diff -ur pmx-3.0.0/libf2c/main.c pmx-src/libf2c/main.c
--- pmx-3.0.0/libf2c/main.c	Sat Feb 11 06:51:05 2023
+++ pmx-src/libf2c/main.c	Mon Feb 13 10:05:04 2023
@@ -106,7 +106,7 @@
 #ifdef KR_headers
 main(argc, argv) int argc; char **argv;
 #else
-main(int argc, char **argv)
+int main(int argc, char **argv)
 #endif
 {
 xargc = argc;
