[Gc] Symbols with hidden attribute in gc-7.2

[Paulo César Pereira de Andrade]

  Hi,

  I am working on several dependency packages with goal to package
sagemath in fedora. But rawhide did update to gc-7.2 that now tags
several functions as GC_INNER.

  The problem is that that breaks one of the sagemath packages, that
is http://ecls.sourceforge.net/

  I had an open bug report for ecl for another issue, but in the meantime
I did upgrade to Fedora rawhide... The bug report was due to a dead
lock in ecl and gc usage of signals to stop threads, see:

https://sourceforge.net/tracker/?func=detail&aid=3526174&group_id=30035&atid=398053

  I understand that ecls calls private gc functions, but would like to
suggest to ecl upstream some alternative to correct problem.

Thanks,
Paulo