kc3-lang/gnulib/m4/copysignl.m4

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• Hash : 32a72f45
  Author :
  Date : 2023-01-01T01:14:21
  

  maint: run 'make update-copyright'
  

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• m4/copysignl.m4

• # copysignl.m4 serial 3
  dnl Copyright (C) 2011-2023 Free Software Foundation, Inc.
  dnl This file is free software; the Free Software Foundation
  dnl gives unlimited permission to copy and/or distribute it,
  dnl with or without modifications, as long as this notice is preserved.
  
  AC_DEFUN([gl_FUNC_COPYSIGNL],
  [
    AC_REQUIRE([gl_MATH_H_DEFAULTS])
    AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE])
  
    dnl Persuade glibc <math.h> to declare copysignl().
    AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
  
    dnl Determine COPYSIGNL_LIBM.
    gl_MATHFUNC([copysignl], [long double], [(long double, long double)])
    if test $gl_cv_func_copysignl_no_libm = no \
       && test $gl_cv_func_copysignl_in_libm = no; then
      HAVE_COPYSIGNL=0
      if test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 1; then
        AC_REQUIRE([gl_FUNC_COPYSIGN])
        COPYSIGNL_LIBM="$COPYSIGN_LIBM"
      else
        COPYSIGNL_LIBM=
      fi
    fi
    AC_SUBST([COPYSIGNL_LIBM])
  ])
  

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