uhd

dnl

dnl Copyright 2005,2008 Free Software Foundation, Inc.

dnl 

dnl This file is part of GNU Radio

dnl 

dnl GNU Radio is free software; you can redistribute it and/or modify

dnl it under the terms of the GNU General Public License as published by

dnl the Free Software Foundation; either version 3, or (at your option)

dnl any later version.

dnl 

dnl GNU Radio is distributed in the hope that it will be useful,

dnl but WITHOUT ANY WARRANTY; without even the implied warranty of

dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

dnl GNU General Public License for more details.

dnl 

dnl You should have received a copy of the GNU General Public License

dnl along with GNU Radio; see the file COPYING.  If not, write to

dnl the Free Software Foundation, Inc., 51 Franklin Street,

dnl Boston, MA 02110-1301, USA.

dnl 

dnl GR_LIB64()

dnl

dnl Checks to see if we're on a x86_64 or powerpc64 machine, and if so, determine

dnl if libdir should end in "64" or not.

dnl

dnl Sets gr_libdir_suffix to "" or "64" and calls AC_SUBST(gr_libdir_suffix)

dnl May append "64" to libdir.

dnl

dnl The current heuristic is:

dnl   if the host_cpu isn't x86_64 or powerpc64, then ""

dnl   if the host_os isn't linux, then ""

dnl   if we're cross-compiling, ask the linker, by way of the selected compiler

dnl   if we're x86_64 and there's a /lib64 and it's not a symlink, then "64", else ""

dnl   else ask the compiler

dnl

AC_DEFUN([GR_LIB64],[

  AC_REQUIRE([AC_CANONICAL_HOST])

  AC_REQUIRE([AC_PROG_CXX])

  AC_MSG_CHECKING([gr_libdir_suffix])

  gr_libdir_suffix=""

  AC_SUBST(gr_libdir_suffix)

  case "$host_os" in

    linux*) is_linux=yes ;;

    *)      is_linux=no  ;;

  esac

  if test "$is_linux" = no || test "$host_cpu" != "x86_64" && test "$host_cpu" != "powerpc64"; then

    gr_libdir_suffix=""

  elif test "$cross_compiling" = yes; then

    _GR_LIB64_ASK_COMPILER

  elif test "$host_cpu" = "x86_64"; then

    if test -d /lib64 && test ! -L /lib64; then

      gr_libdir_suffix=64

    fi

  else

    _GR_LIB64_ASK_COMPILER  

  fi

  AC_MSG_RESULT([$gr_libdir_suffix])

  AC_MSG_CHECKING([whether to append 64 to libdir])

  t=${libdir##*/lib}

  if test "$t" != 64 && test "$gr_libdir_suffix" = "64"; then

    libdir=${libdir}64

    AC_MSG_RESULT([yes. Setting libdir to $libdir])

  else

    AC_MSG_RESULT([no])

  fi

])

dnl If we're using g++, extract the first SEARCH_DIR("...") entry from the linker script

dnl and see if it contains a suffix after the final .../lib part of the path.

dnl (This works because the linker script varies depending on whether we're generating

dnl 32-bit or 64-bit executables)

dnl

AC_DEFUN([_GR_LIB64_ASK_COMPILER],[

  if test "$ac_cv_cxx_compiler_gnu" = "yes";

  then

    gr_libdir_suffix=`$CXX -Wl,--verbose 2>/dev/null | sed -n -e '/SEARCH_DIR/{s/;.*$//; s,^.*/,,; s/".*$//; s/^lib//; p}'`

  fi

])