From 40a76e1d4a1f46de064c28e1f32673ecd5e4cb0e Mon Sep 17 00:00:00 2001
From: Werner Almesberger <werner@almesberger.net>
Date: Tue, 17 Apr 2012 17:14:24 -0300
Subject: [PATCH] genex/Makefile: add dependency generation (.d method)

Straight from fped/Makefile
---
 genex/Makefile | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/genex/Makefile b/genex/Makefile
index 8a183ca..7077e17 100644
--- a/genex/Makefile
+++ b/genex/Makefile
@@ -9,9 +9,11 @@
 # (at your option) any later version.
 #
 
-CFLAGS = -Wall -g
 OBJS = genex.o comp.o libs.o pdf.o
 
+SHELL = /bin/bash
+CFLAGS = -Wall -g
+
 CC_normal	:= $(CC)
 DEPEND_normal	:= $(CPP) $(CFLAGS) -MM -MG
 
@@ -36,8 +38,18 @@ all:		genex
 genex:		$(OBJS)
 		$(CC) $(CFLAGS) -o $@ $(OBJS) $(LDLIBS)
 
+%.o:		%.c
+		$(CC) -c $(CFLAGS) $*.c -o $*.o
+		$(DEPEND) $*.c | \
+		  sed -e \
+		    '/^\(.*:\)\? */{p;s///;s/ *\\\?$$/ /;s/  */:\n/g;H;}' \
+		    -e '$${g;p;}' -e d >$*.d; \
+		  [ "$${PIPESTATUS[*]}" = "0 0" ] || { rm -f $*.d; exit 1; }
+
+-include $(OBJS:.o=.d)
+
 clean:
-		rm -f $(OBJS)
+		rm -f $(OBJS) $(OBJS:.o=.d)
 
 spotless:	clean
 		rm -f genex