meson.build: convert --with-default-devices to meson

Pass the boolean option directly instead of writing
CONFIG_MINIKCONF_MODE to config-host.mak.

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

configure

@@ -446,7 +446,7 @@ sheepdog="no"
 libxml2="$default_feature"
 debug_mutex="no"
 libpmem="$default_feature"
-default_devices="yes"
+default_devices="true"
 plugins="no"
 fuzzing="no"
 rng_none="no"
@@ -943,9 +943,9 @@ for opt do
   ;;
   --with-trace-file=*) trace_file="$optarg"
   ;;
-  --with-default-devices) default_devices="yes"
+  --with-default-devices) default_devices="true"
   ;;
-  --without-default-devices) default_devices="no"
+  --without-default-devices) default_devices="false"
   ;;
   --without-default-features) # processed above
   ;;
@@ -5572,11 +5572,6 @@ echo "GIT_UPDATE=$git_update" >> $config_host_mak
 
 echo "ARCH=$ARCH" >> $config_host_mak
 
-if test "$default_devices" = "yes" ; then
-  echo "CONFIG_MINIKCONF_MODE=--defconfig" >> $config_host_mak
-else
-  echo "CONFIG_MINIKCONF_MODE=--allnoconfig" >> $config_host_mak
-fi
 if test "$debug_tcg" = "yes" ; then
   echo "CONFIG_DEBUG_TCG=y" >> $config_host_mak
 fi
@@ -6540,7 +6535,7 @@ NINJA=$ninja $meson setup \
         -Dlibnfs=$libnfs -Diconv=$iconv -Dcurses=$curses -Dlibudev=$libudev\
         -Drbd=$rbd -Dlzo=$lzo -Dsnappy=$snappy -Dlzfse=$lzfse \
         -Dzstd=$zstd -Dseccomp=$seccomp -Dvirtfs=$virtfs -Dcap_ng=$cap_ng \
-        -Dattr=$attr \
+        -Dattr=$attr -Ddefault_devices=$default_devices \
         -Ddocs=$docs -Dsphinx_build=$sphinx_build -Dinstall_blobs=$blobs \
         -Dvhost_user_blk_server=$vhost_user_blk_server \
         -Dfuse=$fuse -Dfuse_lseek=$fuse_lseek \

meson.build

@@ -1284,7 +1284,8 @@ foreach target : target_dirs
       output: config_devices_mak,
       depfile: config_devices_mak + '.d',
       capture: true,
-      command: [minikconf, config_host['CONFIG_MINIKCONF_MODE'],
+      command: [minikconf,
+                get_option('default_devices') ? '--defconfig' : '--allnoconfig',
                 config_devices_mak, '@DEPFILE@', '@INPUT@',
                 host_kconfig, accel_kconfig])
 
@@ -2478,7 +2479,7 @@ summary_info += {'capstone':          capstone_opt == 'disabled' ? false : capst
 summary_info += {'libpmem support':   config_host.has_key('CONFIG_LIBPMEM')}
 summary_info += {'libdaxctl support': config_host.has_key('CONFIG_LIBDAXCTL')}
 summary_info += {'libudev':           libudev.found()}
-summary_info += {'default devices':   config_host['CONFIG_MINIKCONF_MODE'] == '--defconfig'}
+summary_info += {'default devices':   get_option('default_devices')}
 summary_info += {'plugin support':    config_host.has_key('CONFIG_PLUGIN')}
 summary_info += {'fuzzing support':   config_host.has_key('CONFIG_FUZZ')}
 if config_host.has_key('HAVE_GDB_BIN')

meson_options.txt

@@ -7,6 +7,8 @@ option('qemu_firmwarepath', type : 'string', value : '',
 option('sphinx_build', type : 'string', value : '',
        description: 'Use specified sphinx-build [$sphinx_build] for building document (default to be empty)')
 
+option('default_devices', type : 'boolean', value : true,
+       description: 'Include a default selection of devices in emulators')
 option('docs', type : 'feature', value : 'auto',
        description: 'Documentations build support')
 option('gettext', type : 'feature', value : 'auto',