mail/filtermail fails to build with 13.0-CURRENT

[Jung-uk Kim]

On 20. 6. 29., Jung-uk Kim wrote:
> On 20. 6. 27., Dimitry Andric wrote:
>> On 27 Jun 2020, at 17:56, Mike Clarke
>> <jmc-freebsd2 at milibyte.co.uk> wrote:
>>> As someone with very little experience with C++ I'd welcome
>>> advice on how to fix this for 13.0- CURRENT. It builds without
>>> problem on 12.1-RELEASE
>> ...
>>> rcfile.ll:151:14: error: no viable overloaded '=' yyin = new
>>> ifstream (sub_file.c_str ()); ~~~~ ^
>>> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>
>> This appears to be caused by a recent update to contrib/flex
>> from 2.5.37 (7 years old) to 2.6.4, in r362333, where upstream
>> changed yyin and yyout from pointers to references:
>>
>>
https://github.com/westes/flex/commit/336a1deaa57975f34cd732d656d1c0cbe3d5233a
>>
>>
>>
>>
Unfortunately this can break existing .ll files. They will have to be
patched, but this is made more difficult by having the new version of
flex in 13-CURRENT.
>
> I just checked the upstream and it seems the problem does not
> exist any more after this commit.
>
>
https://sourceforge.net/p/mailfilter/code/ci/52e08609da8133e2cc0acd1961ebc1e1537f0c54
>
>
>
Most applications should have similar fixes because all major
> Linux distros are using Flex 2.6 now.  If you are maintaining such
>  applications, you should update the ports, add devel/flex to
                                                 ^^^^^^^^^^
Sorry, I meant textproc/flex.

Jung-uk Kim

> BUILD_DEPENDS, and set FLEX=${LOCALBASE}/bin/flex for releng/stable
> branches.
>
> In fact, I've waited long enough (3.5 years) to not break existing
>  ports.  I thought we should be fine by now but I guess I was
> wrong. :-(
>
> Please let me know if you need any help.