Improve build instruction to avoid rebuilding stuff when there has been no change.

diff --git a/Makefile.am b/Makefile.am
index c4f1911f213b60d0db9ad814a7547b46d4428a68..7106f35a3489cbdb49a92243c12b135ea9300d0c 100644 (file)
--- a/Makefile.am
+++ b/Makefile.am
@@ -114,9 +114,10 @@ noinst_HEADERS += $(BUILT_SOURCES)
 # Correctly clean the generated headers, but keep the xml description
 CLEANFILES += $(BUILT_SOURCES)
 
-dbus-interface.h dbus-interface.c:  org.gnome.ShairportSync.xml
+dbus-interface.c:  org.gnome.ShairportSync.xml
        gdbus-codegen --interface-prefix org.gnome --generate-c-code dbus-interface org.gnome.ShairportSync.xml
 dbus-interface.h: dbus-interface.c
+       touch dbus-interface.h
 endif
 
 if USE_MPRIS
@@ -130,9 +131,10 @@ noinst_HEADERS += $(BUILT_SOURCES)
 # Correctly clean the generated headers, but keep the xml description
 CLEANFILES += $(BUILT_SOURCES)
 
-mpris-interface.h mpris-interface.c:  org.mpris.MediaPlayer2.xml
+mpris-interface.c:  org.mpris.MediaPlayer2.xml
        gdbus-codegen --interface-prefix org.mpris --generate-c-code mpris-interface org.mpris.MediaPlayer2.xml
 mpris-interface.h: mpris-interface.c
+       touch mpris-interface.h
 endif
 
 noinst_PROGRAMS =