So CC="ccache gcc" works properly.
gir_sources+=$(patsubst %,$(builddir)/%, $(built_source_make))
Gst-@GST_API_VERSION@.gir: $(INTROSPECTION_SCANNER) libgstreamer-@GST_API_VERSION@.la
- $(AM_V_GEN)GST_PLUGIN_SYSTEM_PATH_1_0="" GST_PLUGIN_PATH_1_0="" GST_REGISTRY_UPDATE=no GI_SCANNER_DISABLE_CACHE=yes CC=$(CC) \
+ $(AM_V_GEN)GST_PLUGIN_SYSTEM_PATH_1_0="" GST_PLUGIN_PATH_1_0="" GST_REGISTRY_UPDATE=no GI_SCANNER_DISABLE_CACHE=yes CC="$(CC)" \
$(INTROSPECTION_SCANNER) -v --namespace Gst \
--nsversion=@GST_API_VERSION@ \
--verbose \