Bug #81007 [Opn->Csd]: JIT "not supported" on 32-bit x86 -- build problem?

Edit report at https://bugs.php.net/bug.php?id=81007&edit=1 ID: 81007 Updated by: nikic@php.net Reported by: php at redir dot desz dot cz Summary: JIT "not supported" on 32-bit x86 -- build problem? -Status: Open +Status: Closed Type: Bug Package: JIT Operating System: Linux PHP Version: 8.0.5 -Assigned To: +Assigned To: nikic Block user comment: N Private report: N New Comment: This should be fixed by https://github.com/php/php-src/commit/bf9dc534356ec3b372abe5f3030c3e362aa261ac, though I haven't tested it. Previous Comments: ------------------------------------------------------------------------ [2021-05-02 21:09:04] php at redir dot desz dot cz Description: ------------ It may be a documentation or build problem, not sure which exactly -- my limited testing suggests that build process mistakenly disables JIT. https://wiki.php.net/rfc/jit states "Currently we support x86 and x86_64 on POSIX platforms" -- I get "x86" here means 32-bit x86. I have a 32-bit system I've built PHP 8 on (8.0.3 and 8.0.5). JIT was "unavailable" in phpinfo(), and I've found "WARNING: JIT not supported by host architecture" in config.log. Checking "configure", I've found, that the test for said architecture is: case $host_cpu in x86*) ;; *) { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: JIT not supported by host architecture" >&5 $as_echo "$as_me: WARNING: JIT not supported by host architecture" >&2;} PHP_OPCACHE_JIT=no ;; esac BUT $host_cpu on my system is recognized as "i686", so the "x86*" condition never matches. Out of curiosity, I've modified the condition to match my CPU and rebuilt PHP; now phpinfo() reports JIT as "On", opcache_get_status() says it's "enabled" and "on", and so far I haven't encountered a single problem running various scripts (I haven't measured performance yet, though). So -- is there a mistake in docs, and for some reason JIT really should not be used on 32bit systems, or a mistake in configure script? ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=81007&edit=1