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From: mahendrakar s <mahendrakarforpg@gmail.com>
Date: Fri, 24 Feb 2023 07:29:23 +0530
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 <CABkiuWpS0d24E4rZV9WhWuWM6BBgi3P3pti5seuAgKOkhVJ7TA@mail.gmail.com>
Subject: Re: using libjansson in postgres extension
To: pgsql-novice <pgsql-novice@lists.postgresql.org>, andrew@dunslane.net
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+andrew.
Thoughts?

On Thu, 23 Feb 2023 at 19:08, mahendrakar s <mahendrakarforpg@gmail.com>
wrote:

> Hello Hackers,
>
> I'm developing an extension where in it indirectly references (libjansson)
> and libjansson has a symbol json_object
> <https://github.com/akheron/jansson/blob/master/src/load.c#:~:text=json_t%20*object%20%3D%20json_object()%3B>which
> conflicts with postgres  symbol 'json_object
> <https://github.com/postgres/postgres/blob/master/src/backend/utils/adt/json.c#:~:text=json_object(PG_FUNCTION_ARGS)>
> '.
>
> I see below:
> PostgreSQL: Documentation: 11: 38.10. C-Language Functions
> <https://www.postgresql.org/docs/11/xfunc-c.html#id-1.8.3.13.8>
> "Symbol names defined within object files must not conflict with each
> other or with symbols defined in the PostgreSQL server executable. You will
> have to rename your functions or variables if you get error messages to
> this effect."
>
> But this requires to maintain libjansson with customizations(have a
> different symbol) to meet the needs.
>
> Do you have any suggestions to use the libjansson 'as it is' without using
> the different symbol.
>
> Thanks,
> Mahendrakar.
>
>
>

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<div dir=3D"ltr"><div><a class=3D"gmail_plusreply" id=3D"plusReplyChip-0">+=
andrew.</a><br></div><div>Thoughts?<a class=3D"gmail_plusreply"><br></a></d=
iv><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On =
Thu, 23 Feb 2023 at 19:08, mahendrakar s &lt;<a href=3D"mailto:mahendrakarf=
orpg@gmail.com">mahendrakarforpg@gmail.com</a>&gt; wrote:<br></div><blockqu=
ote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px=
 solid rgb(204,204,204);padding-left:1ex"><div dir=3D"ltr">Hello Hackers,<d=
iv><br></div><div>I&#39;m developing an extension where=C2=A0in it indirect=
ly references (libjansson) and libjansson has a symbol <a href=3D"https://g=
ithub.com/akheron/jansson/blob/master/src/load.c#:~:text=3Djson_t%20*object=
%20%3D%20json_object()%3B" target=3D"_blank">json_object </a>which conflict=
s with postgres=C2=A0 symbol &#39;<a href=3D"https://github.com/postgres/po=
stgres/blob/master/src/backend/utils/adt/json.c#:~:text=3Djson_object(PG_FU=
NCTION_ARGS)" target=3D"_blank">json_object</a>&#39;.</div><div><br></div><=
div>I see below:<br></div><div><a href=3D"https://www.postgresql.org/docs/1=
1/xfunc-c.html#id-1.8.3.13.8" target=3D"_blank">PostgreSQL: Documentation: =
11: 38.10. C-Language Functions</a><br>&quot;Symbol names defined within ob=
ject files must not conflict with each other or with symbols defined in the=
 PostgreSQL server executable. You will have to rename your functions or va=
riables if you get error messages to this effect.&quot;<br></div><div><br><=
/div><div>But this requires to maintain libjansson with customizations(have=
 a different symbol) to meet the needs.<br></div><div><br></div><div>Do you=
 have any suggestions to use the libjansson &#39;as it is&#39; without usin=
g the different symbol.</div><div><br></div><div>Thanks,</div><div>Mahendra=
kar.</div><div><br></div><div><br></div></div>
</blockquote></div></div>

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