Question

我想使用此CmakeLists.txt片段导入预建库：

add_library(openssl-crypto
            SHARED
            IMPORTED )
set_target_properties(openssl-crypto
                      PROPERTIES
                      IMPORTED_LOCATION
                      ${external_DIR}/libs/${ANDROID_ABI}/libcrypto.so )
include_directories(${external_DIR}/include/openssl)

我将此链接到我的库：

target_link_libraries(aes-crypto openssl-crypto)

尝试构建会返回此错误：

'/libs/arm64-v8a/libcrypto.so', needed by ...,  missing and no known rule to make it

Answer 1

我发现set_target_properties函数不喜欢相对路径。

来自CMake Documentation on IMPORTED_LOCATION

磁盘上主要文件的完整路径，用于IMPORTED目标。

要解决此问题，我使用了库的完整路径。

示例：

set_target_properties ( curl-lib 
                        PROPERTIES IMPORTED_LOCATION 
                        libs/${ANDROID_ABI}/libcurl.a )

. . . becomes . . . 

set_target_properties ( curl-lib 
                        PROPERTIES IMPORTED_LOCATION 
                        ${PROJECT_SOURCE_DIR}/src/main/cpp/libs/${ANDROID_ABI}/libcurl.a )

Answer 2

您可以使用set_property功能使用属性TARGET代替set_target_properties，然后您可以使用宏${PROJECT_SOURCE_DIR}相对设置路径。

# import shared library libmylib.so    
add_library( my-imported-lib 
             SHARED 
             IMPORTED) 

# set the path to appropriate so files with appropriate architectures
set_property(TARGET 
             my-imported-lib 
             PROPERTY IMPORTED_LOCATION ${PROJECT_SOURCE_DIR}/<path_to_libs_directory>/${ANDROID_ABI}/libmy-imported-lib.so) 

...

# link imported library to your developed library
target_link_libraries( my-developed-lib 
                       my-imported-lib )

也许你可以在使用${PROJECT_SOURCE_DIR}设置lib路径时使用宏set_target_properties，但我没有这样检查。

Answer 3

也许文件的日期时间错误。设置${external_DIR}/libs/${ANDROID_ABI}/libcrypto.so的当前日期时间：

touch ${external_DIR}/libs/${ANDROID_ABI}/libcrypto.so

cmake：在导入预建库时缺少并且没有已知的规则

3 个答案: