How to compile Nginx with zlib-ng

[Lance Dockins]

Thank you, Richard.  I’ll give that a shot.   I already have to do that sort of patching with a variety of other things in the build that I use so that particular adjustment isn’t too bad.

Just for clarity, are you saying that the hash sizes within zlib-ng have increased since Maxim’s last patch for that to accommodate zlib-ng?  That patch was back in 2021 and is part of Nginx core now.
https://mailman.nginx.org/pipermail/nginx-devel/2021-April/013945.html

I think it’s coded to use a 128k hash per that patch.  If the hash size has increased again since that patch, that might justify a bug report to Nginx devel.  Since the code in that patch specifically relates to that error, I thought I’d ask in case you have still been seeing that error with newer Nginx versions that have come out since that patch was implemented.


--
Lance

On Mar 22, 2023 at 5:28 PM -0500, Richard Stanway via nginx <nginx at nginx.org>, wrote:
> I regularly build with zlib-ng, unfortunately it requires patching the zlib-ng files to enable zlib compatibility mode as nginx doesn't seem to have a way to pass options to configure.
>
> Edit "configure" in the zlib-ng directory and change the line compat=0 to compat=1. Then specify --with-zlib=/path/to/zlib-ng in your nginx configure and you should be set.
>
> Be aware that the memory requirements of zlib-ng have changed since support for it was added to nginx, so you will see a lot of "gzip filter failed to use preallocated memory" alerts in your log file when using zlib-ng.
>
>
> > On Wed, 22 Mar 2023 at 15:50, Sergey A. Osokin <osa at freebsd.org.ru> wrote:
> > > Hi Lance,
> > >
> > > thanks for your question.
> > >
> > > Since this is more or less related to nginx development or
> > > new features I'd suggest to use nginx-devel mailing list
> > > instead, thank you.
> > >
> > > On Tue, Mar 21, 2023 at 04:06:00PM -0500, Lance Dockins wrote:
> > > >
> > > > Has anyone had success compiling Nginx with zlib-ng instead of
> > > > default Zlib versions?  I seem to be able to compile Nginx with
> > > > standard Zlib and various other Zlib libraries (e.g. Intel
> > > > optimized or Cloudflare) but compiling with Zlib-NG always fails.
> > >
> > > NGINX builds well with zlib.  In case of new functionality, like
> > > an ability to build with zlib-ng, the source code requires some
> > > patches.
> > >
> > > > I’ve tried passing in various options via with-zlib-opt to try
> > > > to include the —zlib-compat flag for the Zlib NG configure
> > > > directives but no matter what syntax I use, it seems like it
> > > > always fails (whether I have that param or not).  Perhaps I’m
> > > > just struggling with the proper use of Zlib NG in an Nginx
> > > > compile context.
> > > >
> > > > If Nginx should compile with Zlib NG, is there any documentation
> > > > on what params to use in the Nginx compile command to get it to
> > > > work?
> > >
> > > Some ideas can be found inside the zlib-ng project on GH, not
> > > sure is that working solution or not, so you can try.
> > >
> > > I'd also recommend to raise a request in https://trac.nginx.org/nginx/
> > > about this feature request and provide patches for source code
> > > and documentation.
> > >
> > > Thank you.
> > >
> > > --
> > > Sergey A. Osokin
> > > _______________________________________________
> > > nginx mailing list
> > > nginx at nginx.org
> > > https://mailman.nginx.org/mailman/listinfo/nginx
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