Error found during installation of PHP 8.1 in Ubuntu 24.10 Server

[rochiey]

Description

Since the PPA repository for PHP from ondrej/php have not supported ubuntu 24.10 yet, I compiled and install php from scratch.

Steps to replicate:

1. wget https://www.php.net/distributions/php-8.1.0.tar.bz2
2. tar -xjf php-8.1.0.tar.bz2
3. cd php-8.1.0
4. ./configure --prefix=/usr/local/php --with-config-file-path=/usr/local/php --enable-fpm --with-mysqli --with-openssl --enable-bcmath --with-curl
5. make
6. sudo make install

Error found:

<username>@raspberrypi:~/php-8.1.0$ sudo make install
/bin/bash /home/<username>/php-8.1.0/libtool --silent --preserve-dup-deps --tag CC --mode=compile cc -Iext/libxml/ -I/home/<username>/php-8.1.0/ext/libxml/ -I/home/<username>/php-8.1.0/include -I/home/<username>/php-8.1.0/main -I/home/<username>/php-8.1.0 -I/home/<username>/php-8.1.0/ext/date/lib -I/usr/include/libxml2 -I/home/<username>/php-8.1.0/TSRM -I/home/<username>/php-8.1.0/Zend    -fno-common -Wstrict-prototypes -Wformat-truncation -Wlogical-op -Wduplicated-cond -Wno-clobbered -Wall -Wextra -Wno-strict-aliasing -Wno-unused-parameter -Wno-sign-compare -g -O2 -fvisibility=hidden -Wimplicit-fallthrough=1 -DZEND_SIGNALS   -DZEND_ENABLE_STATIC_TSRMLS_CACHE=1 -c /home/<username>/php-8.1.0/ext/libxml/libxml.c -o ext/libxml/libxml.lo  -MMD -MF ext/libxml/libxml.dep -MT ext/libxml/libxml.lo
/home/<username>/php-8.1.0/ext/libxml/libxml.c: In function ‘php_libxml_shutdown’:
/home/<username>/php-8.1.0/ext/libxml/libxml.c:778:17: warning: ‘xmlRelaxNGCleanupTypes’ is deprecated [-Wdeprecated-declarations]
  778 |                 xmlRelaxNGCleanupTypes();
      |                 ^~~~~~~~~~~~~~~~~~~~~~
In file included from /home/<username>/php-8.1.0/ext/libxml/libxml.c:39:
/usr/include/libxml2/libxml/relaxng.h:124:21: note: declared here
  124 |                     xmlRelaxNGCleanupTypes      (void);
      |                     ^~~~~~~~~~~~~~~~~~~~~~
/home/<username>/php-8.1.0/ext/libxml/libxml.c: In function ‘zif_libxml_use_internal_errors’:
/home/<username>/php-8.1.0/ext/libxml/libxml.c:979:48: warning: comparison of distinct pointer types lacks a cast [-Wcompare-distinct-pointer-types]
  979 |         if (current_handler && current_handler == php_libxml_structured_error_handler) {
      |                                                ^~
/home/<username>/php-8.1.0/ext/libxml/libxml.c:997:49: error: passing argument 2 of ‘xmlSetStructuredErrorFunc’ from incompatible pointer type [-Wincompatible-pointer-types]
  997 |                 xmlSetStructuredErrorFunc(NULL, php_libxml_structured_error_handler);
      |                                                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                                                 |
      |                                                 void (*)(void *, xmlError *) {aka void (*)(void *, struct _xmlError *)}
In file included from /usr/include/libxml2/libxml/valid.h:15,
                 from /usr/include/libxml2/libxml/parser.h:19,
                 from /home/<username>/php-8.1.0/ext/libxml/libxml.c:32:
/usr/include/libxml2/libxml/xmlerror.h:898:57: note: expected ‘xmlStructuredErrorFunc’ {aka ‘void (*)(void *, const struct _xmlError *)’} but argument is of type ‘void (*)(void *, xmlError *)’ {aka ‘void (*)(void *, struct _xmlError *)’}
  898 |                                  xmlStructuredErrorFunc handler);
      |                                  ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~
/home/<username>/php-8.1.0/ext/libxml/libxml.c: In function ‘zif_libxml_get_last_error’:
/home/<username>/php-8.1.0/ext/libxml/libxml.c:1014:15: warning: assignment discards ‘const’ qualifier from pointer target type [-Wdiscarded-qualifiers]
 1014 |         error = xmlGetLastError();
      |               ^
make: *** [Makefile:665: ext/libxml/libxml.lo] Error 1

This error suggests a mismatch between the expected function signature and the actual function being passed to xmlSetStructuredErrorFunc

Workaround:
sudo apt-get install libxml2-dev

And then I have edited 8.1.0/ext/libxml/libxml.c:997 to
xmlSetStructuredErrorFunc(NULL, (xmlStructuredErrorFunc) php_libxml_structured_error_handler);

Re-run sudo make install and then php successfully installed.

PHP Version

8.1.0

Operating System

24.10

[devnexen]

Hi I would suggest to try a more recent version, at least in the 8.2 serie (e.g. 8.2.27) ; that should also fix your issue you re facing.

[rochiey]

Alright seems logical. But for some reason if someone wants to install 8.1 in 24.10, just follow my workaround.