package/boost/0003-fenv.patch

   1 Disable fenv.h in certain configurations
   2
   3 The boost build system does not properly test whether fenv.h is
   4 available, and if it is, if it supports all the features used by
   5 Boost. This causes build failures with uClibc (reported upstream at
   6 https://svn.boost.org/trac/boost/ticket/11756) but also with glibc on
   7 specific architectures that don't have a full fenv implementation,
   8 such as NIOSII or Microblaze.
   9
  10 To address this, we forcefully disable the use of fenv support in the
  11 affected configurations.
  12
  13 Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
  14 [Thomas: add Microblaze/NIOSII exclusions.]
  15 Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
  16
  17 Index: b/boost/config/platform/linux.hpp
  18 ===================================================================
  19 --- a/boost/config/platform/linux.hpp
  20 +++ b/boost/config/platform/linux.hpp
  21 @@ -47,6 +47,16 @@
  22  #endif
  23
  24  //
  25 +// uClibc has no support for fenv.h, and also a few architectures
  26 +// don't have fenv.h support at all (or incomplete support) even with
  27 +// glibc.
  28 +
  29 +//
  30 +#if defined(__UCLIBC__) || defined(__nios2__) || defined(__microblaze__)
  31 +#  define BOOST_NO_FENV_H
  32 +#endif
  33 +
  34 +//
  35  // If glibc is past version 2 then we definitely have
  36  // gettimeofday, earlier versions may or may not have it:
  37  //