Maxim Dounin Wrote:
-------------------------------------------------------
> Hello!
>
> On Wed, Dec 29, 2021 at 11:30:04PM -0500, George wrote:
>
> > Thanks for PCRE2 support!
> >
> > From what I read Nginx 1.21.5 will default to PCRE2 if found or
> fallback to
> > PCRE if not
> >
> > You can disable PCRE2 default by passing --without-pcre2 flag -
> which works
> > fine and
> >
> > ldd $(which nginx)
> >
> > shows
> >
> > libpcre.so.1 => /usr/local/nginx-dep/lib/libpcre.so.1
> (0x00007f86c7445000)
> >
> > But is the same true, if you set --without-pcre flag with PCRE2
> library
> > installed and detected? As that seems to end up with nginx failing
> to
> > configure
> >
> > ./configure: error: the HTTP rewrite module requires the PCRE
> library.
> > You can either disable the module by using
> --without-http_rewrite_module
> > option or you have to enable the PCRE support.
> >
> > Why is it looking for PCRE when PCRE2 is available?
>
> The "--without-pcre" configure option completely disables usage of
> all versions of the PCRE library, both the original PCRE library
> and PCRE2.
>
> Currently there is not option to disable the original PCRE library
> while still using PCRE2. Note though that the original PCRE
> library is not used as long as PCRE2 is available. That is, the
> only potential difference such an option might introduce is what
> happens if PCRE2 is not available: either nginx configure will
> fail, or fallback to using the original PCRE library.
>
> --
> Maxim Dounin
> http://mdounin.ru/
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Thanks Maxim for the clarification :)

So far Nginx 1.21.5 with PCRE2 works fine from my tests with exception of Nginx Lua and ModSecurity Nginx modules being incompatible right now :)