Thread

Re: Regression with large XML data input

zengman <zengman@halodbtech.com> — 2025-12-25T12:40:01Z

> Alternatively, can you upgrade to libxml2 2.13.3+ which undeprecated
> xmlKeepBlanksDefault?
Hi,

I downloaded the source code of libxml2, compiled it and upgraded to version 2.13.4. It seems that the result is the same. 
I'm wondering whether the default libxml2 provided by different operating systems meets our requirements, 
or if we need to specify a particular version of libxml2 externally?

```
xml.c: In function ‘xml_parse’:
xml.c:1919:25: error: ‘xmlKeepBlanksDefault’ is deprecated [-Werror=deprecated-declarations]
 1919 |                         save_keep_blanks = xmlKeepBlanksDefault(preserve_whitespace ? 1 : 0);
      |                         ^~~~~~~~~~~~~~~~
In file included from xml.c:51:
/usr/include/libxml2/libxml/parser.h:957:17: note: declared here
  957 |                 xmlKeepBlanksDefault    (int val);
      |                 ^~~~~~~~~~~~~~~~~~~~
xml.c:1943:25: error: ‘xmlKeepBlanksDefault’ is deprecated [-Werror=deprecated-declarations]
 1943 |                         xmlKeepBlanksDefault(save_keep_blanks);
      |                         ^~~~~~~~~~~~~~~~~~~~
/usr/include/libxml2/libxml/parser.h:957:17: note: declared here
  957 |                 xmlKeepBlanksDefault    (int val);
      |                 ^~~~~~~~~~~~~~~~~~~~
xml.c:1956:17: error: ‘xmlKeepBlanksDefault’ is deprecated [-Werror=deprecated-declarations]
 1956 |                 xmlKeepBlanksDefault(save_keep_blanks);
      |                 ^~~~~~~~~~~~~~~~~~~~
/usr/include/libxml2/libxml/parser.h:957:17: note: declared here
  957 |                 xmlKeepBlanksDefault    (int val);
      |                 ^~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
make[4]: *** [../../../../src/Makefile.global:970: xml.o] Error 1
make[4]: Leaving directory '/home/postgres/code/postgres/src/backend/utils/adt'
make[3]: *** [../../../src/backend/common.mk:37: adt-recursive] Error 2
make[3]: Leaving directory '/home/postgres/code/postgres/src/backend/utils'
make[2]: *** [common.mk:37: utils-recursive] Error 2
make[2]: Leaving directory '/home/postgres/code/postgres/src/backend'
make[1]: *** [Makefile:42: all-backend-recurse] Error 2
make[1]: Leaving directory '/home/postgres/code/postgres/src'
make: *** [GNUmakefile:11: all-src-recurse] Error 2
postgres@zxm-VMware-Virtual-Platform:~/code/postgres$ xml2-config --version 
2.13.4
```

--
Regards,
Man Zeng
www.openhalo.org