如何让CMake在Windows上找到google protobuf？

Question

我正在使用Google Protobuf和CMake.在Linux上,Protobuf库可以通过以下方式找到:

find_package( Protobuf REQUIRED ) 

CMake知道在哪里寻找图书馆.我怎么能在Windows中使用它？我应该创建一个环境变量,例如PROTOBUF_LIB？我已经查看FindProtobuf.cmake但无法解决所需的问题.

Answer 1

我也在努力解决这个问题.更清楚.

在Windows上(7,类似于旧版Windows):开始 - >控制面板 - >系统 - >高级系统设置 - >环境变量

然后在顶部面板或底部面板上(如果您希望它应用于其他用户在底部执行),创建两个新变量.第一个是

• CMAKE_INCLUDE_PATH指向包含路径的底部(应包含"google"文件夹)
• CMAKE_LIBRARY_PATH它应该包含"libprotobuf""libprotobuf - 精简版""liteprotoc" .lib文件.

创建变量后,按"确定",然后重新启动cmake(或清理缓存).

Answer 2

Newest protobuf v3 have CMake support out of the box.

You could use protobuf repository as submodule and just use

add_subdiretory("third-party/protobuf/cmake")

to get all protobuf targets. Then you can add dependency to protobuf with

target_link_libraries(YourLibrary libprotobuf libprotobuf-lite libprotoc)

Another possible way is available. With protobuf's CMake configuration you can build and install protobuf binaries once and use them across several projects in your development:

git clone https://github.com/google/protobuf.git
mkdir protobuf\tmp
cd protobuf\tmp
cmake ..\cmake
cmake --build .
cmake --build . --target install

Then you can use find_package with hint paths like

find_package(protobuf REQUIRED
    HINTS
       "C:/Program Files/protobuf"
        "C:/Program Files (x86)/protobuf")
if (NOT PROTOBUF_FOUND)
    message("protobuf not found")
    return()
endif()

Hope this helps.

Answer 3

Windows 上的 Protobuf 调用 find_library 它将搜索您的 PATH 和 LIB 变量。