New module 'ilogbl'. * lib/math.in.h (ilogbl): New declaration. * lib/ilogbl.c: New file. * m4/ilogbl.m4: New file. * m4/math_h.m4 (gl_MATH_H): Test whether ilogbl is declared. (gl_MATH_H_DEFAULTS): Initialize GNULIB_ILOGBL, HAVE_ILOGBL. * modules/math (Makefile.am): Substitute GNULIB_ILOGBL, HAVE_ILOGBL. Split sed invocation, to avoid the limit of 100 substitutions of HP-UX 'sed'. * modules/ilogbl: New file. * tests/test-math-c++.cc: Check the declaration of ilogbl. * doc/posix-functions/ilogbl.texi: Mention the new module.

# xalloc.m4 serial 17
dnl Copyright (C) 2002-2006, 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.

AC_DEFUN([gl_XALLOC],
[
  gl_PREREQ_XALLOC
  gl_PREREQ_XMALLOC
])

# Prerequisites of lib/xalloc.h.
AC_DEFUN([gl_PREREQ_XALLOC], [
  AC_REQUIRE([gl_INLINE])
  :
])

# Prerequisites of lib/xmalloc.c.
AC_DEFUN([gl_PREREQ_XMALLOC], [
  :
])