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configure: Improve help behavior

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Old:
There are two paths to show help and exit 1, one is with "-h" or
"--help", one is with invalid options.

New:
Show help and exit 0 for --help.
On invalid option, don't show the long help and bury the early "ERROR:"
line, just give a message pointing to --help.

Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
This commit is contained in:
Fam Zheng 2014-04-18 14:55:36 +08:00 committed by Michael Tokarev
parent 6e1d3c1c85
commit 2d2ad6d090
1 changed files with 5 additions and 2 deletions
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7
configure vendored
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@ -1087,7 +1087,10 @@ for opt do
;; ;;
--enable-quorum) quorum="yes" --enable-quorum) quorum="yes"
;; ;;
*) echo "ERROR: unknown option $opt"; show_help="yes" *)
echo "ERROR: unknown option $opt"
echo "Try '$0 --help' for more information"
exit 1
;; ;;
esac esac
done done
@ -1353,7 +1356,7 @@ Advanced options (experts only):
NOTE: The object files are built at the place where configure is launched NOTE: The object files are built at the place where configure is launched
EOF EOF
exit 1 exit 0
fi fi
# Now we have handled --enable-tcg-interpreter and know we're not just # Now we have handled --enable-tcg-interpreter and know we're not just