Bison: enable all the warnings and fix them

First, fix 5547d361208d90e12d53bb62bb2ffbbff9b93ca0: the definition of
YFLAGS was not passed into the Makefile: AC_SUBST does not suffice, we

Bison: enable all the warnings and fix them

First, fix 5547d361208d90e12d53bb62bb2ffbbff9b93ca0: the definition of
YFLAGS was not passed into the Makefile: AC_SUBST does not suffice, we
need PHP_SUBST_OLD. While at it, allow to pass variable and value at
the same time.

Then pass -Wall to bison, rather than only -Wempty-rules.

Use %precedence where associativity is useless.

Remove useless %precedence.
GH-5138

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Use "%empty" in the parsers, instead of comments

The annotation %empty is properly enforced: warnings when it's
missing, and errors when it's inappropriate. Support for %empty was
i

Use "%empty" in the parsers, instead of comments

The annotation %empty is properly enforced: warnings when it's
missing, and errors when it's inappropriate. Support for %empty was
introduced in Bison 3.0.

Pass -Wempty-rule to Bison.

Closes GH-5134

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Merge branch 'PHP-7.4'

* PHP-7.4:
Fix bug #79112: IMAP can't find OpenSSL during configure

Fix bug #79112: IMAP can't find OpenSSL during configure

Remove the check of PHP_OPENSSL inside SETUP_OPENSSL. It's the
responsibility of the caller to determine whether they want to

Fix bug #79112: IMAP can't find OpenSSL during configure

Remove the check of PHP_OPENSSL inside SETUP_OPENSSL. It's the
responsibility of the caller to determine whether they want to
enable openssl or not. This makes SSL detection in IMAP work,
which uses a different option.

Additionally also clarify that --with-openssl-dir cannot actually
be used to specify an OpenSSL directory -- these options just
serve as a way to enable OpenSSL in extensions without also
enabling the OpenSSL extension. They need to be renamed to
something clearer in master.

Closes GH-5091.

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Merge branch 'PHP-7.4'

* PHP-7.4:
Revert "Remove configure checks for supported instruction sets"

Revert "Remove configure checks for supported instruction sets"

This reverts commit edccf32f7f36a8bc759b9482737e0c3efcb3a005.

This was reported to cause issues for as yet unknown re

Revert "Remove configure checks for supported instruction sets"

This reverts commit edccf32f7f36a8bc759b9482737e0c3efcb3a005.

This was reported to cause issues for as yet unknown reasons in
bug #78769. As this was intended as code cleanup, revert this from
7.4 at least. May reapply it to master later.

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Merge branch 'PHP-7.4'

* PHP-7.4:
Remove configure checks for supported instruction sets

Remove configure checks for supported instruction sets

These were checking whether the instruction set is supported by
the host CPU, however they were only used to condition on whether

Remove configure checks for supported instruction sets

These were checking whether the instruction set is supported by
the host CPU, however they were only used to condition on whether
this instruction set is targeted at all. It would still use dynamic
dispatch (e.g. based on ifunc resolvers) to select the actual
implementation. Whether the target is guaranteed to support the
instruction set without dispatch is determined based on pre-defined
macros like __SSE2__.

This removes the configure-time builtin cpu checks to remove
confusion. Additionally this allows targeting an architecture that
is newer than the host architecture.

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Fix bug #78681 by renaming libphp8.so to libphp.so

The major version number is no longer included.

Merge branch 'PHP-7.4'

* PHP-7.4:
Add "-pthread" to EXTRA_LDFLAGS_PROGRAM as well

Add "-pthread" to EXTRA_LDFLAGS_PROGRAM as well

Revert "Don't buid static libaraies when only DSO required"

This reverts commit f633c347574c0d814050b4bf2493e0cac6a5988c.

Merge branch 'PHP-7.4'

* PHP-7.4:
Fixed bug #78614 (Does not compile with DTRACE anymore)

Fixed bug #78614 (Does not compile with DTRACE anymore)

Merge branch 'PHP-7.4'

* PHP-7.4:
Don't buid static libaraies when only DSO required

Don't buid static libaraies when only DSO required

Port various autoconf bits to C99 compilers

C99 no longer has implicit function declarations and implicit ints.
Current GCC versions enable them as an extension, but this will
change

Port various autoconf bits to C99 compilers

C99 no longer has implicit function declarations and implicit ints.
Current GCC versions enable them as an extension, but this will
change in a future GCC version.

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Merge branch 'PHP-7.4'

* PHP-7.4:
Remove duplicate socklen_t check

Remove duplicate socklen_t check

- Use Autoconf's default AC_CHECK_TYPES

Closes GH-4418

Merge branch 'PHP-7.4'

* PHP-7.4:
Refactor undefining PACKAGE_* symbols

Refactor undefining PACKAGE_* symbols

Instead of patching configuration headers template generated by
the given tools - autoheader, this moves patching these symbols to
the configure

Refactor undefining PACKAGE_* symbols

Instead of patching configuration headers template generated by
the given tools - autoheader, this moves patching these symbols to
the configure step before creating and invoking the config.status
and before the configuration header file is generated from the
patched template.

Closes GH-4374

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Merge branch 'PHP-7.4'

* PHP-7.4:
Simplify PHP_CHECK_PDO_INCLUDES calls

Simplify PHP_CHECK_PDO_INCLUDES calls

Conditional checks were once used for backwards compatibility with
phpize from PHP versions that didn't have this macro call yet.

Closes GH

Simplify PHP_CHECK_PDO_INCLUDES calls

Conditional checks were once used for backwards compatibility with
phpize from PHP versions that didn't have this macro call yet.

Closes GH-4376

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Merge branch 'PHP-7.4'

* PHP-7.4:
Remove PHP_DEBUG_MACRO

Remove PHP_DEBUG_MACRO

The macro is no longer used. The warning at the end of the configure
script therefore is also no longer used.