的Android NDK失敗，libutils.so：未定義的引用`__pthread_gettid」

Question

我儘量讓我有一個本地共享庫的Android應用程序，但我得到以下錯誤：

Debug//local/arm64-v8a/libutils.so: undefined reference to `__pthread_gettid' clang++: error: linker command failed with exit code 1 (use -v to see invocation) 

我使用的Android NDK R13B。在我的makefile有：

Application.mk

..... 
APP_PLATFORM := android-19 
APP_ABI := arm64-v8a 
..... 

Android.mk

..... 
include $(CLEAR_VARS) 
LOCAL_MODULE := libutils 
LOCAL_SRC_FILES := $(APP_ABI)/libutils.so <= already 64bit lib 
include $(PREBUILT_SHARED_LIBRARY) 
..... 

Answer 1

__pthread_gettid不是NDK API。它在LIBC_PRIVATE版本部分：https://android.googlesource.com/platform/bionic/+/master/libc/libc.map.txt#1481