Fix Solaris 10 build: missing libproc.h (#15525)

The libproc.h header file was added on Solaris as of 11.4.

* Also add guard check to the entire function
* When libproc.h isn't

Fix Solaris 10 build: missing libproc.h (#15525)

The libproc.h header file was added on Solaris as of 11.4.

* Also add guard check to the entire function
* When libproc.h isn't available also sys/procfs.h is redundant
* Move the <sys/lwp.h> out of the guard
* Exclude more stuff from Solaris 10

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Autotools: Fix stack direction check (#15528)

On Solaris 10 and GCC 4.9 check failed with error in config.log:
error: missing binary operator before token "("

The __has_builtin

Autotools: Fix stack direction check (#15528)

On Solaris 10 and GCC 4.9 check failed with error in config.log:
error: missing binary operator before token "("

The __has_builtin must be checked in its own `#ifdef/defined` line
above the `#if __has_builtin(....` usage.

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Autotools: Remove too basic optimization flag cleanup

The optimization flags are removed in configure.ac when using the
'--enable-debug' configure option (which also adds the '-O0'). Whe

Autotools: Remove too basic optimization flag cleanup

The optimization flags are removed in configure.ac when using the
'--enable-debug' configure option (which also adds the '-O0'). When
using '--enable-debug-assertions' option, the optimization flags ideally
shouldn't be removed and this case never actually happen because the
CFLAGS at this point in ZEND_INIT contain all sorts of other flags also,
so it's redundant as it never gets executed.

Closes GH-15305

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Autotools: Sync CS in Zend.m4 (#15304)

- Autoconf sets the GCC variable to either "yes" if GNU C compatible
compiler is detected (like gcc or clang) or to an empty value
otherwis

Autotools: Sync CS in Zend.m4 (#15304)

- Autoconf sets the GCC variable to either "yes" if GNU C compatible
compiler is detected (like gcc or clang) or to an empty value
otherwise.
- AX_CHECK_COMPILE_FLAG arguments quoted and empty arguments trimmed

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Autotools: Remove DEBUG_CFLAGS (#15300)

DEBUG_CFLAGS is at this point redundant variable.

Autotools: Refactor thread safety checks (#15214)

- The ZTS is defined on only one place
- Added help text for ZTS preprocessor macro
- The 'enable_zts' variable replaced with PHP_TH

Autotools: Refactor thread safety checks (#15214)

- The ZTS is defined on only one place
- Added help text for ZTS preprocessor macro
- The 'enable_zts' variable replaced with PHP_THREAD_SAFETY in
configure.ac.
- Nits fixed.

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Autotools: Refactor debug checks (#15215)

- Added help text for ZEND_DEBUG preprocessor macro
- CS synced

Sync preprocessor macros help texts (#15218)

This partially syncs help texts a bit further for:
- ext/ffi
- ext/ldap
- ext/opcache
- ext/pcre
- ext/pdo_mysql
- ext/re

Sync preprocessor macros help texts (#15218)

This partially syncs help texts a bit further for:
- ext/ffi
- ext/ldap
- ext/opcache
- ext/pcre
- ext/pdo_mysql
- ext/readline
- ext/standard

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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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Autotools: Quote M4 arguments (#15045)

- AC_MSG_CHECKING
- AC_MSG_RESULT
- AC_MSG_WARN
- AC_MSG_ERROR
- AC_MSG_NOTICE

[skip ci] Trim trailing whitespace in *.m4

zend build making sigjmp_buf and api check as mandatory. (#14942)

* zend build making sigjmp_buf and api check as mandatory.

all unixes support it since long time, the few which don

zend build making sigjmp_buf and api check as mandatory. (#14942)

* zend build making sigjmp_buf and api check as mandatory.

all unixes support it since long time, the few which don't do not meet
the requirements to build php anyway (minix, dietlibc, ...).

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Autotools: Remove unused DEBUG_CFLAGS variable (#12659)

This removes the unused DEBUG_CFLAGS variable from configure.ac. It has
been once set in the build files similarly to Zend.m4 but

Autotools: Remove unused DEBUG_CFLAGS variable (#12659)

This removes the unused DEBUG_CFLAGS variable from configure.ac. It has
been once set in the build files similarly to Zend.m4 but was then
removed and simplified.

CS synced and DEBUG_CFLAGS checked and appended with AS_VAR_* macros.

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Update http links to https and sync www.php.net URLs (#14854)

Fix stack limit on ASAN/MSAN (#14771)

Increase the reserved stack size in ASAN builds, as instrumentation use more stack.
Increase the max allowed stack size in some tests, and enable th

Fix stack limit on ASAN/MSAN (#14771)

Increase the reserved stack size in ASAN builds, as instrumentation use more stack.
Increase the max allowed stack size in some tests, and enable these tests under ASAN.
Use __builtin_frame_address(0), instead of some stack variable, when we need a stack address, as ASAN may store local variables outside of the real stack.

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Autotools: Sync indentation style in build system files (#14725)

Wrap Zend max execution timers check in M4 macro (#14696)

- PHP_CHECK_FUNC -> AC_SEARCH_LIBS
- Redundant symbols HAVE_LIBRT and HAVE_TIMER_CREATE removed
- The rt library for some ol

Wrap Zend max execution timers check in M4 macro (#14696)

- PHP_CHECK_FUNC -> AC_SEARCH_LIBS
- Redundant symbols HAVE_LIBRT and HAVE_TIMER_CREATE removed
- The rt library for some older systems (Solaris <= 10, older Linux)
appended as needed
- This uses AC_ and AS_* macros and relies more on Autoconf shell
code handling
- Help texts updated and synced

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Refactor ZEND_MM alignment check (#14720)

- Check added into a separate M4 macro
- AC_CACHE_CHECK used for running the test program with cache variable
for optional edge-case overr

Refactor ZEND_MM alignment check (#14720)

- Check added into a separate M4 macro
- AC_CACHE_CHECK used for running the test program with cache variable
for optional edge-case overrides
- Help texts updated
- If check fails for some reason, the configure step emits error as
also done in the Zend C code
- Cross-compilation values updated with type casts as done in the
current conftest file output

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Use AC_CACHE_CHECK for float precision checks (#14663)

- AC_CACHE_CHECK simplifies message checkings and can speed up the
consequtive configure -C checks
- AC_DEFINE descriptions s

Use AC_CACHE_CHECK for float precision checks (#14663)

- AC_CACHE_CHECK simplifies message checkings and can speed up the
consequtive configure -C checks
- AC_DEFINE descriptions style synced
- Used php_cv_* cache variables style
- Reduced over-quoted arguments to AC_LANG_PROGRAM
- Sync macro help text

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Refactor Zend signal handling check (#14678)

This wraps the Zend signal handling check in its own M4 macro for
readability and uses AS_VAR_IF, AS_VAR_APPEND for CFLAGS variable,
upda

Refactor Zend signal handling check (#14678)

This wraps the Zend signal handling check in its own M4 macro for
readability and uses AS_VAR_IF, AS_VAR_APPEND for CFLAGS variable,
updates help texts and fixes CS.

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Wrap stack direction check in Zend M4 macro (#14694)

Wrap __cpuid_count check into ZEND_CHECK_CPUID_COUNT M4 macro (#14692)

Instead of checking this when including the Zend.m4 file in configure.ac
check is executed with the ZEND_INIT macro.

Wrap global register variables check in M4 macro (#14683)

This adds ZEND_CHECK_GLOBAL_REGISTER_VARIABLES M4 macro to properly
sort the --enable-gcc-global-regs in configure --help output

Wrap global register variables check in M4 macro (#14683)

This adds ZEND_CHECK_GLOBAL_REGISTER_VARIABLES M4 macro to properly
sort the --enable-gcc-global-regs in configure --help output, fixes
over-quoted arguments, syncs CS and updates help texts.

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Rename and refactor Zend.m4 macros (#14671)

- LIBZEND_* -> ZEND_*
- A single "public" initialization M4 macro ZEND_INIT that wraps Zend
engine related configure step checks and ini

Rename and refactor Zend.m4 macros (#14671)

- LIBZEND_* -> ZEND_*
- A single "public" initialization M4 macro ZEND_INIT that wraps Zend
engine related configure step checks and initialization.

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Check for library functions on one place in Zend.m4 (#14635)

The m4_normalize is for Autoconf < 2.70 (on 2.70 and later versions a
blank-or-newline separated items can be expanded withou

Check for library functions on one place in Zend.m4 (#14635)

The m4_normalize is for Autoconf < 2.70 (on 2.70 and later versions a
blank-or-newline separated items can be expanded without using
backslash-newline).

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