From 0a1c40b36508b7848c0359bd5f5297b5e0e0c2d3 Mon Sep 17 00:00:00 2001
From: Andrew Hutchings <andrew@wolfssl.com>
Date: Wed, 11 Feb 2026 15:20:31 +0000
Subject: [PATCH] Don't allow `--enable-selftest` with empty file

It probably won't compile anyway.
---
 configure.ac | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/configure.ac b/configure.ac
index ed7a512a47..c0592812c9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -6602,6 +6602,9 @@ AS_CASE([$ENABLED_SELFTEST],
         SELFTEST_VERSION="v1"
     ])
 
+AS_IF([test "x$ENABLED_SELFTEST" = "xyes" && test ! -s "${srcdir}/wolfcrypt/src/selftest.c"],
+    [AC_MSG_ERROR([selftest.c is missing, --enable-selftest requires the CAVP selftest source])])
+
 AS_CASE([$SELFTEST_VERSION],
     ["v2"],[
         AM_CFLAGS="$AM_CFLAGS -DHAVE_SELFTEST -DHAVE_SELFTEST_VERSION=2 -DHAVE_PUBLIC_FFDHE"