--- setserial-2.17.orig/configure	2000-01-27 16:03:36.000000000 +0100
+++ setserial-2.17/configure	2026-05-14 04:06:22.731172045 +0200
@@ -689,7 +689,7 @@ cat > conftest.$ac_ext << EOF
 #line 690 "configure"
 #include "confdefs.h"
 
-main(){return(0);}
+int main(){return(0);}
 EOF
 if { (eval echo configure:695: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   ac_cv_prog_cc_works=yes
