meson: Fix automagic build of msdk plugin

When building the msdk plugin even if libmfx is found, unless the
plugin is explicitly enabled we should not error out if msdk
dependencies are not found.

Also give an error message when we don't build the plugin on Windows
because we're not building with MSVC.

diff --git a/sys/msdk/meson.build b/sys/msdk/meson.build
index c94102d..e1ca582 100644 (file)
--- a/sys/msdk/meson.build
+++ b/sys/msdk/meson.build
@@ -70,14 +70,17 @@ if cxx.has_header('mfxvp9.h', args: '-I' + mfx_incdir)
 endif
 
 if host_machine.system() == 'windows'
-  legacy_stdio_dep = cc.find_library('legacy_stdio_definitions', required: true)
-  d3d11_dep = cc.find_library('d3d11', required: true)
+  if cc.get_id() != 'msvc' and msdk_option.enabled()
+    error('msdk plugin can only be built with MSVC')
+  endif
+  legacy_stdio_dep = cc.find_library('legacy_stdio_definitions', required: get_option('msdk'))
+  d3d11_dep = cc.find_library('d3d11', required: get_option('msdk'))
   msdk_deps = declare_dependency(dependencies: [d3d11_dep, legacy_stdio_dep])
   msdk_deps_found = d3d11_dep.found() and legacy_stdio_dep.found() and cc.get_id() == 'msvc'
 else
-  libva_dep = dependency('libva-drm', required: true)
-  libdl_dep = cc.find_library('dl', required: true)
-  libgudev_dep = dependency('gudev-1.0', required: true)
+  libva_dep = dependency('libva-drm', required: get_option('msdk'))
+  libdl_dep = cc.find_library('dl', required: get_option('msdk'))
+  libgudev_dep = dependency('gudev-1.0', required: get_option('msdk'))
   msdk_deps = declare_dependency(dependencies: [libva_dep, libdl_dep, libgudev_dep])
   msdk_deps_found = libva_dep.found() and libdl_dep.found() and libgudev_dep.found()
 endif