ext/iconv/config.m4: add missing stdio.h include.

The next generation of C compilers is going to enforce the C standard
more strictly:

https://wiki.gentoo.org/wiki/Modern_C_po

ext/iconv/config.m4: add missing stdio.h include.

The next generation of C compilers is going to enforce the C standard
more strictly:

https://wiki.gentoo.org/wiki/Modern_C_porting

One warning that will eventually become an error is
-Wimplicit-function-declaration. This is relatively easy to catch in
most code (it will fail to compile), but inside of autoconf tests it
can go unnoticed because many feature-test compilations fail by
design. For example,

AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <iconv.h>]],
[[iconv_ccs_init(NULL, NULL);]])]...

is designed to fail if iconv_ccs_init() is not in iconv.h. On the
other hand,

AC_RUN_IFELSE([AC_LANG_SOURCE([[
#include <iconv.h>
int main() {
printf("%d", _libiconv_version);
return 0;
}

should pass if _libiconv_version is defined. If the user has
-Werror=implicit-function-declaration in his CFLAGS, however,
it will not:

$ export CFLAGS="$CFLAGS -Werror=implicit-function-declaration"
$ ./configure
...
checking if using GNU libiconv... no

This is because the stdio.h header that defines printf() is missing:

conftest.c:240:3: error: implicit declaration of function 'printf'
[-Werror=implicit-function-declaration]
240 | printf("%d", _libiconv_version);
| ^~~~~~
conftest.c:239:1: note: include '<stdio.h>' or provide a declaration
of 'printf'

This commit adds the include, correcting the test with any compiler
that balks at implicit function definitions.

Closes GH-10751

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*/*.m4: update main() signatures.

The next generation of C compilers is going to enforce the C standard
more strictly:

https://wiki.gentoo.org/wiki/Modern_C_porting

O

*/*.m4: update main() signatures.

The next generation of C compilers is going to enforce the C standard
more strictly:

https://wiki.gentoo.org/wiki/Modern_C_porting

One warning that will soon become an error is -Wstrict-prototypes.
This is relatively easy to catch in most code (it will fail to
compile), but inside of autoconf tests it can go unnoticed because
many feature-test compilations fail by design. For example,

$ export CFLAGS="$CFLAGS -Werror=strict-prototypes"
$ ./configure
...
checking if iconv supports errno... no
configure: error: iconv does not support errno

(this is on a system where iconv *does* support errno). If errno
support were optional, that test would have "silently" disabled
it. The underlying issue here, from config.log, is

conftest.c:211:5: error: function declaration isn't a prototype
[-Werror=strict-prototypes]
211 | int main() {

This commit goes through all of our autoconf tests, replacing main()
with main(void). Up to equivalent types and variable renamings, that's
one of the two valid signatures, and satisfies the compiler (gcc-12 in
this case).

Fixes GH-10751

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Merge branch 'PHP-7.4' into PHP-8.0

* PHP-7.4:
Make iconv errno support test pass on Solaris.

Merge branch 'PHP-7.3' into PHP-7.4

* PHP-7.3:
Make iconv errno support test pass on Solaris.

Make iconv errno support test pass on Solaris.

Closes GH-6291.

Remove some duplicate iconv path logic

PHP_SETUP_ICONV already adds the include path to INCLUDES and the
library path to SHARED_LIBADD.

Remove PHP_ICONV_H_PATH

Directly include <iconv.h> instead, now that the giconv.h
distinction no longer exists.

Remove giconv support

The best information I was able to find about this is this mail
from 2009 which indicates that giconv is an old FreeBSD iconv
implementation that has long since

Remove giconv support

The best information I was able to find about this is this mail
from 2009 which indicates that giconv is an old FreeBSD iconv
implementation that has long since been superseded by libiconv.

https://lists.samba.org/archive/samba-technical/2009-June/065177.html

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Remove more leftovers of PHP_DEFINE handling

Don't use PHP_DEFINE in iconv

iconv is the only consumer of this custom define mechanism that
puts every define into a single file. Use the standard mechanism
instead.

Drop support for iconv without proper errno setting

It is hard to impossible to work around iconv() implementations which
do not properly set errno according to POSIX. We therefore do n

Drop support for iconv without proper errno setting

It is hard to impossible to work around iconv() implementations which
do not properly set errno according to POSIX. We therefore do no
longer allow to build against such iconv() implementations.

Co-Authored-By: Nikita Popov <nikita.ppv@googlemail.com>

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Merge branch 'PHP-7.3' into PHP-7.4

* PHP-7.3:
Fix #78342: Bus error in configure test for iconv //IGNORE

Merge branch 'PHP-7.2' into PHP-7.3

* PHP-7.2:
Fix #78342: Bus error in configure test for iconv //IGNORE

Fix #78342: Bus error in configure test for iconv //IGNORE

We have to check the return value of iconv_open() for error, to avoid
that and potentially other undesired behavior of iconv().

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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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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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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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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Merge branch 'PHP-5.6'

* PHP-5.6:
fix bad copypaste

fix bad copypaste

Fix #48147 - implement manual handling of //IGNORE for broken libc

Conflicts:
ext/iconv/iconv.c

Fix #48147 - implement manual handling of //IGNORE for broken libc

ext/iconv, ext/json and ext/session use static tsrmls pointer

Fix long-standing visual pain point: the misalignment of './configure help' text.
Whitespace changes and a couple of grammar fixes.