Add libcvc dep

Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>

picokeys_sdk_import.cmake

@@ -356,6 +356,16 @@ if(NOT ESP_PLATFORM)
         add_library(mbedtls STATIC ${MBEDTLS_SOURCES})
         target_include_directories(mbedtls SYSTEM PUBLIC ${CMAKE_CURRENT_LIST_DIR}/third-party/mbedtls/include)
     endif()
+    if(ENABLE_LIBCVC)
+        if(EXISTS "${LIBCVC_PATH}/CMakeLists.txt")
+            if(NOT TARGET cvc)
+                add_subdirectory(${LIBCVC_PATH} ${CMAKE_BINARY_DIR}/libcvc_build)
+            endif()
+            list(APPEND LIBRARIES cvc)
+        else()
+            message(FATAL_ERROR "ENABLE_LIBCVC is ON but libcvc source is missing at ${LIBCVC_PATH}")
+        endif()
+    endif()
     if(USB_ITF_HID)
         add_library(tinycbor STATIC ${CBOR_SOURCES})
         target_include_directories(tinycbor SYSTEM PUBLIC ${CMAKE_CURRENT_LIST_DIR}/third-party/tinycbor/src)