make some makefile changes, to make things more consise

makefile

@@ -1,12 +1,15 @@
 NAME = sdl_template
-CFLAGS = -Wall -g -march=x86-64 -lm
 
-DIR_BIN = bin
-DIR_OBJ = obj
+# compiler settings
+CC := clang
+CFLAGS := -Wall -g
+LDFLAGS = $(shell sdl2-config --cflags --libs) -lm
 
+# file locations
+DIR_BIN := bin
+DIR_OBJ := obj
 SRC = $(wildcard src/*.c) $(wildcard src/**/*.c) $(wildcard src/**/**/*.c) $(wildcard src/**/**/**/*.c) $(wildcard src/**/**/**/**/*.c)
 OBJ = $(patsubst src/%,$(DIR_OBJ)/$(ARCH)/%,$(SRC:.c=.o))
-
 TARGET = $(DIR_BIN)/$(ARCH)/$(NAME)$(EXT)
 
 clean:
@@ -14,22 +17,22 @@ clean:
 
 # sets the variables for the different targets
 linux-x86_64:
-	$(MAKE) build ARCH=linux-x86_64 CC=clang PCFLAGS="-target x86_64-pc-linux-gnu -lSDL2"
+	$(MAKE) build ARCH=linux-x86_64 CFLAGS="$(CFLAGS) -target x86_64-pc-linux-gnu"
 win-x86_64:
-	$(MAKE) build ARCH=win-x86-64 CC=clang PCFLAGS="-target x86_64-pc-windows-gnu -lmingw32 -lSDL2main -lSDL2 -mwindows" EXT=".exe"
+	$(MAKE) build ARCH=win-x86-64 CFLAGS="$(CFLAGS) -target x86_64-pc-windows-gnu" EXT=".exe"
 web:
-	$(MAKE) build ARCH=web CC=emcc PCFLAGS="-s USE_SDL=2" EXT=".html"
+	$(MAKE) build ARCH=web CC=emcc EXT=".html"
 
 build: dirs binary
 
 # creates the binary
 binary: $(OBJ)
-	$(CC) -o $(TARGET) $^ $(CFLAGS) $(PCFLAGS)
+	$(CC) -o $(TARGET) $^ $(CFLAGS) $(LDFLAGS)
 
 # creates the object files, include a flag for no unused command line arguments, because in this context it's unneeded
 $(DIR_OBJ)/$(ARCH)/%.o: src/%.c
 	mkdir -p $(dir $@)
-	$(CC) -o $@ -c $< $(CFLAGS) $(PCFLAGS) -Wno-unused-command-line-argument
+	$(CC) -o $@ -c $< $(CFLAGS) $(LDFLAGS) -Wno-unused-command-line-argument
 
 dirs:
 	mkdir -p $(DIR_BIN)/$(ARCH)