[PATCH] configure: add ignored options for compatibility.

diff --git a/20/022c6b5804f06248df018f1a311c9a242de804 b/20/022c6b5804f06248df018f1a311c9a242de804
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+++ b/20/022c6b5804f06248df018f1a311c9a242de804
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+From: =?iso-8859-1?q?C=E9dric_Cabessa?= <ced@ryick.net>\r
+Date: Sun, 25 Apr 2010 01:33:10 +0200\r
+Subject: [PATCH] configure: add ignored options for compatibility.\r
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+\r
+gentoo's ebuild script expects 2 more options for configure:\r
+  --host (same format as --build)\r
+  --datadir\r
+---\r
+ configure |   20 ++++++++++++++++++++\r
+ 1 files changed, 20 insertions(+), 0 deletions(-)\r
+\r
+diff --git a/configure b/configure\r
+index ec8c3fd..c522ad8 100755\r
+--- a/configure\r
++++ b/configure\r
+@@ -77,7 +77,9 @@ Additional options are accepted for compatibility with other\r
+ configure-script calling conventions, but don't do anything yet:\r
+ \r
+       --build=<cpu>-<vendor>-<os>     Currently ignored\r
++      --host=<cpu>-<vendor>-<os>      Currently ignored\r
+       --infodir=DIR                   Currently ignored\r
++      --datadir=DIR                   Currently ignored\r
+       --localstatedir=DIR             Currently ignored\r
+       --libexecdir=DIR                Currently ignored\r
+       --disable-maintainer-mode       Currently ignored\r
+@@ -119,8 +121,26 @@ for option; do\r
+       build_option=${build_option#*-}\r
+       build_vendor=${build_option%%-*}\r
+       build_os=${build_option#*-}\r
++    elif [ "${option%%=*}" = '--host' ] ; then\r
++      host_option="${option#*=}"\r
++      case ${host_option} in\r
++          *-*-*) ;;\r
++          *)\r
++              echo "Unrecognized value for --host option: ${host_option}"\r
++              echo "Should be: <cpu>-<vendor>-<os>"\r
++              echo "See:"\r
++              echo "  $0 --help"\r
++              echo ""\r
++              exit 1\r
++      esac\r
++      host_cpu=${host_option%%-*}\r
++      host_option=${host_option#*-}\r
++      host_vendor=${host_option%%-*}\r
++      host_os=${host_option#*-}\r
+     elif [ "${option%%=*}" = '--infodir' ] ; then\r
+       true\r
++    elif [ "${option%%=*}" = '--datadir' ] ; then\r
++      true\r
+     elif [ "${option%%=*}" = '--localstatedir' ] ; then\r
+       true\r
+     elif [ "${option%%=*}" = '--libexecdir' ] ; then\r
+-- \r
+1.7.0.4\r
+\r