kc3-lang/gnulib/m4/printf-frexp.m4

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• Hash : 1602f0af
  Author :
  Date : 2012-01-01T10:04:58
  

  maint: update all copyright year number ranges
  
  Run "make update-copyright".
  

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• m4/printf-frexp.m4

• # printf-frexp.m4 serial 5
  dnl Copyright (C) 2007, 2009-2012 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.
  
  dnl Check how to define printf_frexp() without linking with libm.
  
  AC_DEFUN([gl_FUNC_PRINTF_FREXP],
  [
    AC_REQUIRE([gl_CHECK_FREXP_NO_LIBM])
    if test $gl_cv_func_frexp_no_libm = yes; then
      gl_FUNC_FREXP_WORKS
      case "$gl_cv_func_frexp_works" in
        *yes)
          AC_DEFINE([HAVE_FREXP_IN_LIBC], [1],
            [Define if the frexp function is available in libc.])
          ;;
      esac
    fi
  
    AC_CACHE_CHECK([whether ldexp can be used without linking with libm],
      [gl_cv_func_ldexp_no_libm],
      [
        AC_LINK_IFELSE(
          [AC_LANG_PROGRAM(
             [[#include <math.h>
               double x;
               int y;]],
             [[return ldexp (x, y) < 1;]])],
          [gl_cv_func_ldexp_no_libm=yes],
          [gl_cv_func_ldexp_no_libm=no])
      ])
    if test $gl_cv_func_ldexp_no_libm = yes; then
      AC_DEFINE([HAVE_LDEXP_IN_LIBC], [1],
        [Define if the ldexp function is available in libc.])
    fi
  ])
  

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