perl_features
ithreads

PERL_FEATURES setting enabling interpreter level threads, has some compatibility problems

Other “perl_features” USE_EXPAND flag values

Use FlagDescription
perl_features_debugPERL_FEATURES setting enabling internal debug support in Perl
perl_features_ithreadsPERL_FEATURES setting enabling interpreter level threads, has some compatibility problems
perl_features_quadmathPERL_FEATURES setting enabling 128bit floating point arithmetic via libquadmath

All packages providing a “perl_features_ithreads” USE flag (1849)