add -W compile option to get warnings for unused arguments, etc. This is the default on MacOS X. Also add -fmessage-length=0 to display compiler messages on a single line facilitating the parsing of warning messages.
add -W compile option to get warnings for unused arguments, etc. This is
the default on MacOS X. Also add -fmessage-length=0 to display compiler
messages on a single line facilitating the parsing of warning messages.


git-svn-id: ecbadac9c76e8cf640a0bca86f6bd796c98521e3@7027 27541ba8-7e3a-0410-8455-c3a389f83636

dawehner/root,bbannier/ROOT,bbannier/ROOT,dawehner/root,bbannier/ROOT,bbannier/ROOT,dawehner/root,bbannier/ROOT,bbannier/ROOT,dawehner/root,bbannier/ROOT,dawehner/root,dawehner/root,dawehner/root,dawehner/root