meson: move libudev test

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

configure

@@ -908,7 +908,6 @@ Linux)
   linux_user="yes"
   kvm="yes"
   QEMU_INCLUDES="-isystem ${source_path}/linux-headers -Ilinux-headers $QEMU_INCLUDES"
-  libudev="yes"
 ;;
 esac
 
@@ -6287,15 +6286,6 @@ if test "$libnfs" != "no" ; then
 fi
 
 ##########################################
-# Do we have libudev
-if test "$libudev" != "no" ; then
-  if $pkg_config libudev && test "$static" != "yes"; then
-    libudev="yes"
-    libudev_libs=$($pkg_config --libs libudev)
-  else
-    libudev="no"
-  fi
-fi
 
 # Exclude --warn-common with TSan to suppress warnings from the TSan libraries.
 if test "$solaris" = "no" && test "$tsan" = "no"; then
@@ -7456,10 +7446,6 @@ if test "$gcov" = "yes" ; then
   echo "CONFIG_GCOV=y" >> $config_host_mak
 fi
 
-if test "$libudev" != "no"; then
-    echo "CONFIG_LIBUDEV=y" >> $config_host_mak
-    echo "LIBUDEV_LIBS=$libudev_libs" >> $config_host_mak
-fi
 if test "$fuzzing" != "no"; then
     echo "CONFIG_FUZZ=y" >> $config_host_mak
 fi

meson.build

@@ -257,8 +257,8 @@ if 'CONFIG_CURL' in config_host
                             link_args: config_host['CURL_LIBS'].split())
 endif
 libudev = not_found
-if 'CONFIG_LIBUDEV' in config_host
-  libudev = declare_dependency(link_args: config_host['LIBUDEV_LIBS'].split())
+if targetos == 'linux' and (have_system or have_tools)
+  libudev = dependency('libudev', static: enable_static)
 endif
 brlapi = not_found
 if 'CONFIG_BRLAPI' in config_host
@@ -440,6 +440,7 @@ has_gettid = cc.has_function('gettid')
 
 # Create config-host.h
 
+config_host_data.set('CONFIG_LIBUDEV', libudev.found())
 config_host_data.set('CONFIG_SDL', sdl.found())
 config_host_data.set('CONFIG_SDL_IMAGE', sdl_image.found())
 config_host_data.set('CONFIG_VNC', vnc.found())
@@ -1450,7 +1451,7 @@ summary_info += {'sheepdog support':  config_host.has_key('CONFIG_SHEEPDOG')}
 summary_info += {'capstone':          config_host.has_key('CONFIG_CAPSTONE')}
 summary_info += {'libpmem support':   config_host.has_key('CONFIG_LIBPMEM')}
 summary_info += {'libdaxctl support': config_host.has_key('CONFIG_LIBDAXCTL')}
-summary_info += {'libudev':           config_host.has_key('CONFIG_LIBUDEV')}
+summary_info += {'libudev':           libudev.found()}
 summary_info += {'default devices':   config_host['CONFIG_MINIKCONF_MODE'] == '--defconfig'}
 summary_info += {'plugin support':    config_host.has_key('CONFIG_PLUGIN')}
 summary_info += {'fuzzing support':   config_host.has_key('CONFIG_FUZZ')}