view m4/fabsf.m4 @ 17834:e0838da3bfe8

parse-datetime: avoid a compiler warning with byacc * lib/parse-datetime.y (yylex): Use the same prototype in the function definition as the declaration, to avoid a -Wstrict-prototypes warning seen when using byacc.
author Tim Rühsen <tim.ruehsen@gmx.de>
date Sun, 14 Dec 2014 20:32:54 +0000
parents 344018b6e5d7
children ab58d4870664
line wrap: on
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# fabsf.m4 serial 3
dnl Copyright (C) 2011-2014 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_FABSF],
[
  AC_REQUIRE([gl_MATH_H_DEFAULTS])
  AC_REQUIRE([gl_FUNC_FABS])

  dnl Persuade glibc <math.h> to declare fabsf().
  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])

  dnl Test whether fabsf() exists. We cannot assume that fabsf(), if it
  dnl exists, is defined in the same library as fabs(). This is not the case
  dnl on FreeBSD, NetBSD, OpenBSD.
  gl_MATHFUNC([fabsf], [float], [(float)])
  if test $gl_cv_func_fabsf_no_libm = no \
     && test $gl_cv_func_fabsf_in_libm = no; then
    HAVE_FABSF=0
    FABSF_LIBM="$FABS_LIBM"
  fi
  AC_SUBST([FABSF_LIBM])
])