Also include the "config.h" file in the generated sources
like "nm-enum-types.c".
$(1).c.stamp: $(_glib_enum_types_h_sources) Makefile
$$(_GLIB_V_GEN) $$(GLIB_MKENUMS) \
- --fhead "/* Generated by glib-mkenums. Do not edit */\n\n#include \"$(notdir $(1)).h\"\n" \
+ --fhead "/* Generated by glib-mkenums. Do not edit */\n\n#include \"config.h\"\n\n#include \"$(notdir $(1)).h\"\n" \
$$(GLIB_MKENUMS_C_FLAGS) \
$$($(_glib_enum_types_prefix)_MKENUMS_C_FLAGS) \
--fhead "$$(foreach f,$$(filter-out Makefile,$$(^F)),\n#include \"$$(f)\")\n\n" \