diff options
Diffstat (limited to 'gr-howto-write-a-block/config/gr_lib64.m4')
| -rw-r--r-- | gr-howto-write-a-block/config/gr_lib64.m4 | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/gr-howto-write-a-block/config/gr_lib64.m4 b/gr-howto-write-a-block/config/gr_lib64.m4 new file mode 100644 index 000000000..751f774b4 --- /dev/null +++ b/gr-howto-write-a-block/config/gr_lib64.m4 @@ -0,0 +1,85 @@ +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 +]) + |