在Android AOSP中使用预建共享库

Question

我想在AOSP中使用预先构建的共享库.该库在Android.mk中定义如下:

include $(CLEAR_VARS)
LOCAL_MODULE := foo
LOCAL_MODULE_SUFFIX := .so
LOCAL_MODULE_CLASS := SHARED_LIBRARIES
LOCAL_MODULE_TAG := optional
LOCAL_MODULE_PATH := system/lib
LOCAL_SRC_FILE := system/lib/foo.so
include $(BUILD_PREBUILT)

在构建期间,out/target/product/mako/obj/SHARED_LIBRARIES/foo_intermediates/export_include 创建了一个文件夹 .

但是,生成失败,并显示out/target/product/mako/obj_arm/SHARED_LIBRARIES/foo_intermediates/export_include无法找到的错误消息.

注意"obj"和"obj_arm"之间的区别.是什么原因造成的？

Answer 1

这是双目标构建(arm和arm64),因此有两个obj文件夹,一个用于32位arm,另一个用于64位arm.

我需要按如下方式定义库:

include $(CLEAR_VARS)
LOCAL_MODULE := libfoo
LOCAL_MODULE_SUFFIX :=.so
LOCAL_MODULE_CLASS := SHARED_LIBRARIES
LOCAL_MODULE_TAGS := optional
LOCAL_PRELINK_MODULE := false
ifdef TARGET_2ND_ARCH
LOCAL_MULTILIB := both
LOCAL_MODULE_PATH_64 := system/lib64
LOCAL_SRC_FILES_64 := system/lib64/libfoo.so
LOCAL_MODULE_PATH_32 := system/lib
LOCAL_SRC_FILES_32 := system/lib/libfoo.so
else
LOCAL_MODULE_PATH := system/lib
LOCAL_SRC_FILES := system/lib/libfoo.so
endif
include $(BUILD_PREBUILT)