When AC_DEFINE is called after some macro that has already defined the
symbol with description (help text), it can be called with two arguments
to make things easier.
[ci skip]
On some systems (Haiku) the math library is part of the C library and it
doesn't need to be explicitly prepended to LIBS. The redundant HAVE_LIBM
symbol defined by the AC_CHECK_LIB has been removed.
AC_SEARCH_LIBS can be used to check for dlopen and if dl library needs
to be prepended to LIBS. The dlsym is available with the same scope as
dlopen (if dlopen is present, also dlsym is). The redundant HAVE_DLOPEN
and HAVE_DLSYM symbols have been removed.
This never resulted in a working XPath object anyway, as trying to query
or evaluate anything resulted in an "Invalid XPath context" error.
Supporting this is more trouble than it's worth, so just block the clone
operation.
Method to quote strings in XPath, similar to PDO::quote() / mysqli::real_escape_string.
Sample usage: $xp->query("//span[contains(text()," . $xp->quote($string) . ")]")
The algorithm is derived from Robert Rossney's research into XPath quoting published at https://stackoverflow.com/a/1352556/1067003
But using an improved implementation I wrote myself, originally for https://github.com/chrome-php/chrome/pull/575
The union semun is always defined in php-src code. Current systems
require user to define it manually as done in the ext/sysvsem/sysvsem.c.
The conditional checks for HAVE_SEMUN were unused. The PHP 3.0.12 AIX
bug bugs.php.net/2149 was fixed by the removal of __GNU_LIBRARY__ check,
so this now further simplifies the code. The Autoconf AC_CHECK_TYPES
checks if system by any chance has the union semun, and by default
defines the HAVE_UNION_SEMUN.
Note 16 is now EOL, so old GitHub Actions that use node 16 now triggers a warning.
This updates all existing workflows except `dwieeb/needs-reply` to their latest versions.
The AC_CHECK_FUNCS checks whether the linker sees the function in the
usual libraries, in this case libc. This is a simple trick to also check
existence of belonging headers, since the code uses HAVE_PRCTL and
HAVE_PROCCTL to include headers and call functions.
The `phpinfo()` section of the Curl extension lists individual features
supported by the particular ext-Curl + libcurl build. However, the
`curl_version()` function return values do not indicate the same level of
details.
`curl_version()` has a `protocols` key that returns an array of all protocols
supported by the build. But the `features` key is a bitmask of all the features.
Checking the availability of certain feature requires knowing the corresponding
`CURL_VERSION` constant, and checking the availability of the constant and a
bitmask check for it in the `features` value.
For example, to determine HTTP2 support, it requires evaluating:
```php
defined('CURL_VERSION_HTTP2') && (curl_version()['features'] & CURL_VERSION_HTTP2 === CURL_VERSION_HTTP2)
```
To make feature availability checks more intuitive, this adds a new
`feature_list` key to `curl_version()` output array.
With it, checking for individual features availability is easier, and does
not require inspecting the availability of the `CURL_VERSION` constant and
the `features` key.
```php
!empty(curl_version()['feature_list']['HTTP2']);
```
Niels Dossche