configure: add ignored options for compatibility.

gentoo's ebuild script expects 2 more options for configure:
  --host (same format as --build)
  --datadir

diff --git a/configure b/configure
index ec8c3fd361cb9061197dc29ab326a142a1d65ad9..c522ad8524becfdb28ff73aefefbca6bb08c0411 100755 (executable)
--- a/configure
+++ b/configure
@@ -77,7 +77,9 @@ Additional options are accepted for compatibility with other
 configure-script calling conventions, but don't do anything yet:
 
        --build=<cpu>-<vendor>-<os>     Currently ignored
+       --host=<cpu>-<vendor>-<os>      Currently ignored
        --infodir=DIR                   Currently ignored
+       --datadir=DIR                   Currently ignored
        --localstatedir=DIR             Currently ignored
        --libexecdir=DIR                Currently ignored
        --disable-maintainer-mode       Currently ignored
@@ -119,8 +121,26 @@ for option; do
        build_option=${build_option#*-}
        build_vendor=${build_option%%-*}
        build_os=${build_option#*-}
+    elif [ "${option%%=*}" = '--host' ] ; then
+       host_option="${option#*=}"
+       case ${host_option} in
+           *-*-*) ;;
+           *)
+               echo "Unrecognized value for --host option: ${host_option}"
+               echo "Should be: <cpu>-<vendor>-<os>"
+               echo "See:"
+               echo "  $0 --help"
+               echo ""
+               exit 1
+       esac
+       host_cpu=${host_option%%-*}
+       host_option=${host_option#*-}
+       host_vendor=${host_option%%-*}
+       host_os=${host_option#*-}
     elif [ "${option%%=*}" = '--infodir' ] ; then
        true
+    elif [ "${option%%=*}" = '--datadir' ] ; then
+       true
     elif [ "${option%%=*}" = '--localstatedir' ] ; then
        true
     elif [ "${option%%=*}" = '--libexecdir' ] ; then