meson.build: Do not look for VNC-related libraries if have_system is not set

When running "./configure --static --disable-system" there is currently
a warning if the static version of libpng is missing:

 WARNING: Static library 'png16' not found for dependency 'libpng', may not
 be statically linked

Since it does not make sense to look for the VNC-related libraries at all
when we're building without system emulator binaries, let's add a check
for have_system here to silence this warning.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20210906153939.165567-1-thuth@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/meson.build b/meson.build
index 7e58e6279b637455a5917e00fc669ec7a91a2724..f07236d9474bc7366c0a49f59bc0c900e6b1acdc 100644 (file)
--- a/meson.build
+++ b/meson.build
@@ -931,7 +931,7 @@ vnc = not_found
 png = not_found
 jpeg = not_found
 sasl = not_found
-if not get_option('vnc').disabled()
+if have_system and not get_option('vnc').disabled()
   vnc = declare_dependency() # dummy dependency
   png = dependency('libpng', required: get_option('vnc_png'),
                    method: 'pkg-config', kwargs: static_kwargs)