This update breaks some C++ implementations (see [1] and
05ed2cb76b).
All packages that depend on libmicrohttpd have been checked; all but two
(psensor and retroshare) build against libmicrohttpd >= 0.9.71 by now,
and those two are easy enough to patch.
The relevant change is just switching some API return types from `int`
to an enum with the same values, so there isn't any concern about ABI
compatibility with the change (and in fact it's only a warning on a C
compiler).
[1] https://github.com/kismetwireless/kismet/issues/281
Also move to llvm12 and add llvm-unwind-devel to depends, since it's
required by some packages when building things with ldc.
Forcing linking against libunwind from llvm is necessary, otherwise the
resulting runtime is underlinked and fails to find the unw_* symbols it
needs. Argument taken from Alpine:
aaaa982c68/community/ldc/APKBUILD
It's in POSIX-future and some applications have started depending on it.
It's easier to backport into musl than fix each individual package.
Since we are adding a new interface to libc, update common/shlibs entry
as well. This should probably have been done for all musl updates.
And since we are here, also backport:
- isascii fix (removes the need for a patch in fceux)
- make epoll a cancellation point (fixes a bug in jack pipewire utilities)
- still depends on nodejs 10, which will be EOL starting May 2021
- template is very out of date (current version is 1.56.0), which shows
lack of interest for the package
- as seen in [1], depends on outdated electron9 (which void no longer
provides, if we wanted to use system electron), and that's a recent
development
[1] https://github.com/atom/atom/pull/21777
