If you look at the smoke reports for blead on perl.develop-help.com, you will see that FAILs on Linux are strongly associated with FAILs in cpan/Time-HiRes/t/itimer.t when Perl is compiled with clang. Example: http://perl.develop-help.com/raw/?id=164615 Excerpt: ##### Automated smoke report for 5.21.2 patch 41a81de646c4a1f911f6906df66a4e77760e30d2 v5.21.1-191-g41a81de zwei: Intel(R) Core(TM) i7 CPU 920 @ 2.67GHz (GenuineIntel 2668MHz) (x86_64/8 cpu) on linux - 3.16.0-3-generic [debian] using clang version 4.2.1 Compatible Ubuntu Clang 3.4 (tags/RELEASE_34/final) smoketime 54 minutes 42 seconds (average 13 minutes 40 seconds) ##### Failures: (common-args) -Accflags="-DPERL_POISON -Werror=declaration-after-statement" -Dcc=clang [default] -DDEBUGGING -Duseithreads ../cpan/Time-HiRes/t/itimer.t...............................FAILED 2 Non-zero exit status: 1 ##### Is there anything we can do about this? Thank you very much. Jim KeenanThread Next