Mercurial > hg > octave-nkf > gnulib-hg

view m4/ldexpf.m4 @ 17602:f98ee53d8e71

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
tests: simplify porting to Solaris 10 /bin/sh Some test cases in 'grep' need a shell that groks '$('; export re_shell_ for their benefit. Problem reported for 'grep' by Dagobert Michelsen in <http://bugs.gnu.org/16380>. * tests/init.sh (re_shell_): Export if it's used.
author Paul Eggert <eggert@cs.ucla.edu>
date Tue, 07 Jan 2014 11:46:27 -0800
parents 344018b6e5d7
children ab58d4870664
line wrap: on
line source

# ldexpf.m4 serial 2
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_LDEXPF],
[
  AC_REQUIRE([gl_MATH_H_DEFAULTS])
  AC_REQUIRE([gl_FUNC_LDEXP])

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

  dnl Test whether ldexpf() exists. We cannot assume that ldexpf(), if it
  dnl exists, is defined in the same library as ldexp(). This is not the case
  dnl on FreeBSD, NetBSD, OpenBSD.
  gl_MATHFUNC([ldexpf], [float], [(float, int)])
  if test $gl_cv_func_ldexpf_no_libm = no \
     && test $gl_cv_func_ldexpf_in_libm = no; then
    HAVE_LDEXPF=0
    LDEXPF_LIBM="$LDEXP_LIBM"
  fi
  AC_SUBST([LDEXPF_LIBM])
])