Autotools: Sync CS in ext/pcntl (#15341)

- AC_CHECK_TYPE long list of arguments split into a newline
- Long lists in AC_CHECK_DECLS can be split across multiple lines, even
without

Autotools: Sync CS in ext/pcntl (#15341)

- AC_CHECK_TYPE long list of arguments split into a newline
- Long lists in AC_CHECK_DECLS can be split across multiple lines, even
without m4_normalize, but the end quote needs to be done properly
after the last item without space or newline. Here the m4_normalize
ensures all trailing blanks are trimmed and having the possibility to
put the ending quotes on newlines also

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Autotools: Replace AC_MSG_ERROR with AC_MSG_FAILURE (#15209)

This replaces the AC_MSG_ERROR with AC_MSG_FAILURE, where appropriate.

The AC_MSG_ERROR outputs given message and exits

Autotools: Replace AC_MSG_ERROR with AC_MSG_FAILURE (#15209)

This replaces the AC_MSG_ERROR with AC_MSG_FAILURE, where appropriate.

The AC_MSG_ERROR outputs given message and exits the configure step. The
AC_MSG_FAILURE does the same but also automatically outputs additional
message "See 'config.log' for more details." which might help directing
the user where to look further.

The AC_MSG_ERROR is used for errors where current test step isn't logged
in the config.log and wouldn't make sense, and AC_MSG_FAILURE is mostly
used in cases of library checks, compilation tests, headers checked with
AC_CHECK_HEADER* and similar tests that are also logged in the
config.log.

AC_MSG_ERROR([Sanity check failed.]) output:

```
configure: error: Sanity check failed.
```

AC_MSG_FAILURE([Sanity check failed.]) output:

```
configure: error: in '/path/to/php-src':
configure: error: Sanity check failed.
See 'config.log' for more details
```

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Sync AC_DEFINE help texts (#15207)

Autotools: Normalize and quote all PHP_NEW_EXTENSION arguments (#15144)

This adds Autoconf quote characters to all PHP_NEW_EXTENSION arguments
and syncs the CS across the php-src Autotoo

Autotools: Normalize and quote all PHP_NEW_EXTENSION arguments (#15144)

This adds Autoconf quote characters to all PHP_NEW_EXTENSION arguments
and syncs the CS across the php-src Autotools build system.

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ext/pcntl: Added new function pcntl_waitid

to obtain status information pertaining termination, stop, and/or
continue events in one the caller's child processes.

close GH-14617

Check ext/pcntl required functions with for loop (#14302)

This omits defining redundant HAVE_<function> symbols since these are
used unconditionally in ext/pcntl.

* HAVE_FORK is

Check ext/pcntl required functions with for loop (#14302)

This omits defining redundant HAVE_<function> symbols since these are
used unconditionally in ext/pcntl.

* HAVE_FORK is defined via ext/standard/config.m4
* HAVE_SIGACTION is defined via Zend.m4
* HAVE_WAITPID symbol is removed

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Wrap sched_getcpu AC_RUN_IFELSE check in AC_CACHE_CHECK (#14336)

For cross-compiling configuration, this wraps the check with the
php_cv_func_sched_getcpu variable.

Simplify required functions checks in ext/pcntl (#14288)

ext/pcntl: cpu affinity support for solaris/illumos. (#14199)

ext/pcntl: add pcntl_getcpu support for solaris.

using getcpuid having similar signature too.

close GH-14188

ext/pcntl: pcntl_getqos_class/pcntl_setqos_class addition.

Introducting macOs Quality Of Service through those two calls.
on macOs arm64/M*, there is no concept of individual cores, thus

ext/pcntl: pcntl_getqos_class/pcntl_setqos_class addition.

Introducting macOs Quality Of Service through those two calls.
on macOs arm64/M*, there is no concept of individual cores, thus
the old thread policy for cpu affinity does not work here.
Instead, the user can apply to the current process the level of
performance/energy consumption they wish from the highest
QosClass::UserInteractive to QosClass::Background.

Close GH-13945

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ext/pcntl: adding pcntl_getcpu.

using sched_getcpu under the hood (Linux and FreeBSD).
Returns the current cpu id for the current process.
For Linux, we need to see beyond the sole p

ext/pcntl: adding pcntl_getcpu.

using sched_getcpu under the hood (Linux and FreeBSD).
Returns the current cpu id for the current process.
For Linux, we need to see beyond the sole presence of the symbol
to consider it.
Mostly useful, for now, in the cpu affinity context since
the os can migrate processes as it sees fits otherwise.

Clos GH-13908

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ext/pcntl: cpu affinity api introduction.

For now, working on Linux, FreeBSD >= 13.x and DragonFlyBSD.
Handy wrapper to assign an array of cpu ids or to retrieve the cpu ids
assigned

ext/pcntl: cpu affinity api introduction.

For now, working on Linux, FreeBSD >= 13.x and DragonFlyBSD.
Handy wrapper to assign an array of cpu ids or to retrieve the cpu ids
assigned to a given process.

pcntl_setaffinity inserts valid unique cpu ids (within the range of available
cpus).

Close GH-13893

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ext/pcntl: adding pcntl_setns for Linux >= 5.3

allows a given process to join an existing Linux namespace, relatively
complementary to the existing pcntl_unshare.

Close GH-13878

Use Autoconf AC_CHECK_TYPE for checking siginfo_t (#13389)

The siginfo_t is defined by including the signal.h. Some systems include
the siginfo.h in the signal.h. Including it separately

Use Autoconf AC_CHECK_TYPE for checking siginfo_t (#13389)

The siginfo_t is defined by including the signal.h. Some systems include
the siginfo.h in the signal.h. Including it separately is obsolete on
current systems.

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pcntl add forkx for solaris based systems. (#7654)

pcntl: Adding pcntl_rfork support.

Simplify functions checks in m4

- AC_CHECK_FUNCS already automatically defines belonging HAVE_function
symbols and executes given shell code.

Sync functions checks

Removed unused checks:
- mbsinit check removed, HAVE_MBSINIT removed (not used in php-src)
- mempcpy check removed, HAVE_MEMPCPY removed (not used in php-src an

Sync functions checks

Removed unused checks:
- mbsinit check removed, HAVE_MBSINIT removed (not used in php-src)
- mempcpy check removed, HAVE_MEMPCPY removed (not used in php-src anymore since
560ed89bfbb56526251e9bd2fbcb27e5932641d8 which uses PHP's own implementation)
- strpncpy check removed, added via a8c9e893b6911c785f698d724b2ff61e7aebb737 and
not used.
- setpgid check removed since HAVE_SETPGID is not used

Moved to a central configure.ac:
- fpclass
- mbrlen moved to configure.ac (since the HAVE_MBRLEN is used accross the php-src)
- sigprocmask
- getcwd
- getwd
- glob
- strfmon
- nice

Duplicated checks removed:
- gethostname
- getlogin
- getpwuid_r
- socketpair

- mprotect check simplified

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Normalize comments in *nix build system m4 files

Normalization include:
- Use dnl for everything that can be ommitted when configure is built in
favor of the shell comment characte

Normalize comments in *nix build system m4 files

Normalization include:
- Use dnl for everything that can be ommitted when configure is built in
favor of the shell comment character # which is visible in the output.
- Line length normalized to 80 columns
- Dots for most of the one line sentences
- Macro definitions include similar pattern header comments now

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Switch to use ZTS cache

Add AS_HELP_STRING to *nix build configure options

The Autoconf's default AS_HELP_STRING macro can properly format help
strings [1] so watching out if columns are aligned manually is not

Add AS_HELP_STRING to *nix build configure options

The Autoconf's default AS_HELP_STRING macro can properly format help
strings [1] so watching out if columns are aligned manually is not
anymore.

[1] https://www.gnu.org/software/autoconf/manual/autoconf.html#Pretty-Help-Strings

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Implement pcntl_unshare

Replace obsolete AC_TRY_FOO with AC_FOO_IFELSE

Autoconf 2.50 released in 2001 made several macros obsolete including
the AC_TRY_RUN, AC_TRY_COMPILE and AC_TRY_LINK:
http://git.savann

Replace obsolete AC_TRY_FOO with AC_FOO_IFELSE

Autoconf 2.50 released in 2001 made several macros obsolete including
the AC_TRY_RUN, AC_TRY_COMPILE and AC_TRY_LINK:
http://git.savannah.gnu.org/cgit/autoconf.git/tree/ChangeLog.2

These macros should be replaced with the current AC_FOO_IFELSE instead:
- AC_TRY_RUN with AC_RUN_IFELSE and AC_LANG_SOURCE
- AC_TRY_LINK with AC_LINK_IFELSE and AC_LANG_PROGRAM
- AC_TRY_COMPILE with AC_COMPILE_IFELSE and AC_LANG_PROGRAM

PHP 5.4 to 7.1 require Autoconf 2.59+ version, PHP 7.2 and above require
2.64+ version, and the PHP 7.2 phpize script requires 2.59+ version which
are all greater than above mentioned 2.50 version therefore systems
should be well supported by now.

This patch was created with the help of autoupdate script:
autoupdate <file>

Reference docs:
- https://www.gnu.org/software/autoconf/manual/autoconf-2.69/html_node/Obsolete-Macros.html
- https://www.gnu.org/software/autoconf/manual/autoconf-2.59/autoconf.pdf

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Remove unused Git attributes ident

The $Id$ keywords were used in Subversion where they can be substituted
with filename, last revision number change, last changed date, and last
use

Remove unused Git attributes ident

The $Id$ keywords were used in Subversion where they can be substituted
with filename, last revision number change, last changed date, and last
user who changed it.

In Git this functionality is different and can be done with Git attribute
ident. These need to be defined manually for each file in the
.gitattributes file and are afterwards replaced with 40-character
hexadecimal blob object name which is based only on the particular file
contents.

This patch simplifies handling of $Id$ keywords by removing them since
they are not used anymore.

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