Re: Doubts about libpcre in compilation

["Marco A. Barra Montevechi Filho via Tech-talk" <tech-talk at aps.anl.gov>]

Thanks, Nicole!

It does use regex, but strangely i compiled the IOC without pcre and it worked fine.

Maybe it comes already compiled in most recent versions of streamDevice?

Thanks,

Marco

---

From: NICOLE Remi <remi.nicole at cea.fr>
Sent: 24 March 2023 05:13
To: Marco A. Barra Montevechi Filho <marco.filho at lnls.br>; tech-talk at aps.anl.gov <tech-talk at aps.anl.gov>
Cc: Allan Borgato <allan.borgato at lnls.br>
Subject: Re: Doubts about libpcre in compilation

 

[You don't often get email from remi.nicole at cea.fr. Learn why this is important at https://aka.ms/LearnAboutSenderIdentification ]

As I understand it, the PCRE library is used if your protocol file uses
regular _expression_ for parsing input:

    getRegexTitle {
        out "REGEX_TITLE";
        in "%.1/<title>(.*)<\/title>/"
    }

So, if your protocol files don't use this feature, you should be fine.

This is documented here:

-
https://github.com/paulscherrerinstitute/StreamDevice/blob/e6b2944c/streamApp/regexp.README
- https://paulscherrerinstitute.github.io/StreamDevice/setup.html

Cheers
--
Rémi NICOLE <remi.nicole at cea.fr>
CEA/DRF/IRFU/DIS/LDISC

On Wed, 2023-03-22 at 22:12 +0000, Marco A. Barra Montevechi Filho via
Tech-talk wrote:
> Hello all, i have an areaDetector IOC which im cross-compiling for
> aarch64. The ioc also uses streamDevice 2.8.22 and is being compiled
> in an ubuntu 16.04 container.
>
> I have another ubuntu 16.04 old container in which i compiled it in
> the past, but he configuration of the container is kinda messy and im
> improving things.
>
> I remember i did something ugly in the old container and it has lpcre
> somewhere, but i couldnt find it, although i can recompile the ioc in
> it. I also couldnt solve the compilation issue in the new container
> withapt install libpcre3 libpcre3-dev or anything similar.
>
> So in the new container i just found PROD_SYS_LIBS_DEFAULT += pcre in
> a makefile, commented it and it compiled nicely.
>
> I understand its a lib for regex in perl and streamDevice might use
> it but might already have it out-of-the-box.
>
> My question is: am i breaking my IOC in ways im going to regret? Or
> just getting rid of old dependencies that are not needed anymore?
>
> Thanks for any help,
>
> Marco
>
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