Обсуждение: libxml2 is dropping xml2-config
Debian reports that libxml2 is dropping the xml2-config binary: Date: Mon, 20 Jan 2020 20:42:47 +0100 From: Mattia Rizzolo <mattia@debian.org> Reply-To: Mattia Rizzolo <mattia@debian.org>, 949428@bugs.debian.org Subject: Bug#949428: postgresql-12: FTBFS with libxml2 2.9.10 (uses xml2-config) Source: postgresql-12 Version: 12.1-2 Severity: important Tags: ftbfs User: libxml2@packages.debian.org Usertags: ftbfs-2.9.10 xml2-config Dear maintainer, your package is using `xml2-config` to detect and use libxml2. I'm removing that script, so please update your build system to use pkg-config instead. The libxml2 package in experimental already doesn't ship the xml2-config script. Attached is the full build log, hopefully relevant excerpt follows: checking for xml2-config... no ... configure: error: header file <libxml/parser.h> is required for XML support [...] ----- End forwarded message ----- Luckily the ./configure script is compatible enough so that this hack works: (tested on master) ./configure --with-libxml XML2_CONFIG='pkg-config libxml-2.0' [...] checking for XML2_CONFIG... pkg-config libxml-2.0 [...] checking for xmlSaveToBuffer in -lxml2... yes [...] checking libxml/parser.h usability... yes checking libxml/parser.h presence... yes checking for libxml/parser.h... yes We should teach configure.in to recognize that natively as well, I guess. Christoph
Re: To PostgreSQL Hackers 2020-01-20 <20200120204715.GA73984@msg.df7cb.de> > Debian reports that libxml2 is dropping the xml2-config binary: Please disregard that, I had assumed this was a change made by libxml2 upstream. I'm in contact with the libxml2 Debian maintainer to get that change off the table. > We should teach configure.in to recognize that natively as well, I > guess. (Putting in support for pkg-config still makes sense, though.) Christoph
Christoph Berg <myon@debian.org> writes:
> Re: To PostgreSQL Hackers 2020-01-20 <20200120204715.GA73984@msg.df7cb.de>
>> Debian reports that libxml2 is dropping the xml2-config binary:
> Please disregard that, I had assumed this was a change made by libxml2
> upstream. I'm in contact with the libxml2 Debian maintainer to get
> that change off the table.
I was wondering about that --- I had thought libxml2 upstream was
not terribly active anymore.
> (Putting in support for pkg-config still makes sense, though.)
Perhaps. Are there any platforms where libxml2 doesn't install a
pkg-config file? What are we supposed to do if there's no pkg-config?
(The workaround we have for that with ICU is sufficiently bletcherous
that I'm not eager to replicate it for libxml2...)
regards, tom lane
On 1/20/20 5:51 PM, Tom Lane wrote: > Christoph Berg <myon@debian.org> writes: >> Re: To PostgreSQL Hackers 2020-01-20 <20200120204715.GA73984@msg.df7cb.de> >>> Debian reports that libxml2 is dropping the xml2-config binary: > > Perhaps. Are there any platforms where libxml2 doesn't install a > pkg-config file? What are we supposed to do if there's no pkg-config? > (The workaround we have for that with ICU is sufficiently bletcherous > that I'm not eager to replicate it for libxml2...) Yes -- at least Ubuntu < 18.04 does not install pkg-config for libxml2. I have not checked Debian yet, but I imagine < 8 will have the same issue. RHEL/CentOS 6/7 look OK and I'm betting 8 is OK as well. So, based on my limited testing thus far it is not universally supported, even on non-EOL distros. Christoph, are you saying we perhaps won't need to make this change? Regards, -- -David david@pgmasters.net
Re: Tom Lane 2020-01-21 <6994.1579567876@sss.pgh.pa.us> > > (Putting in support for pkg-config still makes sense, though.) > > Perhaps. Are there any platforms where libxml2 doesn't install a > pkg-config file? What are we supposed to do if there's no pkg-config? I can't comment on the libxml2 part, but making pkg-config a hard requirement to build PG would probably be a safe bet nowadays. (I'm still not arguing that we should.) Re: David Steele 2020-01-21 <95349047-31dd-c7dc-df17-b488c2d3441f@pgmasters.net> > Yes -- at least Ubuntu < 18.04 does not install pkg-config for libxml2. I > have not checked Debian yet, but I imagine < 8 will have the same issue. That is not true, I just verified that both 16.04 and 14.04 (already EOL) have a working `pkg-config libxml-2.0 --libs`. > Christoph, are you saying we perhaps won't need to make this change? I'm saying that the Debian libxml2 maintainer shouldn't try to make this change unilaterally without libxml2 upstream. Christoph
On 1/23/20 7:09 AM, Christoph Berg wrote: > Re: David Steele 2020-01-21 <95349047-31dd-c7dc-df17-b488c2d3441f@pgmasters.net> >> Yes -- at least Ubuntu < 18.04 does not install pkg-config for libxml2. I >> have not checked Debian yet, but I imagine < 8 will have the same issue. > > That is not true, I just verified that both 16.04 and 14.04 (already > EOL) have a working `pkg-config libxml-2.0 --libs`. You are correct. My build script was not explicitly installing pkg-config on <= 16.04. 12.04 also seems to work fine. Regards, -- -David david@pgmasters.net