advent_of_code/Makefile

# select all cpp files, for future use
SRC := ${shell find ./ -name "*.c"}
BIN := $(SRC:.c=)

# -pedantic means using gnu extentions will throw an error
# this allows for better code portability between compilers
CFLAGS := -std=c17
CFLAGS_ERRORS := -Werror -Wall -Wextra -Wconversion -Wdouble-promotion -Wunreachable-code -Wshadow -Wpedantic -pedantic-errors -pedantic

# debug is enabled by default
# debug can be disabled with `make DEBUG=0`
DEBUG := 1

ifeq ($(DEBUG),1)
# -Og compiles with debug specific optimizations
# -g3 compiles with max debug information
	CFLAGS += -Og -g3
else
# -O3 compiles with extreme optimizations for performance
# -flto compiles with link time optimizations (LTO), supposed to improve performance by ~5%
	CFLAGS += -O3 -flto
# -s when run on the linker will strip out debug symbols for a smaller file size
	LDFLAGS += -s -flto
endif

# I believe using c++ is better since not every installation has gcc
# this can always be overridden with `make CC=gcc` if needed
CC := cc

all: $(BIN)

.c:
	$(CC) $(CFLAGS) $(CFLAGS_ERRORS) $(LDFLAGS) -o $@ $^

clean:
	rm $(BIN)

.PHONY: clean