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From: mahendrakar s <[email protected]>
To: pgsql-novice <[email protected]>
Subject: using libjansson in postgres extension
Date: Thu, 23 Feb 2023 19:08:50 +0530
Message-ID: <CABkiuWpifg0tA_odWOXMXcJEQ8ghk3n+amEFB_0Dg33fEmR6TA@mail.gmail.com> (raw)

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_obje...
conflicts with postgres  symbol 'json_object
<https://github.com/postgres/postgres/blob/master/src/backend/utils/adt/json.c#:~:text=json_object(PG...;
'.

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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