我使用ndk_build生成存储在项目目录中的pjsip_lib文件夹中的静态库。 android.mk文件存在于jni文件夹中，如下所示：
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := libpj-arm-unknown-linux-androideabi
LOCAL_SRC_FILES := ../pjsip_lib/libpj-arm-unknown-linux-androideabi.a
include $(PREBUILT_STATIC_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := libpjlib-util-arm-unknown-linux-androideabi
LOCAL_SRC_FILES := ../pjsip_lib/libpjlib-util-arm-unknown-linux-androideabi.a
include $(PREBUILT_STATIC_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := libpjmedia-arm-unknown-linux-androideabi
LOCAL_SRC_FILES := ../pjsip_lib/libpjmedia-arm-unknown-linux-androideabi.a
include $(PREBUILT_STATIC_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := libpjmedia-audiodev-arm-unknown-linux-androideabi
LOCAL_SRC_FILES := ../pjsip_lib/libpjmedia-audiodev-arm-unknown-linux-androideabi.a
include $(PREBUILT_STATIC_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := libpjmedia-codec-arm-unknown-linux-androideabi
LOCAL_SRC_FILES := ../pjsip_lib/libpjmedia-codec-arm-unknown-linux-androideabi.a
include $(PREBUILT_STATIC_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := libpjmedia-videodev-arm-unknown-linux-androideabi
LOCAL_SRC_FILES := ../pjsip_lib/libpjmedia-videodev-arm-unknown-linux-androideabi.a
include $(PREBUILT_STATIC_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := libpjnath-arm-unknown-linux-androideabi
LOCAL_SRC_FILES := ../pjsip_lib/libpjnath-arm-unknown-linux-androideabi.a
include $(PREBUILT_STATIC_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := libpjsdp-arm-unknown-linux-androideabi
LOCAL_SRC_FILES := ../pjsip_lib/libpjsdp-arm-unknown-linux-androideabi.a
include $(PREBUILT_STATIC_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := libpjsip-arm-unknown-linux-androideabi
LOCAL_SRC_FILES := ../pjsip_lib/libpjsip-arm-unknown-linux-androideabi.a
include $(PREBUILT_STATIC_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := libpjsip-simple-arm-unknown-linux-androideabi
LOCAL_SRC_FILES := ../pjsip_lib/libpjsip-simple-arm-unknown-linux-androideabi.a
include $(PREBUILT_STATIC_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := libpjsip-ua-arm-unknown-linux-androideabi
LOCAL_SRC_FILES := ../pjsip_lib/libpjsip-ua-arm-unknown-linux-androideabi.a
include $(PREBUILT_STATIC_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := libpjsua2-arm-unknown-linux-androideabi
LOCAL_SRC_FILES := ../pjsip_lib/libpjsua2-arm-unknown-linux-androideabi.a
include $(PREBUILT_STATIC_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := libpjsua-arm-unknown-linux-androideabi
LOCAL_SRC_FILES := ../pjsip_lib/libpjsua-arm-unknown-linux-androideabi.a
include $(PREBUILT_STATIC_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := dummy_pjsip_jni_module
LOCAL_SRC_FILES := com_example_voiper_NativeFunction.c
#LOCAL_LDLIBS += -lpj-arm-unknown-linux-androideabi -lpjlib-util-arm-unknown-linux-androideabi -lpjmedia-arm-unknown-linux-androideabi -lpjmedia-audiodev-arm-unknown-linux-androideabi -lpjmedia-codec-arm-unknown-linux-androideabi -lpjmedia-videodev-arm-unknown-linux-androideabi -lpjnath-arm-unknown-linux-androideabi -lpjsdp-arm-unknown-linux-androideabi -lpjsip-arm-unknown-linux-androideabi -lpjsip-simple-arm-unknown-linux-androideabi -lpjsip-ua-arm-unknown-linux-androideabi -lpjsua2-arm-unknown-linux-androideabi -lpjsua-arm-unknown-linux-androideabi
LOCAL_EXPORT_C_INCLUDES += $(LOCAL_PATH)/include
LOCAL_C_INCLUDES += $(LOCAL_PATH)/include
LOCAL_STATIC_LIBRARIES := libpj-arm-unknown-linux-androideabi libpjlib-util-arm-unknown-linux-androideabi libpjmedia-arm-unknown-linux-androideabi libpjmedia-audiodev-arm-unknown-linux-androideabi libpjmedia-codec-arm-unknown-linux-androideabi libpjmedia-videodev-arm-unknown-linux-androideabi libpjnath-arm-unknown-linux-androideabi libpjsdp-arm-unknown-linux-androideabi libpjsip-arm-unknown-linux-androideabi libpjsip-simple-arm-unknown-linux-androideabi libpjsip-ua-arm-unknown-linux-androideabi libpjsua2-arm-unknown-linux-androideabi libpjsua-arm-unknown-linux-androideabi
LOCAL_SHARED_LIBRARIES +=
include $(BUILD_SHARED_LIBRARY)
正如我们目前所见，只有一个c文件的内容如下：
JNIEXPORT jint JNICALL Java_com_example_voiper_NativeFunction_jniTest(JNIEnv* env, jobject thiz)
{
app_init();
return 30;
}
pj_str_t getLogFileName()
{
char *name = "./pj_log.txt";
return pj_str(name);
}
static pj_status_t app_init(void)
{
pjsua_config ua_cfg;
pjsua_logging_config log_cfg;
pjsua_media_config media_cfg;
pj_status_t status;
getLogFileName();
//pjsua_create();
}
如果我取消注释pjsua_create调用，那么有很多未定义的引用..当我尝试执行ndk-build时所有错误..我在执行ndk-build时另外添加APP_PLATFORM = android-9 ..错误示例：
in function pjsua_call_on_tsx_state_changed:pjsua_call.c(.text+0xb9d8): error: undefined reference to 'pjsip_tsx_send_msg'
为什么会这样？任何指针/解释？
编辑2：
根据建议，我更改了库的导入顺序（基于make install生成的pkgconfig）：
LOCAL_STATIC_LIBRARIES := pjsua pjsip-ua pjsip-simple pjsip pjmedia-codec pjmedia pjmedia-videodev pjmedia-audiodev pjnath pjlib-util milenage srtp resample gsm-codec speex ilbc-codec g7221-codec pj
错误数量已减少，仅来自libpjmedia-audiodev库。错误的一个例子：
ANDROID_NDK_HOME/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: jni/../pjsip_lib/libpjmedia-audiodev-arm-unknown-linux-androideabi.a(opensl_dev.o): in function opensl_create_stream:opensl_dev.c(.text+0x1a2c): error: undefined reference to 'SL_IID_RECORD'
我尝试使用pkgconfig进行交叉编译（请参阅http://trac.pjsip.org/repos/wiki/Getting_Started_Using上的第一个make文件）但是又有问题..
编辑3：
在编辑2中提到的订单更改后，我在ndk-build期间得到了不同的错误，对于两种情况，一种是APP_PLATFORM = android-10，另一种是APP_PLATFORM = android-9
如果是10，一些非常基本的功能（以及prev错误）会出现错误，例如：
error: undefined reference to 'malloc
error: undefined reference to 'srand48'
error: undefined reference to 'ioctl'
ANDROID_NDK_HOME/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: ANDROID_NDK_HOME/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.6/libgcc.a(pr-support.o): in function _Unwind_GetTextRelBase:/s/ndk-toolchain/src/build/../gcc/gcc-4.6/libgcc/../gcc/config/arm/pr-support.c:400: error: undefined reference to 'abort'
FIX：
将OpenSLES添加到LOCAL_LDLIBS ..