[Boost-bugs] [Boost C++ Libraries] #12044: Passing -Ofast to pathscale toolchain is unsafe and break stuff

Subject: [Boost-bugs] [Boost C++ Libraries] #12044: Passing -Ofast to pathscale toolchain is unsafe and break stuff
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2016-03-06 17:29:39

#12044: Passing -Ofast to pathscale toolchain is unsafe and break stuff
-------------------------------------+---------------------------
 Reporter:  Michał Górny <mgorny@…>  |      Owner:  vladimir_prus
     Type:  Bugs                     |     Status:  new
Milestone:  To Be Determined         |  Component:  build
  Version:  Boost Development Trunk  |   Severity:  Problem
 Keywords:                           |
-------------------------------------+---------------------------
 When attempting to bootstrap boost-build with pathscale toolset, the build
 fails with internal compiler problem. It turns out it happens because of
 `-Ofast` being passed to the compiler.

 It is unclear to me why `-Ofast -O3` is being used there (no other toolset
 does that) but it sounds like a really bad idea. Besides to triggering
 compiler bugs like the one mentioned there, it also enables various
 insecure optimizations.

 Please consider 'lowering' the flags down to regular `-O3`. I'm attaching
 a bootstrap.log with the failure and a proposed patch.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/12044>
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