NDK 构建错误（错误：链接器命令失败，退出代码为 1（使用 -v 查看调用））

Question

文件Application.mk

APP_STL := gnustl_static
APP_ABI := all

文件Android.mk

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)
LOCAL_MODULE := libz
LOCAL_SRC_FILES := ../prebuild/libz.a
LOCAL_EXPORT_C_INCLUDES := ../prebuild/include/
include $(PREBUILT_STATIC_LIBRARY)

include $(CLEAR_VARS)
LOCAL_MODULE := libssl
LOCAL_SRC_FILES := ../prebuild/libssl.a
LOCAL_EXPORT_C_INCLUDES := ../prebuild/include
include $(PREBUILT_STATIC_LIBRARY)

include $(CLEAR_VARS)
LOCAL_MODULE := libcrypto
LOCAL_SRC_FILES := ../prebuild/libcrypto.a
LOCAL_EXPORT_C_INCLUDES := ../prebuild/include
include $(PREBUILT_STATIC_LIBRARY)

include $(CLEAR_VARS)
LOCAL_MODULE := libjson-c
LOCAL_SRC_FILES := ../prebuild/libjson-c.a
LOCAL_EXPORT_C_INCLUDES := ../prebuild/include
include $(PREBUILT_STATIC_LIBRARY)

include $(CLEAR_VARS)
LOCAL_MODULE := libcurl
LOCAL_SRC_FILES := ../prebuild/include/libcurlall/$(TARGET_ARCH_ABI)/libcurl.a
LOCAL_EXPORT_C_INCLUDES := ../prebuild/include
include $(PREBUILT_STATIC_LIBRARY)

include $(CLEAR_VARS)
LOCAL_MODULE := curl-ndk
LOCAL_SRC_FILES := ../cpp/curl-http.cpp
LOCAL_STATIC_LIBRARIES := libcurl libssl libcrypto libz libjson-c
LOCAL_LDLIBS := -lz -llog -ljnigraphics
include $(BUILD_SHARED_LIBRARY)

清理项目。我正在尝试交叉编译 NDK，但随后显示以下错误：

/Volumes/Work/Android/Projects/app/src/main/jni/../prebuild/libz.a: error adding symbols: File in wrong format
clang++: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [/Volumes/Work/Android/Projects/app/src/main/obj/local/arm64-v8a/libcurl-ndk.so] Error 1

在 32 位上运行良好，但在 64 位上显示错误。

Answer 1

您正在为所有 ABI 使用一个预构建的。您需要为每个目标 ABI 预构建一个。编写预构建模块的典型方法是这样的：

include $(CLEAR_VARS)
LOCAL_MODULE := libz
LOCAL_SRC_FILES := ../prebuild/$(TARGET_ARCH_ABI)/libz.a
LOCAL_EXPORT_C_INCLUDES := ../prebuild/include/
include $(PREBUILT_STATIC_LIBRARY)

然后您可以拥有 prebuild/armeabi-v7a/libz.a、prebuild/arm64-v8a/libz.a 等。使用

APP_ABI

禁用您不想为其构建（或没有预构建）的 ABI在你的 Application.mk.