dblaikie added a subscriber: rsmith.
dblaikie added a comment.
I realize I got this jumbled up and the thread about "why do we need to name
things" is meant to be over in D137059 <https://reviews.llvm.org/D137059>
(sorry @ben.boeckel :/ I know this is all confusing to follow at the best of
times) so I'll pick that up there.
But maybe a relevant question /here/ (maybe @iains has some context here, and
@ben.boeckel ): What are GCC's (& any other implementations) command line
interfaces for things like this? How're the command line flags spelled? To see
about inspiration for this.
(judging from the discourse thread with @rsmith it seems like "the ability to
generate a .o from a .pcm" is disfavored, he didn't outright say "we should
remove that functionality" but pretty close to it - in favor of ".cppm -> {.o,
.pcm}" and ".ccpm -> .o" + ".cppm -> .pcm" (without the ability to generate the
.o from the .pcm) - in which case we could change the existing driver behavior
sooner or later to address that third action (.cppm -> .pcm but it's only a
minimal pcm). Maybe we should have two flags one that says "produce a .pcm"
(which we already have `--precompile` for that) and another that says "produce
a .o" (I guess that's the default, so maybe we want a way to opt /out/ of that
behavior?))
Eh, sorry, just talking myself around in circles.
Currently we have:
`.cppm` -> `.o` (no extra flags)
`.cppm` -> `.pcm` (`--precompile`)
`.cppm` -> `.pcm` + `.o` (unsupported)
I'm not sure that `--precompile` is the best flag name to be inspired by (it's
unqualified by any `-f` or other prefix, which usually feels a bit weird, and
it's a very generic term, doesn't mention modules, etc) - so I can appreciate
the `-fsave-std-c++-module-file` name here, but it does sound a bit verbose?
Wouldn't mind hearing other people's thoughts on flag names, especially any
prior art/other implementation choices we could look for for inspiration.
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D137058/new/
https://reviews.llvm.org/D137058
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