curl 问题

Cocos2d-x
#1

环境信息：

Andriod Studio 3.0.1
APILevel 19
NDK   android-ndk-r14b
cocos2dx  cocos2d-x-3.16

报错信息：

error: undefined reference to 'curl_easy_setopt'
error: undefined reference to 'curl_easy_init'
error: undefined reference to 'curl_easy_cleanup'
error: undefined reference to 'curl_slist_free_all'
error: undefined reference to 'curl_slist_append'
error: undefined reference to 'curl_easy_perform'
error: undefined reference to 'curl_easy_getinfo'
error: undefined reference to 'curl_easy_strerror'
error: undefined reference to 'curl_formadd'
error: undefined reference to 'curl_formadd'
cpp:420: error: undefined reference to 'curl_formfree'
collect2.exe: error: ld returned 1 exit status

已将
cocos2d/cocos/Android.mk

$(call import-module,recast)
#$(call import-module,curl/prebuilt/android)
$(call import-module,websockets/prebuilt/android)

改为了

$(call import-module,recast)
$(call import-module,curl/prebuilt/android)
$(call import-module,websockets/prebuilt/android)

还是出错，看有人说是APILevel 有问题，请问那个Level 是OK的啊？
哪位给指点下，谢谢。