Makefile, config.mk: use pkg-config, fix config.h rule + tweaks

Makefile

@@ -9,7 +9,7 @@ include config.mk
 
 BIN = ${NAME}-${LAYOUT}
 SRC = drw.c ${NAME}.c util.c
-OBJ = ${NAME}-${LAYOUT}.o
+OBJ = ${SRC:.c=.o}
 MAN1 = ${NAME}.1
 
 all: ${BIN}
@@ -24,11 +24,16 @@ options:
 config.h:
 	cp config.def.h $@
 
-${BIN}:
-	${CC} -o $@ ${SRC} ${SVKBD_CFLAGS} ${SVKBD_CPPFLAGS} ${SVKBD_LDFLAGS}
+.c.o:
+	${CC} ${SVKBD_CFLAGS} ${SVKBD_CPPFLAGS} -c $<
+
+${OBJ}: config.h config.mk
+
+${BIN}: ${OBJ}
+	${CC} -o ${BIN} ${OBJ} ${SVKBD_LDFLAGS}
 
 clean:
-	rm -f ${NAME}-?? ${NAME}-??.o ${OBJ}
+	rm -f ${NAME}-?? ${NAME}-??.o ${OBJ} ${BIN}
 
 dist:
 	rm -rf "${NAME}-${VERSION}"

config.mk

@@ -7,15 +7,21 @@ MANPREFIX = ${PREFIX}/share/man
 X11INC = /usr/X11R6/include
 X11LIB = /usr/X11R6/lib
 
+PKG_CONFIG = pkg-config
+
 # Xinerama, comment if you don't want it
 XINERAMALIBS = -L${X11LIB} -lXinerama
 XINERAMAFLAGS = -DXINERAMA
 
 # includes and libs
-INCS = -I. -I./layouts -I${X11INC} -I/usr/include/freetype2
-LIBS = -L${X11LIB} -lX11 -lXtst -lfontconfig -lXft ${XINERAMALIBS}
+INCS = -I. -I./layouts -I${X11INC} \
+	`$(PKG_CONFIG) --cflags fontconfig` \
+	`$(PKG_CONFIG) --cflags freetype2`
+LIBS = -L${X11LIB} -lX11 -lXtst -lXft ${XINERAMALIBS} \
+	`$(PKG_CONFIG) --libs fontconfig` \
+	`$(PKG_CONFIG) --libs freetype2`
 
 # use system flags
-SVKBD_CFLAGS = ${CFLAGS}
+SVKBD_CFLAGS = ${CFLAGS} ${INCS}
 SVKBD_LDFLAGS = ${LDFLAGS} ${LIBS}
-SVKBD_CPPFLAGS = ${CPPFLAGS} ${INCS} -DVERSION=\"VERSION\" ${XINERAMAFLAGS} -DLAYOUT=\"layout.${LAYOUT}.h\"
+SVKBD_CPPFLAGS = ${CPPFLAGS} -DVERSION=\"VERSION\" ${XINERAMAFLAGS} -DLAYOUT=\"layout.${LAYOUT}.h\"