updated makefile

Makefile

@@ -1,16 +1,19 @@
-default: imageviewer smooth edgedetect
+CC = g++
+CCFLAGS = -std=c++14 -Wall
 
-imageviewer: folder src/Bild.cpp src/ImageViewer.cpp
-	clang++ -o build/imageviewer src/Bild.cpp src/ImageViewer.cpp -I include -std=c++14 -Weverything -Wno-c++98-compat
+all: bin/imageviewer bin/smooth bin/edgedetect
 
-smooth: folder src/Bild.cpp src/Smooth.cpp
-	clang++ -o build/smooth src/Bild.cpp src/Smooth.cpp -I include -std=c++14 -Weverything -Wno-c++98-compat
+imageviewer: bin/imageviewer
+smooth: bin/smooth
+edgedetect: bin/edgedetect
 
-edgedetect: folder src/Bild.cpp src/EdgeDetect.cpp
-	clang++ -o build/edetect src/Bild.cpp src/EdgeDetect.cpp -I include -std=c++14 -Weverything -Wno-c++98-compat
+%.o: src/%.cpp include/bild.hpp
+	@mkdir -p $(@D)
+	$(CC) -Iinclude -c $< -o $@ $(CCFLAGS)
 
-folder:
-	mkdir -p build
+bin/%: %.o bild.o
+	@mkdir -p $(@D)
+	$(CC) $^ -o $@
 
 clean:
-	rm -rf build
+	@rm -rf bin 

src/bild.cpp

@@ -1,4 +1,4 @@
-#include "Bild.hpp"
+#include "bild.hpp"
 
 #include <iostream>
 #include <sstream>

src/edgedetect.cpp

@@ -2,7 +2,7 @@
  * Reads a PGM file and performs edge detection, then writes the result to disk
  */
 #include <iostream>
-#include "Bild.hpp"
+#include "bild.hpp"
 
 int main(int argc, char** argv)
 {

src/imageviewer.cpp

@@ -2,7 +2,7 @@
  * Displays a given PGM image in the console using ASCII characters
  */
 #include <iostream>
-#include "Bild.hpp"
+#include "bild.hpp"
 
 int main(int argc, char** argv)
 {

src/smooth.cpp

@@ -2,7 +2,7 @@
  * Reads a PGM image and smooths it by some amount, then writes it back to disk
  */
 #include <iostream>
-#include "Bild.hpp"
+#include "bild.hpp"
 
 int main(int argc, char** argv)
 {