From 38bffb7f99d9f0c8dc2a784edc3aa4af96a5a2ae Mon Sep 17 00:00:00 2001
From: Jon Shallow <supjps-libcoap@jpshallow.com>
Date: Mon, 13 Dec 2021 10:04:49 +0000
Subject: [PATCH] configure.ac: Fix have mbedtls lib, but no mbedtls-dev issue

Do not make it a hard error if mbedtls library exists, but the mbedtls
development environment is missing.

Just remove mbedtls support if this is the case.
---
 configure.ac | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 918ccddc..ea4b2d97 100644
--- a/configure.ac
+++ b/configure.ac
@@ -415,7 +415,8 @@ if test "x$build_dtls" = "xyes"; then
                        return 0;
                      }]])],
                [mbedtls_version=$(./conftest$EXEEXT)],
-               [AC_MSG_ERROR(Failed to determine Mbed TLS version)])
+               [AC_MSG_WARN(Failed to determine Mbed TLS version)
+                have_mbedtls=no])
             LIBS=$local_MbedTLS_save_LIBS
             AC_LANG_POP(C)
         fi