As described in autoconf-archive upstream [1], from where
`build/ax_gcc_func_attribute.m4` is forked, the old unknown func attr
detection method would throw a false negative anytime an unrelated
warning was raised.
This results in `ax_cv_have_func_attribute_target` being set to `no`
whenever certain compiler Warning flags are switched on. Namely, having
`-Wall` on, which is a default CFLAG for some linux distributions, will
result in
```
warning: ‘bar’ declared ‘static’ but never defined [-Wunused-function]
```
when evaluating support for the `target` function attribute.
With that configuration value set to `no`, the compiled php binaries
will not support x86_64 v3 instructions such as avx2 and sse2, which
should speed up specific tasks ran by PHP.
This issue was originally reported in Ubuntu [2].
[1] http://git.savannah.gnu.org/gitweb/?p=autoconf-archive.git;a=commitdiff;h=df0894ad1a8195df67a52108b931e07d708cec9a
[2] https://bugs.launchpad.net/ubuntu/+source/php8.1/+bug/1882279
Closes GH-8483.
When legacy arginfo is generated, all the type info gets lost. Since this task is performed before any other additional functionalities of gen_stub.php (e.g. verification, method synopsis and class synopsis generation), these fail as they would require the missing type information.
The issue is fixed by deep cloning the file info objects (albeit only their affected properties), so that we use those for legacy arginfo generation, leaving the original ones untouched.
We have to generate <ooclass> elements for interfaces (rather than <oointerface>) in a number of places: directly inside the <classsynopsis> element and in the extends list.
This change was originall only done for 'master'. Xdebug bundles this file as
it requires it, but PHP 7.2/7.3 don't have it bundled. By doing "phpize" with
master, it updates the file introducing a local diff. By fixing it in older
versions, that problem goes away.
This changes ClassInfo::createIncludeElement() such that it takes the $query
argument as-is for the xpointer attribute value. Special characters, like
" and &, are used as-is so be careful not to break the resulting XML.
