#include_next <math.h>
  
  /* s_roundf.c uses isinff and isnanf. Let's correct this */
  
  #define isinff(x) __builtin_isinf(x)
  #define isnanf(x) __builtin_isnan(x)
  
  /* In accordance with the C99 standard, we've defined libm function as macros to
   * leverage compiler optimizations. When comes the time to actually implement
   * those functions, we don't want the macro to be active. OpenBSD doesn't use
   * macros so it doesn't bother #undef-ing libm functions. Let's do it here. */
  
  #undef acosf
  #undef acoshf
  #undef asinf
  #undef asinhf
  #undef atanf
  #undef atan2f
  #undef atanhf
  #undef ceilf
  #undef copysignf
  #undef cosf
  #undef coshf
  #undef expf
  #undef expm1f
  #undef fabsf
  #undef floorf
  #undef fmodf
  #undef ldexpf
  #undef lgammaf
  #undef lgammaf_r
  #undef log1pf
  #undef log10f
  #undef logf
  #undef nearbyintf
  #undef powf
  #undef roundf
  #undef scalbnf
  #undef sinf
  #undef sinhf
  #undef sqrtf
  #undef tanf
  #undef tanhf
  #undef truncf
  
  #undef acos
  #undef acosh
  #undef asin
  #undef asinh
  #undef atan
  #undef atan2
  #undef atanh
  #undef ceil
  #undef copysign
  #undef cos
  #undef cosh
  #undef erf
  #undef erfc
  #undef exp
  #undef expm1
  #undef fabs
  #undef floor
  #undef fmod
  #undef lgamma
  #undef lgamma_r
  #undef log
  #undef log1p
  #undef log10
  #undef log2
  #undef logb
  #undef pow
  #undef rint
  #undef round
  #undef scalbn
  #undef sin
  #undef sinh
  #undef sqrt
  #undef tgamma
  #undef tan
  #undef tanh
  #undef trunc