When the PHP source code was versioned in Subversion, there was
possible to substitute certain keywords such as $Id$ with revision
number, last change time and author name. Such approach is not used
in Git so this patch removes these outdated artifacts from source
code files.
Commit 0782a7fc63 ("Fixed bug #74866
extension_dir = "./ext" now use current directory for base") modified
the php_load_zend_extension_cb() function to use php_load_shlib(), and
pass a handle to the newly introduced zend_load_extension_handle()
function instead of passing the extension path to
zend_load_extension().
While doing so, it introduced a call to php_load_shlib() from code
that is built even when HAVE_LIBDL is not defined. However,
php_load_shlib() is not implemented when HAVE_LIBDL is not defined,
for obvious reasons.
It turns out that zend_load_extension_handle() anyway doesn't do
anything when ZEND_EXTENSIONS_SUPPORT is defined to 0, and
ZEND_EXTENSIONS_SUPPORT is not defined when HAVE_LIBDL is not defined
(Zend/zend_portability.h).
Fixes the following build failure when building on a system that
doesn't have libdl:
main/php_ini.o: In function `php_load_zend_extension_cb':
php_ini.c:(.text+0x478): undefined reference to `php_load_shlib'
php_ini.c:(.text+0x4b0): undefined reference to `php_load_shlib'
collect2: error: ld returned 1 exit status
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
It is unused and does not work in any meaningful way:
Warnings are suppressed, but everything else (both notices and
fatals) are not. It would make some sense if it suppressed
warnings and lower, but right now this is a pointless mode.
Using the weak symbol explicit_bzero_hook does not work if LTO is
enabled. Instead avoid memset optimizations using an asm memory
barrier.
Use a fallback implementation where the memory is zeroed through
volatile.