add_rules("protobuf.cpp") 应该以 host 方式编译 并使用 protoc

[19317362]

你在什么场景下需要该功能？

目前的版本，交叉编译时，protoc 也交叉编译了，造成交叉编译时不会基于 proto文件生成 .pb.cc 和 .pb.h

描述可能的解决方案

add_rules("protobuf.cpp") 应该以 host 方式编译 并使用 protoc

描述你认为的候选方案

No response

其他信息

No response

[Issues-translate-bot]

Bot detected the issue body's language is not English, translate it automatically.

---

Title: add_rules("protobuf.cpp") should be compiled in host mode and use protoc

In what scenario do you need this feature?

In the current version, when cross-compiling, protoc is also cross-compiled, causing .pb.cc and .pb.h to not be generated based on the proto file during cross-compilation.

Describe possible solutions

add_rules("protobuf.cpp") should be compiled in host mode and use protoc

Describe your alternatives

No response

other information

No response

[waruqi]

目前这个包原本就还不支持交叉编译。你可以提 pr 过来改进这个包。

https://github.com/xmake-io/xmake-repo/blob/3a7bd844fd0f9d9702b9bbd11710d1fa685c99e8/packages/p/protobuf-cpp/xmake.lua#L54

[Issues-translate-bot]

Bot detected the issue body's language is not English, translate it automatically.

---

Currently, this package does not originally support cross-compilation. You can submit a PR to improve this package.

https://github.com/xmake-io/xmake-repo/blob/3a7bd844fd0f9d9702b9bbd11710d1fa685c99e8/packages/p/protobuf-cpp/xmake.lua#L54

[star-hengxing]

我改进了一下 protoc 包，原来是直接下载预编译二进制，现在是 binary package，永远只会构建 host tool。 因为 protobuf-cpp 没有单独构建 protoc 的选项，所以 protoc 的实现很简单，直接用 protobuf-cpp 作为依赖。

package("protoc")
    set_kind("binary")
    add_deps("protobuf-cpp")

    on_install(function (package) end)

    on_test(function (package)
        os.vrun("protoc --version")
    end)

protoc 的版本需要用 add_requireconfs 指定。

add_requires("protoc", "protobuf-cpp")
add_requireconfs("protoc.protobuf-cpp", {version = "1.0.0"})

add_packages("protoc", "protobuf-cpp")

如果不用 protoc 包，交叉编译就这样：

add_requires("protobuf-cpp~host", {host = true, alias = "protoc"})
add_requires("protobuf-cpp")

add_packages("protoc", {links = {}})
add_packages("protobuf-cpp")

[waruqi]

我改进了一下 protoc 包，原来是直接下载预编译二进制，现在是 binary package，永远只会构建 host tool。 因为 protobuf-cpp 没有单独构建 protoc 的选项，所以 protoc 的实现很简单，直接用 protobuf-cpp 作为依赖。

package("protoc")
    set_kind("binary")
    add_deps("protobuf-cpp")

    on_install(function (package) end)

    on_test(function (package)
        os.vrun("protoc --version")
    end)

protoc 的版本需要用 add_requireconfs 指定。

add_requires("protoc", "protobuf-cpp")
add_requireconfs("protoc.protobuf-cpp", {version = "1.0.0"})

add_packages("protoc", "protobuf-cpp")

如果不用 protoc 包，交叉编译就这样：

add_requires("protobuf-cpp~host", {host = true, alias = "protoc"})
add_requires("protobuf-cpp")

add_packages("protoc", {links = {}})
add_packages("protobuf-cpp")

如果用法变了，最好同步下 tests example 和相关文档

https://github.com/xmake-io/xmake/blob/dev/tests/projects/c%2B%2B/protobuf/xmake.lua