meson: record which other options are a pre-requisite

Several meson options cannot be enabled, without first enabling another
option. This adds a small comment prior to an option to record its
mandatory dependencies.

Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>

meson_options.txt

@@ -4,6 +4,7 @@ option('packager_version', type: 'string', value: '', description: 'Extra packag
 option('system', type: 'boolean', value: false, description: 'Set install paths to system ones')
 option('runstatedir', type: 'string', value: '', description: 'State directory for temporary sockets, pid files, etc')
 option('initconfdir', type: 'string', value: '', description: 'directory for init script configuration files')
+# dep:tests
 option('expensive_tests', type: 'feature', value: 'auto', description: 'set the default for enabling expensive tests (long timeouts)')
 option('test_coverage', type: 'boolean', value: false, description: 'turn on code coverage instrumentation')
 option('git_werror', type: 'feature', value: 'auto', description: 'use -Werror if building from GIT')
@@ -17,6 +18,7 @@ option('tests', type: 'feature', value: 'auto', description: 'whether to build a
 option('apparmor', type: 'feature', value: 'auto', description: 'apparmor support')
 option('attr', type: 'feature', value: 'auto', description: 'attr support')
 option('audit', type: 'feature', value: 'auto', description: 'audit support')
+# dep:readline
 option('bash_completion', type: 'feature', value: 'auto', description: 'bash-completion support')
 option('bash_completion_dir', type: 'string', value: '', description: 'directory containing bash completion scripts')
 option('blkid', type: 'feature', value: 'auto', description: 'blkid support')
@@ -40,7 +42,9 @@ option('sanlock', type: 'feature', value: 'auto', description: 'sanlock support'
 option('sasl', type: 'feature', value: 'auto', description: 'sasl support')
 option('selinux', type: 'feature', value: 'auto', description: 'selinux support')
 option('selinux_mount', type: 'string', value: '', description: 'set SELinux mount point')
+# dep:pciaccess
 option('udev', type: 'feature', value: 'auto', description: 'udev support')
+# dep:driver_remote
 option('wireshark_dissector', type: 'feature', value: 'auto', description: 'wireshark support')
 option('wireshark_plugindir', type: 'string', value: '', description: 'wireshark plugins directory for use when installing wireshark plugin')
 option('yajl', type: 'feature', value: 'auto', description: 'yajl support')
@@ -48,17 +52,26 @@ option('yajl', type: 'feature', value: 'auto', description: 'yajl support')
 
 # build driver options
 option('driver_bhyve', type: 'feature', value: 'auto', description: 'bhyve driver')
+# dep:curl
 option('driver_esx', type: 'feature', value: 'auto', description: 'esx driver')
+# dep:openwsman
 option('driver_hyperv', type: 'feature', value: 'auto', description: 'Hyper-V driver')
+# dep:pciaccess dep:udev dep:driver_remote dep:driver_libvirtd
 option('driver_interface', type: 'feature', value: 'auto', description: 'host interface driver')
+# dep:driver_remote
 option('driver_libvirtd', type: 'feature', value: 'auto', description: 'libvirtd driver')
+# dep:driver_remote dep:driver_libvirtd
 option('driver_libxl', type: 'feature', value: 'auto', description: 'libxenlight driver')
+# dep:driver_remote dep:driver_libvirtd
 option('driver_lxc', type: 'feature', value: 'auto', description: 'Linux Container driver')
+# dep:curl dep:yajl dep:driver_remote dep:driver_libvirtd
 option('driver_ch', type: 'feature', value: 'auto', description: 'Cloud-Hypervisor driver')
 option('ch_user', type: 'string', value: '', description: 'username to run Cloud-Hypervisor system instance as')
 option('ch_group', type: 'string', value: '', description: 'groupname to run Cloud-Hypervisor system instance as')
+# dep:driver_remote dep:driver_libvirtd
 option('driver_network', type: 'feature', value: 'auto', description: 'virtual network driver')
 option('driver_openvz', type: 'feature', value: 'auto', description: 'OpenVZ driver')
+# dep:yajl dep:driver_remote dep:driver_libvirtd
 option('driver_qemu', type: 'feature', value: 'auto', description: 'QEMU/KVM driver')
 option('qemu_user', type: 'string', value: '', description: 'username to run QEMU system instance as')
 option('qemu_group', type: 'string', value: '', description: 'groupname to run QEMU system instance as')
@@ -74,7 +87,9 @@ option('driver_vmware', type: 'feature', value: 'auto', description: 'VMware dri
 option('driver_vz', type: 'feature', value: 'auto', description: 'Virtuozzo driver')
 
 option('secdriver_apparmor', type: 'feature', value: 'auto', description: 'use AppArmor security driver')
+# dep:secdriver_apparmor
 option('apparmor_profiles', type: 'feature', value: 'auto', description: 'install apparmor profiles')
+# dep:selinux
 option('secdriver_selinux', type: 'feature', value: 'auto', description: 'use SELinux security driver')
 
 
@@ -97,16 +112,21 @@ option('storage_zfs', type: 'feature', value: 'auto', description: 'ZFS backend
 option('chrdev_lock_files', type: 'string', value: '', description: 'location for UUCP style lock files for character devices (leave empty for default paths on some platforms)')
 option('dtrace', type: 'feature', value: 'auto', description: 'use dtrace for static probing')
 option('firewalld', type: 'feature', value: 'auto', description: 'firewalld support')
+# dep:firewalld
 option('firewalld_zone', type: 'feature', value: 'auto', description: 'whether to install firewalld libvirt zone')
 option('host_validate', type: 'feature', value: 'auto', description: 'build virt-host-validate')
 option('init_script', type: 'combo', choices: ['systemd', 'openrc', 'check', 'none'], value: 'check', description: 'Style of init script to install')
 option('loader_nvram', type: 'string', value: '', description: 'Pass list of pairs of <loader>:<nvram> paths. Both pairs and list items are separated by a colon.')
 option('login_shell', type: 'feature', value: 'auto', description: 'build virt-login-shell')
+# dep:yajl dep:driver_network dep:libvirtd
 option('nss', type: 'feature', value: 'auto', description: 'enable Name Service Switch plugin for resolving guest IP addresses')
+# dep:numactl
 option('numad', type: 'feature', value: 'auto', description: 'use numad to manage CPU placement dynamically')
 option('nbdkit', type: 'feature', value: 'auto', description: 'Build nbdkit storage backend')
+# dep:nbdkit
 option('nbdkit_config_default', type: 'feature', value: 'auto', description: 'Whether to use nbdkit storage backend for network disks by default (configurable)')
 option('pm_utils', type: 'feature', value: 'auto', description: 'use pm-utils for power management')
 option('sysctl_config', type: 'feature', value: 'auto', description: 'Whether to install sysctl configs')
+# dep:sysctl_config
 option('userfaultfd_sysctl', type: 'feature', value: 'auto', description: 'Whether to install sysctl config for enabling unprivileged userfaultfd')
 option('tls_priority', type: 'string', value: 'NORMAL', description: 'set the default TLS session priority string')