Fix failure to link static Curl to shared producer due to no being position-independent

Author: stefankiesz

CMake/Dependencies/libkvscproducer-CMakeLists.txt

@@ -7,9 +7,11 @@ include(ExternalProject)
 # clone repo only
 ExternalProject_Add(libkvscproducer-download
 	GIT_REPOSITORY    https://github.com/awslabs/amazon-kinesis-video-streams-producer-c.git
-	GIT_TAG           v1.5.3
+	GIT_TAG           static-curl-to-shared-producer
 	SOURCE_DIR        "${CMAKE_CURRENT_BINARY_DIR}/kvscproducer-src"
 	BINARY_DIR        "${CMAKE_CURRENT_BINARY_DIR}/kvscproducer-build"
+	CMAKE_ARGS
+	  -DCURL_POSITION_INDEPENDENT_CODE=${CURL_POSITION_INDEPENDENT_CODE}
 	CONFIGURE_COMMAND ""
 	BUILD_COMMAND     ""
 	INSTALL_COMMAND   ""

CMakeLists.txt

@@ -57,6 +57,11 @@ endif()
 add_definitions(-DKVS_CA_CERT_PATH="${CMAKE_CURRENT_SOURCE_DIR}/certs/cert.pem")
 add_definitions(-DCMAKE_DETECTED_CACERT_PATH)
 
+# Instruct Producer C to build Curl with Position Independent Code (-fpic).
+# This is to allow a static Curl build to link with to a shared Producer Cpp build.
+if(BUILD_STATIC AND BUILD_FORCE_GSTREAMER_PLUGIN_SHARED)
+  set(CURL_POSITION_INDEPENDENT_CODE TRUE)
+endif()
 
 if(BUILD_DEPENDENCIES)
   if(NOT EXISTS ${KINESIS_VIDEO_OPEN_SOURCE_SRC})