Will gn auto generate to cmake a solution ?

[gengjiawen]

In the long run, will be possible we auto generate CMakeLists.txt ?

I see skia has a script like this
https://github.com/google/skia/blob/master/gn/gn_to_cmake.py

[bnoordhuis]

It's something I've considered but the thing is that I want to maintain tight control over what is built and how and I'm somewhat wary that's viable longer-term when the CMakeLists.txt is auto-generated. I'm not completely opposed to the idea, however.

[mzbik]

Google GN and the BUILD.gn structure is pretty much equivalent to CMake. It takes a procedural/declarative description of the product and generates >one< build system from it. The output is already customized based on host and target architectures and various generation-time knobs.

This is not what I think Ben wants. He'd like to have all the same customization/etc. in CMake, not BUILD.gn.

Unfortunately, what's in the BUILD.gn files is >procedural< and it gets evaluated. We'd need to hack GN to not execute the BUILD.gn closures but to convert their logic into CMake code. I'm thinking this is REALLY not trivial.

I've got a modified gn_to_make.py that can make the inclusion of additional pieces of v8 a lot more mechanical, but it still takes a bunch of intelligence to figure this out.