Allow switching back to Zend MM heap.

Remove __USE_GNU defines

This is an internal glibc macro, it should not be necessary to use
it if we already define _GNU_SOURCE (we do through
AC_USE_SYSTEM_EXTENSIONS). Needing to u

Remove __USE_GNU defines

This is an internal glibc macro, it should not be necessary to use
it if we already define _GNU_SOURCE (we do through
AC_USE_SYSTEM_EXTENSIONS). Needing to use __USE_GNU generally
indicates an inclusion order problem (libc header included before
config.h).

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Remove unused MREMAP_MAYMOVE compatibility define

Fix localized error messages and memory leaks

The FormatMessage API needs to LocalFree the delivered error messages.
In cases where messages are delivered in non ASCII compatible encodin

Fix localized error messages and memory leaks

The FormatMessage API needs to LocalFree the delivered error messages.
In cases where messages are delivered in non ASCII compatible encoding,
the messages might be unreadable. This aligns the error message encoding
with the encoding settings in PHP, the focus is UTF-8 as default.

Initialize error buffer

Avoid code duplication

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Merge branch 'PHP-7.3'

Support fixed address mmap without replacement

Reapply changes for Zend fixed mapping but only for FreeBSD.
Other BSD might expose some day a similar flag (private
for OpenBSD for th

Support fixed address mmap without replacement

Reapply changes for Zend fixed mapping but only for FreeBSD.
Other BSD might expose some day a similar flag (private
for OpenBSD for the moment for example).
The Linux's part could be brought back but not before 7.4,
at this time, distributions with kernel > 4.17 will be
more widely available.

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Merge branch 'PHP-7.3'

* PHP-7.3:
Revert "Support fixed address mmap without replacement"
Revert "Don't report mmap failure if it is expected"

Revert "Support fixed address mmap without replacement"

This reverts commit 0f68ff5c92924deb9401ce66458e67f250ccde74.

Revert "Don't report mmap failure if it is expected"

This reverts commit 446b5b15d324dacd30f58313563a9d625fb54ac8.

Merge branch 'PHP-7.3'

Don't report mmap failure if it is expected

When using mmap with MAP_FIXED_NOREPLACE or MAP_FIXED|MAP_EXCL
an mmap failure is not an error condition, so do not print an
error message

Don't report mmap failure if it is expected

When using mmap with MAP_FIXED_NOREPLACE or MAP_FIXED|MAP_EXCL
an mmap failure is not an error condition, so do not print an
error message in this case.

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Merge branch 'PHP-7.3'

Support fixed address mmap without replacement

We did not use MAP_FIXED here, because it may replace an existing
mapping. This commit adds support for MAP_FIXED_NOREPLACE (available

Support fixed address mmap without replacement

We did not use MAP_FIXED here, because it may replace an existing
mapping. This commit adds support for MAP_FIXED_NOREPLACE (available
on newer Linux kernels) and MAP_FIXED|MAP_EXCL (available on FreeBSD),
which avoid this issue.

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Fix some misspellings

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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Micro-optimizations

Bit test optimization

micro optimisation

Added missing #if to allow compilation withput ZEND_MM_CUSTOM

year++

year++

Fixed inaccurate condition

Unused var

erealloc() optimization

Merge branch 'PHP-7.1' into PHP-7.2

* PHP-7.1:
Fixed bug #75368 (mmap/munmap trashing on unlucky allocations)