Re: subtle problem of font-lock in *compilation* buffer

[Chong Yidong]

>> I don't know whqether it's uncommon or not, but if a packages uses
>> libtool with "-version-info M:N:L" argument, the above line
>> appears.  It may be too ad hoc but we can tell font-lock
>> that a line matching with the regexp "-version-info [0-9]"
>> is not an error message (if font-lock accepts such a
>> request).
>
> I don't see a straightforward way of doing this, but I guess it's
> worth a shot.

On further consideration, it's impossible to handle this perfectly:
consider compiling a file named "foo -version-info 1", which gives
rise to the error message

foo -version-info 1:0: blah blah
^^^^^^^^^^^^^^^^^^^