#pragma once

#include_next <cmath>

#ifndef WAF_BUILD
#  ifdef __GLIBC__
#    if __GLIBC_PREREQ(2, 23)
#      define GLIBC_FIX_NEEDED 1
#    else
#      define GLIBC_FIX_NEEDED 0
#    endif
#  else
#    define GLIBC_FIX_NEEDED 0
#  endif
#  if GLIBC_FIX_NEEDED || defined (__CYGWIN__)
#    ifndef HAVE_CMATH_ISFINITE
#      define HAVE_CMATH_ISFINITE
#      define NEED_CMATH_ISFINITE_STD_NAMESPACE
#    endif
#    ifndef HAVE_CMATH_ISINF
#      define HAVE_CMATH_ISINF
#      define NEED_CMATH_ISINF_STD_NAMESPACE
#    endif
#    ifndef HAVE_CMATH_ISNAN
#      define HAVE_CMATH_ISNAN
#      define NEED_CMATH_ISNAN_STD_NAMESPACE
#    endif
#  undef GLIBC_FIX_NEEDED
#  endif
#endif


#ifdef WAF_BUILD
#if defined(__CYGWIN__) || defined(__CYGWIN64__) || defined(CYGWIN_BUILD)
// cygwin path length issues in configure mean these come out wrong,
// so fix them here
#ifndef HAVE_CMATH_ISFINITE
# define HAVE_CMATH_ISFINITE
# define NEED_CMATH_ISFINITE_STD_NAMESPACE
#endif
#ifndef HAVE_CMATH_ISINF
# define HAVE_CMATH_ISINF
# define NEED_CMATH_ISINF_STD_NAMESPACE
#endif
#ifndef HAVE_CMATH_ISNAN
# define HAVE_CMATH_ISNAN
# define NEED_CMATH_ISNAN_STD_NAMESPACE
#endif
#endif
#endif

#if defined(HAVE_CMATH_ISFINITE) && defined(NEED_CMATH_ISFINITE_STD_NAMESPACE)
using std::isfinite;
#endif

#if defined(HAVE_CMATH_ISINF) && defined(NEED_CMATH_ISINF_STD_NAMESPACE)
using std::isinf;
#endif

#if defined(HAVE_CMATH_ISNAN) && defined(NEED_CMATH_ISNAN_STD_NAMESPACE)
using std::isnan;
#endif
