Fail early in *nix configuration build script

Adding two exit early safeguards in the *nix configuration build script:

1) Given the initial cd into the build tree fails (the project

Fail early in *nix configuration build script

Adding two exit early safeguards in the *nix configuration build script:

1) Given the initial cd into the build tree fails (the project root),
the `buildconf` script exits with non-zero status (failure).
2) Given the grep command does not exist or `configure.ac` AC_INIT [1]
expectations are unmet, the buildconf script exits non-zero.

Additionally quoting the pathname to cd into and the empty CD_PATH
parameter for portability, also for systems that are using a
non-portable pathname [2] for the build tree.

The initial CD safeguard has been applied to the `buildconf` and
four more scripts:

- build/genif.sh
- scripts/dev/credits
- scripts/dev/genfiles
- scripts/dev/makedist

Rationale:

Cd-ing into the project root should always prematurely exit w/ FAILURE
as a required precondition for its invocation has not been met. This
should never go unnoticed as it always requires user intervention.

Similar and more specifically to the PHP build on *nix systems, the
grep command is required early to obtain the `php_extra_version` from
configure.ac. Previously, if the grep command is missing (or failing
due to not matching the line with the AC_INIT macro [1]), the internal
dev parameter would always be zero (0) which can easily result in the
situation that the configure script is not being rebuilt. This is
cumbersome as the rebuild of a configure script is more likely required
with checked-out dev versions under change rather than an already
properly set-up build environment on a dedicated build or release
system. Missing the fact that either the grep utility is missing or
the expectation of having the AC_INIT macro in configure.ac is unmet
should never go unnoticed as it always requires user intervention.

[1]: https://www.gnu.org/software/autoconf/manual/autoconf-2.67/html_node/Initializing-configure.html
[2]: https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap03.html#tag_03_271

Closes GH-16717.

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Handle BSD checksum and file utilities (#14690)

* Handle BSD checksum utilities

The BSDs have different checksum utilities than GNU systems do. If we
don't see the GNU checksum

Handle BSD checksum and file utilities (#14690)

* Handle BSD checksum utilities

The BSDs have different checksum utilities than GNU systems do. If we
don't see the GNU checksum utilities installed, use the BSD ones, as
their output is compatible enough.

Addresses part of GH-14688.

* Prefer GNU touch

BSD touch at least in macOS does not handle local timezone in the
timestamp (like 2024-06-27T10:26:23-03:00). As such, try GNU touch (as
ports systems almost always prefix with g if coreutils is installed) and
prefer that if available. It's not the end of the world though if GNU
touch isn't available, as BSD touch on some systems may support it, and
if it doesn't, then it's just timestamps, nothing too serious.

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makedist: Reset tar timestamps to the commit date (#13879)

This change should make the underlying `.tar` archive fully reproducible (given
identical tool versions).

makedist: Use fixed sort in generated tarball (#10615)

Instead of some undefined order, the files will now be includes in alphabetical
order to make the tarball more reproducible.

makedist: Use fixed owner/group in generated tarball (#10613)

This reduces the amount of system-dependent data within the tarball and makes
it more reproducible. Instead of the informati

makedist: Use fixed owner/group in generated tarball (#10613)

This reduces the amount of system-dependent data within the tarball and makes
it more reproducible. Instead of the information of the release manager that
generates the tarball, the tarball will include the fixed 0:0 value as
owner:group.

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Ensure tar is not bsdtar

Use gtar if it's in the PATH

Removed mentions of git.php.net from the documentation

ensure all files have same date in official archives

Enhance makedist script

This enhances the makidst script:
- integrate both snapshot and makedist scripts together
- add help and options
- generated files are created in the php-

Enhance makedist script

This enhances the makidst script:
- integrate both snapshot and makedist scripts together
- add help and options
- generated files are created in the php-src repository directly
- other minor enhancemenets such as CS fixes
- functionality moved from the Makefile to only shell script
- Add missed patching of the Zend Parsers to the main build step
- Add all *.tmp files to gitignore

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Simplify checking of *nix build tools

The buildmk.stamp file has been created by the *nix build checking step
to run the check step only once. Instead of poluting the project root
di

Simplify checking of *nix build tools

The buildmk.stamp file has been created by the *nix build checking step
to run the check step only once. Instead of poluting the project root
directory, the stamp file can be also omitted. Performance difference is
very minimal to not justify having the stamp check at all today anymore.

This patch integrates the buildcheck.sh to buildconf script directly.

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Refactor PHP_PROG_BISON and PHP_PROG_RE2C

This patch refactors these macros to also checks for the required given
versions of bison and re2c.

- PHP_PROG_RE2C and PHP_PROG_BISON

Refactor PHP_PROG_BISON and PHP_PROG_RE2C

This patch refactors these macros to also checks for the required given
versions of bison and re2c.

- PHP_PROG_RE2C and PHP_PROG_BISON take optional args - minmimum version
required, and bison also excluded versions.
- Instead of caching values this uses manual checking and messaging
outputs.
- It looks like the minimum version of RE2C 0.13.4 is working ok so far.

The genfiles script improvements:
- Add make override in genfiles
- Move checkings from makedist to genfiles
- Refactored output messages
- Various minor enhancements

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Leave bundled generated files untouched

When building lexer and parser files leave bundled files untouched as
are tracked in the Git. *.orig files also don't need to be cleaned
anymo

Leave bundled generated files untouched

When building lexer and parser files leave bundled files untouched as
are tracked in the Git. *.orig files also don't need to be cleaned
anymore.

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Move distribution generator script to scripts/dev

The more proper place for shell scripts dedicated for development, and
releasing PHP should be the scripts/dev directory. Having a clean

Move distribution generator script to scripts/dev

The more proper place for shell scripts dedicated for development, and
releasing PHP should be the scripts/dev directory. Having a cleaner root
project directory helps find the main README.md and files relevant to
install PHP.

These scripts are also used by the release managers mostly who create
release packages and aren't used often by the majority of developers
working on and installing PHP.

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