ndk-build gstreamer android 教程：找不到-lrt

Question

我正在关注教程 http://docs.gstreamer.com/display/GstSDK/Installing+for+Android+development

我想使用ndk-build 来构建示例。

当我使用"ndk-build" 时，出现错误消息。 以下是输出消息：

---

GStreamer      : [GEN] => gst-build/gstreamer_android.c

GStreamer      : [COMPILE] => gst-build/gstreamer_android.c

GStreamer      : [LINK] => gst-build/libgstreamer_android.so

/home/quanta/tools/android-ndk-r9d/toolchains/arm-linux-androideabi- 4.6/prebuilt/linux-x86/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld.gold: error: cannot find -lrt

collect2: ld 返回 1 个退出状态

make: *** [buildsharedlibrary] 错误 1

---

我在 ubuntu linux 64bit 12.04 中使用 ndk-r9d

非常感谢您的任何建议。

添加 Android.mk

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)

LOCAL_MODULE    := tutorial-1
LOCAL_SRC_FILES := tutorial-1.c
LOCAL_SHARED_LIBRARIES := gstreamer_android
LOCAL_LDLIBS := -llog
include $(BUILD_SHARED_LIBRARY)

ifndef GSTREAMER_SDK_ROOT
ifndef GSTREAMER_SDK_ROOT_ANDROID
$(error GSTREAMER_SDK_ROOT_ANDROID is not defined!)
endif
GSTREAMER_SDK_ROOT        := $(GSTREAMER_SDK_ROOT_ANDROID)
endif
GSTREAMER_NDK_BUILD_PATH  := $(GSTREAMER_SDK_ROOT)/share/gst-android/ndk-    build/
GSTREAMER_PLUGINS         := coreelements
include $(GSTREAMER_NDK_BUILD_PATH)/gstreamer.mk

Answer 1

LOCAL_LDLIBS := -llog

到

LOCAL_LDLIBS := -llog -landroid

Answer 2

Android 没有 librt。都在 libc 中。

大概include $(GSTREAMER_NDK_BUILD_PATH)/gstreamer.mk 正在将-lrt 添加到ldlibs。