Shared libdrm work:

- create libdrm.so target
- build it by default
- drop xf86drmCompat.c from the build
- make 'clean' target never fail
- use pattern rules for .c -> .o for parallelism
- add 'install' target

libdrm/Makefile

@@ -1,12 +1,22 @@
-SOURCES = xf86drm.c  xf86drmCompat.c xf86drmHash.c xf86drmRandom.c xf86drmSL.c
-OBJECTS = xf86drm.o  xf86drmCompat.o xf86drmHash.o xf86drmRandom.o xf86drmSL.o
+SOURCES = xf86drm.c xf86drmHash.c xf86drmRandom.c xf86drmSL.c
+OBJECTS = xf86drm.o xf86drmHash.o xf86drmRandom.o xf86drmSL.o
+
+CFLAGS ?= -O2 -fPIC -g
+
+all: libdrm.so
 
 libxf86drm.a:	$(OBJECTS)	
 	ar rc $@ $+
 	ranlib $@
 
-$(OBJECTS):	$(SOURCES)
-	$(CC) $(CFLAGS) -c -I../shared -I../linux $+
+libdrm.so: $(OBJECTS)
+	$(CC) -shared -Wl,-hlibdrm.so.1 -o $@ $^
+
+.c.o:
+	$(CC) $(CFLAGS) -c -I../shared -I../linux $<
 
 clean:
-	rm *.a *.o
+	rm -f *.a *.o *.so
+
+install: libdrm.so
+	install -m 755 libdrm.so /lib