES = main.cpp math.cpp
 
-# NO EDITS BELOW THIS LINE
+# Tyler's custom makefile extensions
+.DEFAULT_GOAL := all # Necessary so `make` doesn't run the "pack" target, as it is declared before "all"
+.PHONY: pack clean-run c run
+
+## Adds only the necessary files for build into a .tar.gz file, named appropriately
+ARCHIVED_FILES = Makefile $(SRC_FILES) $(SRC_FILES:.cpp=.h) $(SRC_FILES:.cpp=.hpp)
+pack:
+	tar --ignore-failed-read -czvf $(TARGET).tar.gz $(shell echo $(ARCHIVED_FILES) | xargs ls -d 2>/dev/null)
+
+## Runs the pack target and then attempts to build & run the program to make sure it functions correctly
+pack-test: pack
+	$(eval TMP := $(shell mktemp -d))
+	tar -xvzf $(TARGET).tar.gz --directory $(TMP)
+	make -C $(TMP)
+	$(TMP)/$(TARGET)
+	rm -rf $(TMP)
+
+## An extension of the clean command that is shorter to type and removes a potential .tar.gz file
+c: clean
+	$(DEL) -f $(TARGET).tar.gz
+
+## Simply builds and then executes the program
+run: all
+	./$(TARGET)
+
+# NO EDITS NEEDED BELOW THIS LINE
+
 CXX = g++
+CXXFLAGS = -O2
+CXXFLAGS_DEBUG = -g
+CXXFLAGS_WARN = -Wall -Wextra -Wunreachable-code -Wshadow -Wpedantic
+CPPVERSION = -std=c++17
+
 OBJECTS = $(SRC_FILES:.cpp=.o)
 
 ifeq ($(shell echo "Windows"), "Windows")
 	TARGET := $(TARGET).exe
 	DEL = del
+	Q =
 else
 	DEL = rm -f
+	Q = "
 endif
 
 all: $(TARGET)
 
 $(TARGET): $(OBJECTS)
-	$(CXX) -std=c++17 -o $@ $^
+	$(CXX) -o $@ $^
 
-%.o: %.cpp
-	$(CXX) -std=c++17 -o $@ -c $<
+.cpp.o:
+	$(CXX) $(CXXFLAGS) $(CPPVERSION) $(CXXFLAGS_DEBUG) $(CXXFLAGS_WARN) -o $@ -c $<
 
 clean:
-	$(DEL) $(TARGET) $(OBJECTS)
+	$(DEL) -f $(TARGET) $(OBJECTS) Makefile.bak
+
+depend:
+	@sed -i.bak '/^# DEPENDENCIES/,$$d' Makefile
+	@$(DEL) sed*
+	@echo $(Q)# DEPENDENCIES$(Q) >> Makefile
+	@$(CXX) -MM $(SRC_FILES) >> Makefile
+
+.PHONY: all clean depend
+
+# DEPENDENCIES
+main.o: main.cpp math.h
+math.o: math.cpp

math.h

@@ -1,3 +1,6 @@
+#ifndef MATH_H
+#define MATH_H
+
 double ideal_gas_law(double, double, double);
 
 double average_acceleration(double, double, double, double);
@@ -19,3 +22,5 @@ double stress(double, double);
 double shear_stress(double, double, double, double);
 
 double coulombs_law(double, double, double, double);
+
+#endif // MATH_H