fix #40678 (Cross compilation fails)

diff --git a/ext/posix/config.m4 b/ext/posix/config.m4
index f84facde60b1ffc61827842b0bfe6b32692bc269..f88e2615ff4c2a038d7ed8cdcf5a8262ec54cc1c 100644 (file)
--- a/ext/posix/config.m4
+++ b/ext/posix/config.m4
@@ -28,5 +28,7 @@ int main(int argc, char *argv[])
     AC_DEFINE(HAVE_TTYNAME_R, 1, [Whether you have a working ttyname_r])
   ],[
     AC_MSG_RESULT([no, posix_ttyname() will be thread-unsafe])
+  ], [
+    AC_MSG_RESULT([no, cannot detect working ttyname_r() when cross compiling. posix_ttyname() will be thread-unsafe])
   ])
 fi