fix

cmake/compiler/gcc/settings.cmake

@@ -20,6 +20,14 @@ target_compile_definitions(trinity-compile-option-interface
   INTERFACE
     -DHAVE_SSE2
     -D__SSE2__)
+
+# Player-facing module messages are stored in the repository as UTF-8.
+# Keep their byte representation deterministic even when the build host uses
+# a different system locale.
+target_compile_options(trinity-compile-option-interface
+  INTERFACE
+    -finput-charset=UTF-8
+    -fexec-charset=UTF-8)
 message(STATUS "GCC: SFMT enabled, SSE2 flags forced")
 
 if( WITH_WARNINGS )