From 0c34c42043caf698ee2eee8b7bf631639ebf1181 Mon Sep 17 00:00:00 2001
From: Robert Lubos <Robert.Lubos@nordicsemi.no>
Date: Tue, 17 Mar 2020 18:03:06 +0100
Subject: [PATCH] [cmake] fix build with external mbedTLS (#4696)

`mbedcrypto` target is only available when `OT_BUILTIN_MBEDTLS` is set,
therefore linking it unconditionally when external mbed TLS instance is
used results in a linking error.

Signed-off-by: Robert Lubos <robert.lubos@nordicsemi.no>
---
 src/core/CMakeLists.txt | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/src/core/CMakeLists.txt b/src/core/CMakeLists.txt
index 36281395a..bd4537d31 100644
--- a/src/core/CMakeLists.txt
+++ b/src/core/CMakeLists.txt
@@ -233,12 +233,14 @@ target_sources(openthread-radio PRIVATE
     utils/parse_cmdline.cpp
 )
 
-target_link_libraries(openthread-ftd
-    PUBLIC
-        mbedcrypto
-)
+if(OT_BUILTIN_MBEDTLS)
+    target_link_libraries(openthread-ftd
+        PUBLIC
+            mbedcrypto
+    )
 
-target_link_libraries(openthread-mtd
-    PUBLIC
-        mbedcrypto
-)
+    target_link_libraries(openthread-mtd
+        PUBLIC
+            mbedcrypto
+    )
+endif()