Makefile.introspection: Allow usage with --header-only

diff --git a/Makefile.introspection b/Makefile.introspection
index a0764ac..228cdde 100644 (file)
--- a/Makefile.introspection
+++ b/Makefile.introspection
@@ -120,7 +120,8 @@ define introspection-scanner
 
 # Basic sanity check, to make sure required variables are set
 $(if $($(_gir_name)_FILES),,$(error Need to define $(_gir_name)_FILES))
-$(if $(or $($(_gir_name)_LIBS),
+$(if $(or $(findstring --header-only,$($(_gir_name)_SCANNERFLAGS)),
+          $($(_gir_name)_LIBS),
           $($(_gir_name)_PROGRAM)),,
     $(error Need to define $(_gir_name)_LIBS or $(_gir_name)_PROGRAM))