libvduse: Add extra compiler warnings

In case libvhost-user is used externally, that projects compiler
warnings might be more strict. Enforce an extra set of compiler warnings
to catch issues early on.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <08daa1896ad8824e17d57d6a970bc0b4bee73ece.1671741278.git.marcel@holtmann.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

subprojects/libvduse/meson.build

 project('libvduse', 'c',
         license: 'GPL-2.0-or-later',
-        default_options: ['c_std=gnu99'])
+        default_options: ['warning_level=1', 'c_std=gnu99'])
+
+cc = meson.get_compiler('c')
+add_project_arguments(cc.get_supported_arguments('-Wsign-compare',
+                                                 '-Wdeclaration-after-statement',
+                                                 '-Wstrict-aliasing'),
+                      native: false, language: 'c')
 
 libvduse = static_library('vduse',
                           files('libvduse.c'),