Disable options unsupported on Emscripten

Daemonizing and run-with aren't supported on Emscripten so disable these
flags.

Signed-off-by: Kohei Tokunaga <ktokunaga.mail@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Link: https://lore.kernel.org/r/79c5e591b634762703f3eef6427a192d145799e4.1745820062.git.ktokunaga.mail@gmail.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

qemu-options.hx

@@ -4862,7 +4862,7 @@ SRST
     Start right away with a saved state (``loadvm`` in monitor)
 ERST
 
-#ifndef _WIN32
+#if !defined(_WIN32) && !defined(EMSCRIPTEN)
 DEF("daemonize", 0, QEMU_OPTION_daemonize, \
     "-daemonize      daemonize QEMU after initializing\n", QEMU_ARCH_ALL)
 #endif
@@ -5249,7 +5249,7 @@ HXCOMM Internal use
 DEF("qtest", HAS_ARG, QEMU_OPTION_qtest, "", QEMU_ARCH_ALL)
 DEF("qtest-log", HAS_ARG, QEMU_OPTION_qtest_log, "", QEMU_ARCH_ALL)
 
-#ifdef CONFIG_POSIX
+#if defined(CONFIG_POSIX) && !defined(EMSCRIPTEN)
 DEF("run-with", HAS_ARG, QEMU_OPTION_run_with,
     "-run-with [async-teardown=on|off][,chroot=dir][user=username|uid:gid]\n"
     "                Set miscellaneous QEMU process lifecycle options:\n"

system/vl.c

@@ -767,7 +767,7 @@ static QemuOptsList qemu_smp_opts = {
     },
 };
 
-#if defined(CONFIG_POSIX)
+#if defined(CONFIG_POSIX) && !defined(EMSCRIPTEN)
 static QemuOptsList qemu_run_with_opts = {
     .name = "run-with",
     .head = QTAILQ_HEAD_INITIALIZER(qemu_run_with_opts.head),
@@ -3678,7 +3678,7 @@ void qemu_init(int argc, char **argv)
             case QEMU_OPTION_nouserconfig:
                 /* Nothing to be parsed here. Especially, do not error out below. */
                 break;
-#if defined(CONFIG_POSIX)
+#if defined(CONFIG_POSIX) && !defined(EMSCRIPTEN)
             case QEMU_OPTION_daemonize:
                 os_set_daemonize(true);
                 break;