PHP_ADD_EXTENSION_DEP doesn't fail when expected (build system)

Description

I have the following m4 code: https://github.com/pmmp/ext-pmmpthread/blob/6a516e5b58d326e2dcc23bb75fba6e210d5b313f/config.m4#L33-L44

        CLASSES_SRC="classes/pool.c classes/thread.c classes/thread_safe_array.c classes/thread_safe.c classes/runnable.c classes/worker.c"
        PHP_NEW_EXTENSION(pmmpthread, php_pmmpthread.c $CLASSES_SRC src/copy.c src/monitor.c src/worker.c src/globals.c src/prepare.c src/store.c src/handlers.c src/object.c src/routine.c src/queue.c src/ext_sockets_hacks.c, $ext_shared,, -DZEND_ENABLE_STATIC_TSRMLS_CACHE=1 -Werror=implicit-function-declaration)
        PHP_ADD_BUILD_DIR($ext_builddir/src, 1)
        PHP_ADD_INCLUDE($ext_builddir)

        if test "$PHP_PMMPTHREAD_SOCKETS" != "no"; then
                AC_MSG_NOTICE([Support for passing Socket objects between threads enabled. The sockets extension must be loaded at runtime. You can disable support using --without-pmmpthread-sockets.])
                AC_DEFINE(HAVE_PMMPTHREAD_EXT_SOCKETS_SUPPORT, 1, [Whether pmmpthread supports passing Socket objects between threads])
                PHP_ADD_EXTENSION_DEP(pmmpthread, sockets)
        else
                AC_MSG_NOTICE([Support for passing Socket objects between threads disabled. You can enable support using --with-pmmpthread-sockets.])
        fi
fi

When using --disable-all or --disable-sockets in conjunction with --with-pmmpthread-sockets, I expect the configure command to fail (because of the PHP_ADD_EXTENSION_DEP(pmmpthread, sockets)), but it doesn't.
The build proceeds and results in a compile error due to sockets being disabled.

Similar code for Windows works correctly.

PHP Version

PHP 8.2 git 6a914cb7a50fafbda38a4d8acce3a06b97dbd994

Operating System

WSL2 Ubuntu 20.04

Beginne mit dem verlinkten config.m4-Beispiel und verfolge PHP_ADD_EXTENSION_DEP(pmmpthread, sockets) durch die Makros zur configure-Generierung. Reproduziere dies mit --disable-all oder --disable-sockets zusammen mit --with-pmmpthread-sockets und vergleiche anschließend den Unix-Pfad mit dem Verhalten unter Windows; abgeschlossen ist die Untersuchung, wenn configure die fehlende Abhängigkeit vor der Kompilierung ablehnt.