meson: Don't use add_global_arguments when a subproject

This is the correct fix for https://gitlab.freedesktop.org/gstreamer/gst-build/-/merge_requests/236

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-build/-/merge_requests/259>

diff --git a/meson.build b/meson.build
index 04ec9a9..303dba1 100644 (file)
--- a/meson.build
+++ b/meson.build
@@ -59,8 +59,10 @@ if not meson.is_subproject() and cc.get_id() == 'msvc'
   endif
 endif
 
-# Ensure that MSVC interprets all source code as UTF-8
-if cc.get_id() == 'msvc'
+# Ensure that MSVC interprets all source code as UTF-8. Only do this when we're
+# not a subproject, because subprojects are not allowed to call
+# add_global_arguments().
+if not meson.is_subproject() and cc.get_id() == 'msvc'
   add_global_arguments(
       cc.get_supported_arguments(['/utf-8']), # set the input encoding to utf-8
       language: ['c', 'cpp'])