https://github.com/snes9xgit/snes9x/pull/1033
--- a/gtk/CMakeLists.txt
+++ b/gtk/CMakeLists.txt
@@ -368,2 +368,3 @@
 target_compile_options(jma PUBLIC ${ARGS})
+target_compile_definitions(jma PRIVATE ${DEFINES})
 list(APPEND LIBS jma)