C Protobuf with GCC

[jbo@]

I have a cross-platform project using devel/cmake and C++20. This project compiles fine under Windows, Linux and MacOS.

The project uses Google's protobuf library. On FreeBSD, I installed those from devel/protobuf.
The problem I'm facing is that the project requires lang/gcc11 as clang is missing some C++20 features at the moment. However, the /usr/lib/libprotobuf.so library was apparently compiled with devel/llvm which prevents GCC from successfully linking to it.

I can't imagine that I'm the first one running into this problem.
How would one deal with this situation?

 

[eternal_noob]

Remove the devel/protobuf package and compile it yourself?

 

[jbo@]

I already built it myself using poudriere.

Two questions on this:

• How do I specify which compiler poudriere should use to build a specific port (eg. devel/protobuf)
• Is there a mechanism which allows me to still have devel/protobuf built using devel/llvm but also a version using lang/gcc11 and serve both via the repo?

 

[eternal_noob]

I don't know about Poudriere but i meant to build it with GCC and use CMAKE to link to that version.

However, the /usr/lib/libprotobuf.so library was apparently compiled with devel/llvm which prevents GCC from successfully linking to it.

This is strange, i can't see a reason why GCC would not correctly link it.

 

[kpedersen]

I have a cross-platform project using devel/cmake and C++20.

If possible I would recommend putting a little bit of effort in to reduce the dependency on C++20 features.

Chasing standards and *needing* C++20 is generally a bad thing in programming. As you have seen it actually reduces cross-platform support. I most often see CompSci students making this mistake.

C++ versions are not like houses (or pizza). Bigger isn't necessarily better.

(unless you are really just learning / playing with a feature, then ignore my noise!)

 

[Jose]

C++ versions are not like houses (or pizza). Bigger isn't necessarily better.

And in some cases like mailman and sqoop, the bigger version is objectively worse.

 

[jbo@]

I don't know about Poudriere but i meant to build it with GCC and use CMAKE to link to that version.

I'll give that a shot!

(unless you are really just learning / playing with a feature, then ignore my noise!)

That is exactly the case with this project. It's nothing production ready/worthy. It's mainly a project to specifically play with / test the various C++20 features.