Restructured repository and rewrote Makefile

.gitignore

@@ -0,0 +1,2 @@
+*~
+build

src/.gitignore

@@ -1,4 +0,0 @@
-*
-!.gitignore
-!*.c
-!Makefile

src/Makefile

@@ -1,17 +1,22 @@
-CC= gcc
-SRCFILES= cat.c touch.c yes.c mkdir.c echo.c ls.c
-OBJFILES= cat touch yes mkdir echo ls
-CFLAGS= -Wall -Wextra
+CC=cc
+BUILDDIR=../build
+TESTSDIR=../tests
 
-.PHONY: all clean
+CFLAGS=-Wall -Wextra 
 
-all:	
-	$(CC) $(CFLAGS) cat.c -o cat	
-	$(CC) $(CFLAGS) touch.c -o touch
-	$(CC) $(CFLAGS) yes.c -o yes
-	$(CC) $(CFLAGS) mkdir.c -o mkdir
-	$(CC) $(CFLAGS) echo.c -o echo
-	$(CC) $(CFLAGS) ls.c -o ls
+CFILES=$(wildcard *.c)
+OFILES=$(patsubst %.c, $(BUILDDIR)/%.o, $(CFILES))
+
+.PHONY: all clean test 
+.SUFFIXES: .o .c
+
+all: $(BUILDDIR) $(OFILES)
+
+$(BUILDDIR):
+	mkdir -p $(BUILDDIR)
+
+$(BUILDDIR)/%.o: %.c 
+	$(CC) $(CFLAGS) $< -o $@ 
 
 clean:
-	@rm ${OBJFILES}
+	rm -rf $(BUILDDIR)