[Difx-users] vex2 has landed {External}

[Chris Phillips]

Hi Walter,

I have just submitted a patch to "vex.h" which your update clobbered. To
gex the lexparser to compile on OSX, it needs the compiler definitions I
have just added. These may well be compiler version differences rather than
OSX specific. - in which case it will affect everyone once Linux
distributions move to newer gcc versions (OSX homebrew uses a very recent
version of the gcc suite).

Maybe we should request these get pushed "back" onto the official FS code
base.

Cheers
Chris

On Fri, Jan 28, 2022 at 10:13 AM Walter Brisken via Difx-users <
difx-users at listmgr.nrao.edu> wrote:

>
> Hi DiFX Users,
>
> I have merged the Goddard/NVI vex2 parser and related vex2difx changes
> (which were developed under the vex2 branch over the last several months)
> into the vex2difx trunk.
>
> Behavior for vex1.5 files should remain largely unchanged.  There has been
> a report of an incomplete vex1.5 file that used to work not working
> anymore -- such non-compliant cases are not likely to receive any
> development attention :)
>
> However, if you see any regression when using a valid vex1.5 file, please
> send me all the files needed to run vex2difx and I will work to resolve
> the issue.
>
> Support for new vex2 features in vex2difx is not complete and has not been
> extensively tested -- both due to lack of an adequate supply of vex2 files
> that span the huge space of possible use cases.  Test reports (fails and
> successes) and sample files would be appreciated.  That said, some of the
> critical new features (support for the BITSTREAM and DATASTREAM tables
> that better support Mark5B and VDIF formats) are supported, at least to
> some degree.
>
> The ChangeLog file in the SVN repository has some details on the supported
> features.
>
> The vex2 defining document is available at the NRAO wiki, but note that
> this location is subject to change:
>
> https://safe.nrao.edu/wiki/bin/view/VLBA/Vex2doc
>
>
>         -Walter
>
> -------------------------
> Walter Brisken
> NRAO
> Deputy Assistant Director for VLBA Development
> (505)-234-5912 (cell)
> (575)-835-7133 (office; not useful during COVID times)
>
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