[PATCH 2/2] Use autotools config.sub for --host and --build parsing

[Justus Winter]

This introduces a build dependency on autotools, update debian/control
accordingly.

Signed-off-by: Justus Winter <4winter at informatik.uni-hamburg.de>
---
 configure      |   28 ++++++----------------------
 debian/control |    1 +
 2 files changed, 7 insertions(+), 22 deletions(-)

diff --git a/configure b/configure
index 77203ed..182bd12 100755
--- a/configure
+++ b/configure
@@ -171,33 +171,17 @@ for option; do
     elif [ "${option}" = '--without-zsh-completion' ] ; then
        WITH_ZSH=0
     elif [ "${option%%=*}" = '--build' ] ; then
-       build_option="${option#*=}"
-       case ${build_option} in
-           *-*-*) ;;
-           *)
-               echo "Unrecognized value for --build option: ${build_option}"
-               echo "Should be: <cpu>-<vendor>-<os>"
-               echo "See:"
-               echo "  $0 --help"
-               echo ""
-               exit 1
-       esac
+       if ! build_option="`/usr/share/misc/config.sub "${option#*=}"`" ; then
+           exit 1
+       fi
        build_cpu=${build_option%%-*}
        build_option=${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 "  $0 --help"
-               echo ""
-               exit 1
-       esac
+       if ! host_option="`/usr/share/misc/config.sub "${option#*=}"`" ; then
+           exit 1
+       fi
        host_cpu=${host_option%%-*}
        host_option=${host_option#*-}
        host_vendor=${host_option%%-*}
diff --git a/debian/control b/debian/control
index b60790e..bfb5f01 100644
--- a/debian/control
+++ b/debian/control
@@ -8,6 +8,7 @@ Uploaders:
  David Bremner <bremner at debian.org>
 Build-Depends:
  debhelper (>= 7.0.50~),
+ autotools-dev,
  pkg-config,
  libxapian-dev,
  libgmime-2.6-dev | libgmime-2.4-dev,
-- 
1.7.9.1