Makefile improvements

- fix: rebuild on source change.
- allow to override dependency flag per tool (the ones that have deps).
- rebuild on config.mk or headers change.

1 files changed, 14 insertions, 0 deletions

diff --git a/config.mk b/config.mk
index 4ecba54..5fde97e 100644
--- a/config.mk
+++ b/config.mk
@@ -23,3 +23,17 @@ LDFLAGS  = -s ${LIBS}
 
 # compiler and linker
 CC = cc
+
+# flags per tool.
+
+png2ff-CFLAGS := -I${PNGINC}
+png2ff-LDFLAGS := -L${PNGLIB} -lpng
+
+ff2png-CFLAGS := -I${PNGINC}
+ff2png-LDFLAGS := -L${PNGLIB} -lpng
+
+jpg2ff-CFLAGS := -I${JPGINC}
+jpg2ff-LDFLAGS := -L${JPGLIB} -ljpeg
+
+ff2jpg-CFLAGS := -I${JPGINC}
+ff2jpg-LDFLAGS := -L${JPGLIB} -ljpeg