view m4/copysign.m4 @ 40231:9b3c79fdfe0b

strtod: fix clash with strtold Problem reported for RHEL 5 by Jesse Caldwell (Bug#34817). * lib/strtod.c (compute_minus_zero, minus_zero): Simplify by remving the macro / external variable, and having just a function. User changed. This avoids the need for an external variable that might clash.
author Paul Eggert <eggert@cs.ucla.edu>
date Mon, 11 Mar 2019 16:40:29 -0700
parents b06060465f09
children
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# copysign.m4 serial 1
dnl Copyright (C) 2011-2019 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_COPYSIGN],
[
  AC_REQUIRE([gl_MATH_H_DEFAULTS])

  dnl Determine COPYSIGN_LIBM.
  gl_MATHFUNC([copysign], [double], [(double, double)])
  if test $gl_cv_func_copysign_no_libm = no \
     && test $gl_cv_func_copysign_in_libm = no; then
    HAVE_COPYSIGN=0
    COPYSIGN_LIBM=
  fi
  AC_SUBST([COPYSIGN_LIBM])
])