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** Changed in: wxwidgets3.0 (Debian)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1581807

Title:
  Define wxIsNaN() as std::isnan() in C++11 mode

Status in wxwidgets3.0 package in Ubuntu:
  Fix Released
Status in wxwidgets3.0 source package in Xenial:
  New
Status in wxwidgets3.0 package in Debian:
  Fix Released

Bug description:
  Audacity (git master) fails to build on Ubuntu 16.04 with g++ 5.3.1:

  In file included from /usr/include/wx-3.0/wx/gdicmn.h:23:0,
                   from /usr/include/wx-3.0/wx/utils.h:26,
                   from BlockFile.cpp:51:
  BlockFile.cpp: In function ‘void ComputeMinMax256(float*, float*, float*, int*)’:
  /usr/include/wx-3.0/wx/math.h:91:31: error: ‘isnan’ was not declared in this scope
       #define wxIsNaN(x) isnan(x)
                                 ^
  BlockFile.cpp:325:11: note: in expansion of macro ‘wxIsNaN’
         if (wxIsNaN(summary256[3*i+2]))
             ^
  /usr/include/wx-3.0/wx/math.h:91:31: note: suggested alternative:
       #define wxIsNaN(x) isnan(x)
                                 ^
  BlockFile.cpp:325:11: note: in expansion of macro ‘wxIsNaN’
         if (wxIsNaN(summary256[3*i+2]))
             ^
  In file included from /usr/include/wx-3.0/wx/math.h:58:0,
                   from /usr/include/wx-3.0/wx/gdicmn.h:23,
                   from /usr/include/wx-3.0/wx/utils.h:26,
                   from BlockFile.cpp:51:
  /usr/include/c++/5/cmath:641:5: note:   ‘std::isnan’
       isnan(_Tp __x)
       ^
  make[3]: *** [audacity-BlockFile.o] Error 1

  isnan() is not defined, but std::isnan() is defined. Thus use
  std::isnan() for all C++11 compilers, since isnan() is part of C++11.
  The fix was accepted upstream:
  https://github.com/wxWidgets/wxWidgets/pull/283

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