accel/meson: Only build hw virtualization with system emulation

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20220207075426.81934-3-f4bug@amsat.org>

accel/meson.build

@@ -2,12 +2,14 @@ specific_ss.add(files('accel-common.c'))
 softmmu_ss.add(files('accel-softmmu.c'))
 user_ss.add(files('accel-user.c'))
 
-subdir('hvf')
-subdir('qtest')
-subdir('kvm')
 subdir('tcg')
-subdir('xen')
-subdir('stubs')
+if have_system
+  subdir('hvf')
+  subdir('qtest')
+  subdir('kvm')
+  subdir('xen')
+  subdir('stubs')
+endif
 
 dummy_ss = ss.source_set()
 dummy_ss.add(files(