Re: [Boost-bugs] [Boost C++ Libraries] #11756: boost.Test: non standards compliant use of FE_* macros (unable to compile boost test library on FPU-less arches)

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #11756: boost.Test: non standards compliant use of FE_* macros (unable to compile boost test library on FPU-less arches)
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2017-03-11 20:01:38

#11756: boost.Test: non standards compliant use of FE_* macros (unable to compile
boost test library on FPU-less arches)
----------------------------------+------------------------
  Reporter:  bartosz.krasinski@…  |      Owner:  renficiaud
      Type:  Patches              |     Status:  reopened
 Milestone:  Boost 1.64.0         |  Component:  test
   Version:  Boost 1.59.0         |   Severity:  Problem
Resolution:                       |   Keywords:
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Comment (by Jörg Krause <joerg.krause@…>):

 For whatever reasons uclibc defines both `__UCLIBC__` '''and'''
 `__GLIBC__`, whereas musl does not define any such macro, e.g. there is no
 `__MUSL__` and will never be.

 This is the commit log from the fenv.h patch used in Buildroot (I cannot
 add links here):


 {{{
 The boost build system does not properly test whether fenv.h is
 available, and if it is, if it supports all the features used by
 Boost. This causes build failures with uClibc (reported upstream at
 https://svn.boost.org/trac/boost/ticket/11756) but also with glibc on
 specific architectures that don't have a full fenv implementation,
 such as NIOSII or Microblaze.

 To address this, we forcefully disable the use of fenv support in the
 affected configurations.
 }}}

 I am afraid I am not much of help here. From my point of view, it should
 be checked if fenv.h is available, and then check for the GLIBC
 extensions.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/11756#comment:56>
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