Fix FPM ACL build check on MacOS

MacOS has got ACL support but without user/group support.

sapi/fpm/config.m4: check for libapparmor's aa_change_profile()

The fpm code actually uses aa_change_profile(), not change_hat(). Test
for the correct function. (libapparmor always has b

sapi/fpm/config.m4: check for libapparmor's aa_change_profile()

The fpm code actually uses aa_change_profile(), not change_hat(). Test
for the correct function. (libapparmor always has both, so this is just
a correctness fix.)

Closes GH-6037.

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sapi/fpm/config.m4: add a new --with-fpm-apparmor configure flag.

The existing AC_FPM_APPARMOR macro (which is always run when FPM is
enabled) checks for the existence of libapparmor, an

sapi/fpm/config.m4: add a new --with-fpm-apparmor configure flag.

The existing AC_FPM_APPARMOR macro (which is always run when FPM is
enabled) checks for the existence of libapparmor, and adds it to $LIBS
if found. The result is an "automagic" dependency on libapparmor that
depends not only on the user's configuration, but also on the build
host's environment.

In particular, this can cause problems if the user just happens to
have libapparmor installed (for testing or development) when he builds
PHP. Later, he may remove libapparmor, not realizing that PHP depends
on it. At that point, FPM will cease to work due to the missing library.

This commit adds a new configure flag called "--with-fpm-apparmor",
defaulting to "no", that enables or disables the feature. The new flag
is used to signal the user's intent; whether or not he wants to use
AppArmor. If he does, then we still check for the existence and
usability of libapparmor; however, it is now an error for the library
to be missing when --with-fpm-apparmor is requested.

Gentoo-bug: https://bugs.gentoo.org/637402
PHP-bug: https://bugs.php.net/bug.php?id=75519

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Link executable files using non PIC object files. This reduces PIC overhead and improves performance.

Remove AC_FPM_POLL

AC_FPM_POLL defines HAVE_POLL symbol which is already checked by
configure.ac and function poll in AC_CHECK_FUNCTIONS.

Closes GH-4449

Clean headers checks

Some headers were checked multiple times in the main configure.ac file
and in the bundled extensions or SAPIs themselves. Also many of these
checks are then used

Clean headers checks

Some headers were checked multiple times in the main configure.ac file
and in the bundled extensions or SAPIs themselves. Also many of these
checks are then used accross other extensions or SAPIs so a central
configure.ac makes most sense for these checks.

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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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Use PKG_CHECK_MODULES to detect the systemd library

Always use pkg-config from the host architecture

Clean build system

Changes:
- AC_TYPE_SIZE_T called on only one place (configure.ac)
- AC_FUNC_ALLOCA called on only one place (configure.ac)
- AC_TYPE_UID_T called on only one p

Clean build system

Changes:
- AC_TYPE_SIZE_T called on only one place (configure.ac)
- AC_FUNC_ALLOCA called on only one place (configure.ac)
- AC_TYPE_UID_T called on only one place (configure.ac)
- HAVE_STRSTR removed since strstr is part of C89 standard [1]
- Remove checks for strtol and strpbrk
- Checking for the presence of perror function is not needed anymore
since it is part of C89 standard and PHP calls it unconditionally.
- Checking for functions strdup, setenv, strerror, and memmove done only
on one place (configure.ac)
- outdated check for snprintf removed

1: https://port70.net/~nsz/c/c89/c89-draft.html

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Fixed ZTS cache usage

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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Remove HAVE_STDIO_H

The `<stdio.h>` header file is part of the standard C89 headers [1]
and on current systems can be included unconditionally.

Since PHP requires at least C89 o

Remove HAVE_STDIO_H

The `<stdio.h>` header file is part of the standard C89 headers [1]
and on current systems can be included unconditionally.

Since PHP requires at least C89 or greater, the `HAVE_STDIO_H` symbol
defined by Autoconf [2] can be ommitted and simplifed.

Refs:
[1] https://port70.net/~nsz/c/c89/c89-draft.html#4.1.2
[2] https://git.savannah.gnu.org/cgit/autoconf.git/tree/lib/autoconf/headers.m4

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Remove HAVE_STDLIB_H

The C89 and later standard defines the `<stdlib.h>` header as part of
the standard headers [1] and on current systems it is always present
and the `HAVE_STDLIB_H

Remove HAVE_STDLIB_H

The C89 and later standard defines the `<stdlib.h>` header as part of
the standard headers [1] and on current systems it is always present
and the `HAVE_STDLIB_H` symbol can be removed.

Also Autoconf suggests doing this and relying on C89 or above [2] and [3].

[1] https://port70.net/~nsz/c/c89/c89-draft.html#4.1.2
[2] http://git.savannah.gnu.org/cgit/autoconf.git/tree/lib/autoconf/headers.m4
[3] https://www.gnu.org/software/autoconf/manual/autoconf-2.69/autoconf.html

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Remove not needed checking for <errno.h>

Header `<errno.h>` is part of the standard C89 headers [1] and on
current systems checking is not need anymore since PHP requires at
least C8

Remove not needed checking for <errno.h>

Header `<errno.h>` is part of the standard C89 headers [1] and on
current systems checking is not need anymore since PHP requires at
least C89. This is noted also by Autoconf itself in the docs and
code [2].

The Autoconf check defined the `HAVE_ERRNO_H` symbol when building PHP
with sockets extension or fpm sapi. This symbol is not utilized across
the PHP source code except in the current version of bundled GD library
which has worked ok so far also with sockets extension or fpm sapi
disabled anyway.

Refs:
[1] https://port70.net/~nsz/c/c89/c89-draft.html#4.1.2
[2] https://git.savannah.gnu.org/cgit/autoconf.git/tree/lib/autoconf/headers.m4

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fpm process name, FreeBSD 12.x using new setproctitle_fast

Fix AC_RUN_IFELSE calls when cross-compiling

AC_RUN_IFELSE program can't be run when cross-compiling. This fix removes
warnings given by autotools scripts.

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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Trim trailing whitespaces in build files

Some editors utilizing .editorconfig automatically trim whitespaces. For
convenience this patch removes whitespaces in certain build files:
-

Trim trailing whitespaces in build files

Some editors utilizing .editorconfig automatically trim whitespaces. For
convenience this patch removes whitespaces in certain build files:
- ext/*/config*.m4
- configure.ac
- acinclude.m4

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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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Support using acl_* functions on *BSD

The *BSD systems have ACL routines built-in in libc rather than
in separate libacl. Update the configure check to detect that and enable
ACL sup

Support using acl_* functions on *BSD

The *BSD systems have ACL routines built-in in libc rather than
in separate libacl. Update the configure check to detect that and enable
ACL support without adding 'acl' library.

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Merge branch 'PHP-5.6' into PHP-7.0

* PHP-5.6:
Fixed bug #61751 (SAPI build problem on AIX: Undefined symbol: php_register_internal_extensions)

Conflicts:
sapi/cg

Merge branch 'PHP-5.6' into PHP-7.0

* PHP-5.6:
Fixed bug #61751 (SAPI build problem on AIX: Undefined symbol: php_register_internal_extensions)

Conflicts:
sapi/cgi/config9.m4
sapi/fpm/config.m4

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Fixed bug #61751 (SAPI build problem on AIX: Undefined symbol: php_register_internal_extensions)

FIx darwin build

Only link fastcgi into fpm and cgi