Hi, On 2022-07-11 16:38:05 -0400, Tom Lane wrote: > Andres Freund <and...@anarazel.de> writes: > > On 2022-07-11 15:54:22 -0400, Tom Lane wrote: > >> We can't simply move the file list into gen_node_support.pl, because > >> (a) the build system has to know about the dependencies involved > > > Meson has builtin support for tools like gen_node_support.pl reporting which > > files they've read and then to use those as dependencies. It'd not be a lot > > of > > effort to open-code that with make either. > > If you want to provide code for that, sure, but I don't know how to do it.
It'd basically be something like a --deps option providing a path to a file (e.g. .deps/nodetags.Po) where the script would emit something roughly equivalent to path/to/nodetags.h: path/to/nodes/nodes.h path/to/nodetags.h: path/to/nodes/primnodes.h ... path/to/readfuncs.c: path/to/nodetags.h It might or might not make sense to output this as one rule instead of multiple ones. I think our existing dependency support would do the rest. We'd still need a dependency on node-support-stamp (or nodetags.h or ...), to trigger the first invocation of gen_node_support.pl. I don't think it's worth worrying about this not working reliably for non --enable-depend builds, there's a lot more broken than this. But it might be a bit annoying to deal with either a) creating the .deps directory even without --enable-depend, or b) specifying --deps only optionally. I can give it a go if this doesn't sound insane. Greetings, Andres Freund
