Add -MQ to compilation flags to make dependency files work properly

Looks like ccache’s own header dependencies have been broken since
4aa357782e48 and nobody noticed.

(cherry picked from commit a00b59c86136488d54a83bef10bc5a0f6b37eacf)

diff --git a/dev.mk.in b/dev.mk.in
index e2659c51023efec5118f54c0c4415adfa029d23f..e50d59fb078192521ec29885d27829ac47dc6255 100644 (file)
--- a/dev.mk.in
+++ b/dev.mk.in
@@ -1,7 +1,7 @@
 # GNU make syntax reigns in this file.
 
 all_cflags += -Werror
-all_cppflags += -MD -MP -MF .deps/$(subst .._,,$(subst /,_,$(subst $(srcdir)/,,$<))).d
+all_cppflags += -MD -MP -MF .deps/$(subst .._,,$(subst /,_,$(subst $(srcdir)/,,$<))).d -MQ $@
 all_cxxflags += -Werror
 
 A2X = a2x