fix mac build mbedtls, add option for ca cert

CMake/Dependencies/libkvsCommonLws-CMakeLists.txt

@@ -6,10 +6,12 @@ include(ExternalProject)
 
 ExternalProject_Add(libkvsCommonLws-download
     GIT_REPOSITORY    https://github.com/awslabs/amazon-kinesis-video-streams-producer-c.git
-    GIT_TAG           v1.5.2
+    GIT_TAG           link-mbedtls-properly
     PREFIX            ${CMAKE_CURRENT_BINARY_DIR}/build
+    LIST_SEPARATOR    |
     CMAKE_ARGS        
       -DCMAKE_INSTALL_PREFIX=${OPEN_SRC_INSTALL_PREFIX}
+      -DCMAKE_PREFIX_PATH=${OPEN_SRC_INSTALL_PREFIX}
       -DBUILD_COMMON_LWS=ON
       -DBUILD_COMMON_CURL=OFF
       -DBUILD_DEPENDENCIES=FALSE

CMake/Dependencies/libwebsockets-CMakeLists.txt

@@ -53,6 +53,8 @@ ExternalProject_Add(project_libwebsockets
         -DLWS_WITH_STATIC=1
         -DLWS_WITH_SHARED=${LWS_WITH_SHARED}
         -DLWS_WITH_MBEDTLS=${LWS_WITH_MBEDTLS}
+        -DLWS_MBEDTLS_LIBRARIES=${LWS_MBEDTLS_LIBRARIES}
+        -DLWS_MBEDTLS_INCLUDE_DIRS=${LWS_MBEDTLS_INCLUDE_DIRS}
         -DLWS_WITH_MINIMAL_EXAMPLES=1
         -DLWS_HAVE_PTHREAD_H=1 
         -DLWS_WITH_THREADPOOL=${LWS_WITH_THREADPOOL}

CMakeLists.txt

@@ -102,7 +102,11 @@ message(STATUS "Kinesis Video WebRTC Client path is ${KINESIS_VIDEO_WEBRTC_CLIEN
 message(STATUS "dependencies install path is ${OPEN_SRC_INSTALL_PREFIX}")
 
 # pass ca cert location to sdk
-add_definitions(-DKVS_CA_CERT_PATH="${CMAKE_SOURCE_DIR}/certs/cert.pem")
+
+if(NOT DEFINED KVS_CA_CERT_PATH)
+  add_definitions(-DKVS_CA_CERT_PATH="${CMAKE_SOURCE_DIR}/certs/cert.pem")
+endif()
+
 add_definitions(-DCMAKE_DETECTED_CACERT_PATH)
 
 if (ENABLE_KVS_THREADPOOL)
@@ -163,6 +167,17 @@ if(BUILD_DEPENDENCIES)
       build_dependency(mbedtls ${BUILD_ARGS})
   endif()
 
+  # This step is necessary because the next set of dependencies have a dependency on
+  # mbedtls/openssl and the find_package command  populates certain cmake variables which
+  # are needed to pass to the cmake commands for the next set of dependencies
+  if (USE_OPENSSL)
+    find_package(OpenSSL REQUIRED)
+    set(OPEN_SRC_INCLUDE_DIRS ${OPEN_SRC_INCLUDE_DIRS} ${OPENSSL_INCLUDE_DIR})
+  else()
+    find_package(MbedTLS REQUIRED)
+    set(OPEN_SRC_INCLUDE_DIRS ${OPEN_SRC_INCLUDE_DIRS} ${MBEDTLS_INCLUDE_DIRS})
+    string(REPLACE ";" "|" MBEDTLS_LIBRARIES_ALT_SEP "${MBEDTLS_LIBRARIES}")
+  endif()
 
   if(WIN32)
     set(OPENSSL_INCLUDE_DIRS "${OPEN_SRC_INSTALL_PREFIX}/include/")
@@ -188,6 +203,8 @@ if(BUILD_DEPENDENCIES)
                   -DLWS_OPENSSL_CRYPTO_LIBRARY=${OPENSSL_CRYPTO_LIBRARY}
                   -DLWS_OPENSSL_SSL_LIBRARY=${OPENSSL_SSL_LIBRARY}
                   -DLWS_OPENSSL_INCLUDE_DIRS=${OPENSSL_INCLUDE_DIR}
+                  -DLWS_MBEDTLS_INCLUDE_DIRS=${MBEDTLS_INCLUDE_DIRS}
+                  -DLWS_MBEDTLS_LIBRARIES=${MBEDTLS_LIBRARIES_ALT_SEP}
                   -DCMAKE_C_FLAGS=${CMAKE_C_FLAGS})
   endif()
   build_dependency(websockets ${BUILD_ARGS})