Link fastdds against unreal OpenSSL library

CMake/LinuxToolchain.cmake

@@ -74,6 +74,16 @@ set (
 	${UE_THIRD_PARTY}/Unix/LibCxx/lib/Unix/${TARGET_TRIPLE} CACHE PATH ""
 )
 
+set (
+	UE_OPENSSL_INCLUDE
+	${UE_THIRD_PARTY}/OpenSSL/1.1.1t/include/Unix/openssl CACHE PATH ""
+)
+
+set (
+	UE_OPENSSL_LIBS
+	${UE_THIRD_PARTY}/OpenSSL/1.1.1t/lib/Unix/x86_64-unknown-linux-gnu CACHE PATH ""
+)
+
 add_compile_options (
 	-fms-extensions
 	-fno-math-errno

Ros2Native/CMakeLists.txt

@@ -38,6 +38,10 @@ ExternalProject_add (
     -DTHIRDPARTY_fastcdr=FORCE
     -DTHIRDPARTY_TinyXML2=FORCE
     -DSQLITE3_SUPPORT=OFF
+    -DOPENSSL_FOUND:BOOL=ON
+    -DOPENSSL_INCLUDE_DIR:FILEPATH=${UE_OPENSSL_INCLUDE}
+    -DOPENSSL_SSL_LIBRARY:FILEPATH=${UE_OPENSSL_LIBS}/libssl.a
+    -DOPENSSL_CRYPTO_LIBRARY:FILEPATH=${UE_OPENSSL_LIBS}/libcrypto.a
   DEPENDS foonathan_memory
 )