qemu @4.2.0: Undefined symbols: _clock_gettime

[ryandesign (Ryan Carsten Schmidt)]

Even though the qemu port includes the legacysupport portgroup, ​it fails to build on Lion with an error that including that portgroup should have corrected:

  LINK    qemu-nbd
Undefined symbols for architecture x86_64:
  "_clock_gettime", referenced from:
      _read_f in qemu-io-cmds.o
      _readv_f in qemu-io-cmds.o
      _write_f in qemu-io-cmds.o
      _writev_f in qemu-io-cmds.o
      _aio_read_f in qemu-io-cmds.o
      _aio_read_done in qemu-io-cmds.o
      _aio_write_f in qemu-io-cmds.o
      ...
ld: symbol(s) not found for architecture x86_64

Since the problem happens at link time, it makes me wonder if the build system might not be respecting our LDFLAGS. I can't see, because the build system uses silent rules.

[raimue (Rainer Müller)]

As this only affects outdated versions of macOS, I will not work on the issue myself. However, if anyone else can come up with patches, I will happily them.

[ryandesign (Ryan Carsten Schmidt)]

Could you at least modify the build to disable silent rules, so that we can investigate further?

[kencu (Ken)]

i fixed this already before. And then ionic took that fix and tweaked it. did this come back again?

qemu does not use link args normally. there's a lot of analysis in the previous ticket where we fixed this.

[kencu (Ken)]

see also #59257

[ryandesign (Ryan Carsten Schmidt)]

Previously, it looks like the port was building correctly in the build phase, and then rebuilding incorrectly in the destroot phase. The fix was to prevent the incorrect rebuild.

Now, in #60494, we see that the problem still exists in 5.0.0 and that it fails during the initial build. It seems to just be ignoring our LDFLAGS entirely.

[ryandesign (Ryan Carsten Schmidt)]

​https://github.com/macports/macports-ports/pull/7105

[ryandesign (Ryan Carsten Schmidt)]

In eae27eb1fc6dd2f1b1518c30fe15ce7590707fa2/macports-ports (master):

qemu: Use MacPorts LDFLAGS

Closes: #60211