--- configure.ac.orig	2022-09-02 11:42:24 UTC
+++ configure.ac
@@ -918,7 +918,7 @@ case $host in
     #AC_SUBST(OS_MACOS)
     ;;
 
-    *-freebsd1*)
+    *freebsd*)
     AC_MSG_RESULT([FreeBSD-1x])
     ADDITIONAL_CFLAGS="-D_GNU_SOURCE"
     ;;