diff -durN desmume-release_0_9_13.orig/desmume/src/commandline.cpp desmume-release_0_9_13/desmume/src/commandline.cpp

--- desmume-release_0_9_13.orig/desmume/src/commandline.cpp	2022-05-23 06:37:41.000000000 +0200

+++ desmume-release_0_9_13/desmume/src/commandline.cpp	2022-06-18 18:40:49.218922840 +0200

@@ -31,7 +31,7 @@

 #include <compat/getopt.h>

 //#include "frontend/modules/mGetOpt.h" //to test with this, make sure global `optind` is initialized to 1

-#define printerror(...) fprintf(stderr, __VA_ARGS__)

+#define printerror(...) fprintf(stderr, "%s", __VA_ARGS__)

 int _scanline_filter_a = 0, _scanline_filter_b = 2, _scanline_filter_c = 2, _scanline_filter_d = 4;

 int _commandline_linux_nojoy = 0;

@@ -397,7 +397,7 @@

 	if(opt_help)

 	{

-		printf(help_string);

+		printf("%s", help_string);

 		exit(1);

 	}