Re: [musl] Musl gentoo development: browsers

[Michael Forney <mforney@mforney.org>]

Recently, I've been spending some time writing upstreamable patches
for long standing musl incompatibilities in Firefox (and the parts it
imports from chromium), and pushing to get them fixed finally.

So far, I've had some good success:
https://hg.mozilla.org/mozilla-central/rev/1acc873aa118
https://hg.mozilla.org/mozilla-central/rev/660da1ec99c0
https://hg.mozilla.org/mozilla-central/rev/3ec8c96f4d53
https://hg.mozilla.org/mozilla-central/rev/7c6f9f854cfc
https://hg.mozilla.org/mozilla-central/rev/a3096ca24124

All but the last one should be available in the next Firefox release (74).

I believe the last remaining remaining issue is usage of getcontext in
tools/profiler. I've just filed a bug at
https://bugzilla.mozilla.org/show_bug.cgi?id=1615713. I have a couple
ideas for a fix (outlined in that bug), but haven't written a patch
yet. If anyone has suggestions, please let me know!

In one of the reviews, the reviewer mentioned about the existence of
build target support tiers:
https://developer.mozilla.org/en-US/docs/Mozilla/Supported_build_configurations

I was thinking that once Firefox can build with musl out of the box,
it would be really great to see if we can get Mozilla to consider musl
to be a Tier 3 target (at least x86_64), so we can avoid any musl
regressions in the future.

-Michael