Make parallel builds work

There is no need to execute glib-ginterface-gen.py twice because it
generates both the .c and .h files in one shot. Therefore, merely
having one of them (say the .c) depend on the other (say the .h) is
enough.

Moreover, running it twice breaks parallel builds because one
glib-ginterface-gen.py process steps on the other.

Based on a suggestion from Ryan Lortie.

Fixes: https://bugzilla.gnome.org/688132

diff --git a/extensions/Makefile.am b/extensions/Makefile.am
index bc4213309def14c1dcbec7918b69d75fe0c11de0..65f2f5e01aa0ee3aafdbd9c1cefac9c5a3670da4 100644 (file)
--- a/extensions/Makefile.am
+++ b/extensions/Makefile.am
@@ -108,7 +108,17 @@ _gen/cli-misc-body.h _gen/cli-misc.h: _gen/misc.xml \
                --tp-proxy-api=0.10.0 \
                $< Emp_Cli _gen/cli-misc
 
-_gen/svc-misc.c _gen/svc-misc.h: _gen/misc.xml \
+# There is no need to execute glib-ginterface-gen.py twice because it
+# generates both the .c and .h files in one shot. Therefore, merely
+# having one of them (say the .c) depend on the other (say the .h) is
+# enough.
+#
+# Moreover, running it twice breaks parallel builds because one
+# glib-ginterface-gen.py process steps on the other.
+
+_gen/svc-misc.c: _gen/svc-misc.h
+
+_gen/svc-misc.h: _gen/misc.xml \
        $(tools_dir)/glib-ginterface-gen.py
        $(AM_V_GEN)$(PYTHON) $(tools_dir)/glib-ginterface-gen.py \
                --filename=_gen/svc-misc \