xref: /openbmc/qemu/meson.build (revision a9c9727c)

project('qemu', ['c'], meson_version: '>=0.55.0',
        default_options: ['warning_level=1', 'c_std=gnu99', 'cpp_std=gnu++11', 'b_lundef=false'],
        version: run_command('head', meson.source_root() / 'VERSION').stdout().strip())

not_found = dependency('', required: false)
keyval = import('unstable-keyval')
ss = import('sourceset')

cc = meson.get_compiler('c')
config_host = keyval.load(meson.current_build_dir() / 'config-host.mak')

add_project_arguments(config_host['QEMU_CFLAGS'].split(),
                      native: false, language: ['c', 'objc'])
add_project_arguments(config_host['QEMU_CXXFLAGS'].split(),
                      native: false, language: 'cpp')
add_project_link_arguments(config_host['QEMU_LDFLAGS'].split(),
                           native: false, language: ['c', 'cpp', 'objc'])
add_project_arguments(config_host['QEMU_INCLUDES'].split(),
                      language: ['c', 'cpp', 'objc'])

python = import('python').find_installation()

link_language = meson.get_external_property('link_language', 'cpp')
if link_language == 'cpp'
  add_languages('cpp', required: true, native: false)
endif
if host_machine.system() == 'darwin'
  add_languages('objc', required: false, native: false)
endif

if 'SPARSE_CFLAGS' in config_host
  run_target('sparse',
             command: [find_program('scripts/check_sparse.py'),
                       config_host['SPARSE_CFLAGS'].split(),
                       'compile_commands.json'])
endif

configure_file(input: files('scripts/ninjatool.py'),
               output: 'ninjatool',
               configuration: config_host)

supported_oses = ['windows', 'freebsd', 'netbsd', 'openbsd', 'darwin', 'sunos', 'linux']
supported_cpus = ['ppc', 'ppc64', 's390x', 'sparc64', 'riscv32', 'riscv64', 'x86', 'x86_64',
  'arm', 'aarch64', 'mips', 'mips64', 'sparc', 'sparc64']

cpu = host_machine.cpu_family()
targetos = host_machine.system()

m = cc.find_library('m', required: false)
util = cc.find_library('util', required: false)
socket = []
version_res = []
if targetos == 'windows'
  socket = cc.find_library('ws2_32')

  win = import('windows')
  version_res = win.compile_resources('version.rc',
                                      depend_files: files('pc-bios/qemu-nsis.ico'),
                                      include_directories: include_directories('.'))
endif
glib = declare_dependency(compile_args: config_host['GLIB_CFLAGS'].split(),
                          link_args: config_host['GLIB_LIBS'].split())
gio = not_found
if 'CONFIG_GIO' in config_host
  gio = declare_dependency(compile_args: config_host['GIO_CFLAGS'].split(),
                           link_args: config_host['GIO_LIBS'].split())
endif
lttng = not_found
if 'CONFIG_TRACE_UST' in config_host
  lttng = declare_dependency(link_args: config_host['LTTNG_UST_LIBS'].split())
endif
urcubp = not_found
if 'CONFIG_TRACE_UST' in config_host
  urcubp = declare_dependency(link_args: config_host['URCU_BP_LIBS'].split())
endif
nettle = not_found
if 'CONFIG_NETTLE' in config_host
  nettle = declare_dependency(compile_args: config_host['NETTLE_CFLAGS'].split(),
                              link_args: config_host['NETTLE_LIBS'].split())
endif
gnutls = not_found
if 'CONFIG_GNUTLS' in config_host
  gnutls = declare_dependency(compile_args: config_host['GNUTLS_CFLAGS'].split(),
                              link_args: config_host['GNUTLS_LIBS'].split())
endif
seccomp = not_found
if 'CONFIG_SECCOMP' in config_host
  seccomp = declare_dependency(compile_args: config_host['SECCOMP_CFLAGS'].split(),
                               link_args: config_host['SECCOMP_LIBS'].split())
endif
libcap_ng = not_found
if 'CONFIG_LIBCAP_NG' in config_host
  libcap_ng = declare_dependency(link_args: config_host['LIBCAP_NG_LIBS'].split())
endif
libiscsi = not_found
if 'CONFIG_LIBISCSI' in config_host
  libiscsi = declare_dependency(compile_args: config_host['LIBISCSI_CFLAGS'].split(),
                                link_args: config_host['LIBISCSI_LIBS'].split())
endif

target_dirs = config_host['TARGET_DIRS'].split()
have_user = false
have_system = false
foreach target : target_dirs
  have_user = have_user or target.endswith('-user')
  have_system = have_system or target.endswith('-softmmu')
endforeach
have_tools = 'CONFIG_TOOLS' in config_host
have_block = have_system or have_tools

# Generators

qapi_gen = find_program('scripts/qapi-gen.py')
qapi_gen_depends = [ meson.source_root() / 'scripts/qapi/__init__.py',
                     meson.source_root() / 'scripts/qapi/commands.py',
                     meson.source_root() / 'scripts/qapi/common.py',
                     meson.source_root() / 'scripts/qapi/doc.py',
                     meson.source_root() / 'scripts/qapi/error.py',
                     meson.source_root() / 'scripts/qapi/events.py',
                     meson.source_root() / 'scripts/qapi/expr.py',
                     meson.source_root() / 'scripts/qapi/gen.py',
                     meson.source_root() / 'scripts/qapi/introspect.py',
                     meson.source_root() / 'scripts/qapi/parser.py',
                     meson.source_root() / 'scripts/qapi/schema.py',
                     meson.source_root() / 'scripts/qapi/source.py',
                     meson.source_root() / 'scripts/qapi/types.py',
                     meson.source_root() / 'scripts/qapi/visit.py',
                     meson.source_root() / 'scripts/qapi/common.py',
                     meson.source_root() / 'scripts/qapi/doc.py',
                     meson.source_root() / 'scripts/qapi-gen.py'
]

tracetool = [
  python, files('scripts/tracetool.py'),
   '--backend=' + config_host['TRACE_BACKENDS']
]

# Collect sourcesets.

util_ss = ss.source_set()
stub_ss = ss.source_set()
trace_ss = ss.source_set()

###############
# Trace files #
###############

trace_events_subdirs = [
  'accel/kvm',
  'accel/tcg',
  'crypto',
  'monitor',
]
if have_user
  trace_events_subdirs += [ 'linux-user' ]
endif
if have_block
  trace_events_subdirs += [
    'authz',
    'block',
    'io',
    'nbd',
    'scsi',
  ]
endif
if have_system
  trace_events_subdirs += [
    'audio',
    'backends',
    'backends/tpm',
    'chardev',
    'hw/9pfs',
    'hw/acpi',
    'hw/alpha',
    'hw/arm',
    'hw/audio',
    'hw/block',
    'hw/block/dataplane',
    'hw/char',
    'hw/display',
    'hw/dma',
    'hw/hppa',
    'hw/hyperv',
    'hw/i2c',
    'hw/i386',
    'hw/i386/xen',
    'hw/ide',
    'hw/input',
    'hw/intc',
    'hw/isa',
    'hw/mem',
    'hw/mips',
    'hw/misc',
    'hw/misc/macio',
    'hw/net',
    'hw/nvram',
    'hw/pci',
    'hw/pci-host',
    'hw/ppc',
    'hw/rdma',
    'hw/rdma/vmw',
    'hw/rtc',
    'hw/s390x',
    'hw/scsi',
    'hw/sd',
    'hw/sparc',
    'hw/sparc64',
    'hw/ssi',
    'hw/timer',
    'hw/tpm',
    'hw/usb',
    'hw/vfio',
    'hw/virtio',
    'hw/watchdog',
    'hw/xen',
    'hw/gpio',
    'hw/riscv',
    'migration',
    'net',
    'ui',
  ]
endif
trace_events_subdirs += [
  'hw/core',
  'qapi',
  'qom',
  'target/arm',
  'target/hppa',
  'target/i386',
  'target/mips',
  'target/ppc',
  'target/riscv',
  'target/s390x',
  'target/sparc',
  'util',
]

genh = []

subdir('qapi')
subdir('qobject')
subdir('stubs')
subdir('trace')
subdir('util')
subdir('crypto')
subdir('storage-daemon')

# Build targets from sourcesets

stub_ss = stub_ss.apply(config_host, strict: false)

util_ss.add_all(trace_ss)
util_ss = util_ss.apply(config_host, strict: false)
libqemuutil = static_library('qemuutil',
                             sources: util_ss.sources() + stub_ss.sources() + genh,
                             dependencies: [util_ss.dependencies(), m, glib, socket])
qemuutil = declare_dependency(link_with: libqemuutil,
                              sources: genh + version_res)

# Other build targets

if have_tools
  subdir('contrib/rdmacm-mux')

  if 'CONFIG_VHOST_USER' in config_host
    subdir('contrib/libvhost-user')
    subdir('contrib/vhost-user-blk')
    subdir('contrib/vhost-user-scsi')
  endif
endif

subdir('tools')

summary_info = {}
summary_info += {'Install prefix':    config_host['prefix']}
summary_info += {'BIOS directory':    config_host['qemu_datadir']}
summary_info += {'firmware path':     config_host['qemu_firmwarepath']}
summary_info += {'binary directory':  config_host['bindir']}
summary_info += {'library directory': config_host['libdir']}
summary_info += {'module directory':  config_host['qemu_moddir']}
summary_info += {'libexec directory': config_host['libexecdir']}
summary_info += {'include directory': config_host['includedir']}
summary_info += {'config directory':  config_host['sysconfdir']}
if targetos != 'windows'
  summary_info += {'local state directory': config_host['qemu_localstatedir']}
  summary_info += {'Manual directory':      config_host['mandir']}
else
  summary_info += {'local state directory': 'queried at runtime'}
endif
summary_info += {'Build directory':   meson.current_build_dir()}
summary_info += {'Source path':       meson.current_source_dir()}
summary_info += {'GIT binary':        config_host['GIT']}
summary_info += {'GIT submodules':    config_host['GIT_SUBMODULES']}
summary_info += {'C compiler':        meson.get_compiler('c').cmd_array()[0]}
summary_info += {'Host C compiler':   meson.get_compiler('c', native: true).cmd_array()[0]}
if link_language == 'cpp'
  summary_info += {'C++ compiler':      meson.get_compiler('cpp').cmd_array()[0]}
else
  summary_info += {'C++ compiler':      false}
endif
if targetos == 'darwin'
  summary_info += {'Objective-C compiler': meson.get_compiler('objc').cmd_array()[0]}
endif
summary_info += {'ARFLAGS':           config_host['ARFLAGS']}
summary_info += {'CFLAGS':            config_host['CFLAGS']}
summary_info += {'QEMU_CFLAGS':       config_host['QEMU_CFLAGS']}
summary_info += {'QEMU_LDFLAGS':      config_host['QEMU_LDFLAGS']}
summary_info += {'make':              config_host['MAKE']}
summary_info += {'install':           config_host['INSTALL']}
summary_info += {'python':            '@0@ (version: @1@)'.format(python.full_path(), python.language_version())}
summary_info += {'sphinx-build':      config_host['SPHINX_BUILD']}
summary_info += {'genisoimage':       config_host['GENISOIMAGE']}
# TODO: add back version
summary_info += {'slirp support':     config_host.has_key('CONFIG_SLIRP')}
if config_host.has_key('CONFIG_SLIRP')
  summary_info += {'smbd':            config_host['CONFIG_SMBD_COMMAND']}
endif
summary_info += {'module support':    config_host.has_key('CONFIG_MODULES')}
if config_host.has_key('CONFIG_MODULES')
  summary_info += {'alternative module path': config_host.has_key('CONFIG_MODULE_UPGRADES')}
endif
summary_info += {'host CPU':          cpu}
summary_info += {'host endianness':   build_machine.endian()}
summary_info += {'target list':       config_host['TARGET_DIRS']}
summary_info += {'gprof enabled':     config_host.has_key('CONFIG_GPROF')}
summary_info += {'sparse enabled':    meson.get_compiler('c').cmd_array().contains('cgcc')}
summary_info += {'strip binaries':    get_option('strip')}
summary_info += {'profiler':          config_host.has_key('CONFIG_PROFILER')}
summary_info += {'static build':      config_host.has_key('CONFIG_TOOLS')}
if targetos == 'darwin'
  summary_info += {'Cocoa support': config_host.has_key('CONFIG_COCOA')}
endif
# TODO: add back version
summary_info += {'SDL support':       config_host.has_key('CONFIG_SDL')}
summary_info += {'SDL image support': config_host.has_key('CONFIG_SDL_IMAGE')}
# TODO: add back version
summary_info += {'GTK support':       config_host.has_key('CONFIG_GTK')}
summary_info += {'GTK GL support':    config_host.has_key('CONFIG_GTK_GL')}
# TODO: add back version
summary_info += {'VTE support':       config_host.has_key('CONFIG_VTE')}
summary_info += {'TLS priority':      config_host['CONFIG_TLS_PRIORITY']}
summary_info += {'GNUTLS support':    config_host.has_key('CONFIG_GNUTLS')}
# TODO: add back version
summary_info += {'libgcrypt':         config_host.has_key('CONFIG_GCRYPT')}
if config_host.has_key('CONFIG_GCRYPT')
   summary_info += {'  hmac':            config_host.has_key('CONFIG_GCRYPT_HMAC')}
   summary_info += {'  XTS':             not config_host.has_key('CONFIG_QEMU_PRIVATE_XTS')}
endif
# TODO: add back version
summary_info += {'nettle':            config_host.has_key('CONFIG_NETTLE')}
if config_host.has_key('CONFIG_NETTLE')
   summary_info += {'  XTS':             not config_host.has_key('CONFIG_QEMU_PRIVATE_XTS')}
endif
summary_info += {'libtasn1':          config_host.has_key('CONFIG_TASN1')}
summary_info += {'PAM':               config_host.has_key('CONFIG_AUTH_PAM')}
summary_info += {'iconv support':     config_host.has_key('CONFIG_ICONV')}
summary_info += {'curses support':    config_host.has_key('CONFIG_CURSES')}
# TODO: add back version
summary_info += {'virgl support':     config_host.has_key('CONFIG_VIRGL')}
summary_info += {'curl support':      config_host.has_key('CONFIG_CURL')}
summary_info += {'mingw32 support':   targetos == 'windows'}
summary_info += {'Audio drivers':     config_host['CONFIG_AUDIO_DRIVERS']}
summary_info += {'Block whitelist (rw)': config_host['CONFIG_BDRV_RW_WHITELIST']}
summary_info += {'Block whitelist (ro)': config_host['CONFIG_BDRV_RO_WHITELIST']}
summary_info += {'VirtFS support':    config_host.has_key('CONFIG_VIRTFS')}
summary_info += {'Multipath support': config_host.has_key('CONFIG_MPATH')}
summary_info += {'VNC support':       config_host.has_key('CONFIG_VNC')}
if config_host.has_key('CONFIG_VNC')
  summary_info += {'VNC SASL support':  config_host.has_key('CONFIG_VNC_SASL')}
  summary_info += {'VNC JPEG support':  config_host.has_key('CONFIG_VNC_JPEG')}
  summary_info += {'VNC PNG support':   config_host.has_key('CONFIG_VNC_PNG')}
endif
summary_info += {'xen support':       config_host.has_key('CONFIG_XEN_BACKEND')}
if config_host.has_key('CONFIG_XEN_BACKEND')
  summary_info += {'xen ctrl version':  config_host['CONFIG_XEN_CTRL_INTERFACE_VERSION']}
endif
summary_info += {'brlapi support':    config_host.has_key('CONFIG_BRLAPI')}
summary_info += {'Documentation':     config_host.has_key('BUILD_DOCS')}
summary_info += {'PIE':               get_option('b_pie')}
summary_info += {'vde support':       config_host.has_key('CONFIG_VDE')}
summary_info += {'netmap support':    config_host.has_key('CONFIG_NETMAP')}
summary_info += {'Linux AIO support': config_host.has_key('CONFIG_LINUX_AIO')}
summary_info += {'Linux io_uring support': config_host.has_key('CONFIG_LINUX_IO_URING')}
summary_info += {'ATTR/XATTR support': config_host.has_key('CONFIG_ATTR')}
summary_info += {'Install blobs':     config_host.has_key('INSTALL_BLOBS')}
# TODO: add back KVM/HAX/HVF/WHPX/TCG
#summary_info += {'KVM support':       have_kvm'}
#summary_info += {'HAX support':       have_hax'}
#summary_info += {'HVF support':       have_hvf'}
#summary_info += {'WHPX support':      have_whpx'}
#summary_info += {'TCG support':       have_tcg'}
#if get_option('tcg')
#  summary_info += {'TCG debug enabled': config_host.has_key('CONFIG_DEBUG_TCG')}
#  summary_info += {'TCG interpreter':   config_host.has_key('CONFIG_TCG_INTERPRETER')}
#endif
summary_info += {'malloc trim support': config_host.has_key('CONFIG_MALLOC_TRIM')}
summary_info += {'RDMA support':      config_host.has_key('CONFIG_RDMA')}
summary_info += {'PVRDMA support':    config_host.has_key('CONFIG_PVRDMA')}
summary_info += {'fdt support':       config_host.has_key('CONFIG_FDT')}
summary_info += {'membarrier':        config_host.has_key('CONFIG_MEMBARRIER')}
summary_info += {'preadv support':    config_host.has_key('CONFIG_PREADV')}
summary_info += {'fdatasync':         config_host.has_key('CONFIG_FDATASYNC')}
summary_info += {'madvise':           config_host.has_key('CONFIG_MADVISE')}
summary_info += {'posix_madvise':     config_host.has_key('CONFIG_POSIX_MADVISE')}
summary_info += {'posix_memalign':    config_host.has_key('CONFIG_POSIX_MEMALIGN')}
summary_info += {'libcap-ng support': config_host.has_key('CONFIG_LIBCAP_NG')}
summary_info += {'vhost-net support': config_host.has_key('CONFIG_VHOST_NET')}
summary_info += {'vhost-crypto support': config_host.has_key('CONFIG_VHOST_CRYPTO')}
summary_info += {'vhost-scsi support': config_host.has_key('CONFIG_VHOST_SCSI')}
summary_info += {'vhost-vsock support': config_host.has_key('CONFIG_VHOST_VSOCK')}
summary_info += {'vhost-user support': config_host.has_key('CONFIG_VHOST_KERNEL')}
summary_info += {'vhost-user-fs support': config_host.has_key('CONFIG_VHOST_USER_FS')}
summary_info += {'vhost-vdpa support': config_host.has_key('CONFIG_VHOST_VDPA')}
summary_info += {'Trace backends':    config_host['TRACE_BACKENDS']}
if config_host['TRACE_BACKENDS'].split().contains('simple')
  summary_info += {'Trace output file': config_host['CONFIG_TRACE_FILE'] + '-<pid>'}
endif
# TODO: add back protocol and server version
summary_info += {'spice support':     config_host.has_key('CONFIG_SPICE')}
summary_info += {'rbd support':       config_host.has_key('CONFIG_RBD')}
summary_info += {'xfsctl support':    config_host.has_key('CONFIG_XFS')}
summary_info += {'smartcard support': config_host.has_key('CONFIG_SMARTCARD')}
summary_info += {'libusb':            config_host.has_key('CONFIG_USB_LIBUSB')}
summary_info += {'usb net redir':     config_host.has_key('CONFIG_USB_REDIR')}
summary_info += {'OpenGL support':    config_host.has_key('CONFIG_OPENGL')}
summary_info += {'OpenGL dmabufs':    config_host.has_key('CONFIG_OPENGL_DMABUF')}
summary_info += {'libiscsi support':  config_host.has_key('CONFIG_LIBISCSI')}
summary_info += {'libnfs support':    config_host.has_key('CONFIG_LIBNFS')}
summary_info += {'build guest agent': config_host.has_key('CONFIG_GUEST_AGENT')}
if targetos == 'windows'
  if 'WIN_SDK' in config_host
    summary_info += {'Windows SDK':       config_host['WIN_SDK']}
  endif
  summary_info += {'QGA VSS support':   config_host.has_key('CONFIG_QGA_VSS')}
  summary_info += {'QGA w32 disk info': config_host.has_key('CONFIG_QGA_NTDDSCSI')}
  summary_info += {'QGA MSI support':   config_host.has_key('CONFIG_QGA_MSI_ENABLED')}
endif
summary_info += {'seccomp support':   config_host.has_key('CONFIG_SECCOMP')}
summary_info += {'coroutine backend': config_host['CONFIG_COROUTINE_BACKEND']}
summary_info += {'coroutine pool':    config_host['CONFIG_COROUTINE_POOL'] == '1'}
summary_info += {'debug stack usage': config_host.has_key('CONFIG_DEBUG_STACK_USAGE')}
summary_info += {'mutex debugging':   config_host.has_key('CONFIG_DEBUG_MUTEX')}
summary_info += {'crypto afalg':      config_host.has_key('CONFIG_AF_ALG')}
summary_info += {'GlusterFS support': config_host.has_key('CONFIG_GLUSTERFS')}
summary_info += {'gcov':              get_option('b_coverage')}
summary_info += {'TPM support':       config_host.has_key('CONFIG_TPM')}
summary_info += {'libssh support':    config_host.has_key('CONFIG_LIBSSH')}
summary_info += {'QOM debugging':     config_host.has_key('CONFIG_QOM_CAST_DEBUG')}
summary_info += {'Live block migration': config_host.has_key('CONFIG_LIVE_BLOCK_MIGRATION')}
summary_info += {'lzo support':       config_host.has_key('CONFIG_LZO')}
summary_info += {'snappy support':    config_host.has_key('CONFIG_SNAPPY')}
summary_info += {'bzip2 support':     config_host.has_key('CONFIG_BZIP2')}
summary_info += {'lzfse support':     config_host.has_key('CONFIG_LZFSE')}
summary_info += {'zstd support':      config_host.has_key('CONFIG_ZSTD')}
summary_info += {'NUMA host support': config_host.has_key('CONFIG_NUMA')}
summary_info += {'libxml2':           config_host.has_key('CONFIG_LIBXML2')}
summary_info += {'tcmalloc support':  config_host.has_key('CONFIG_TCMALLOC')}
summary_info += {'jemalloc support':  config_host.has_key('CONFIG_JEMALLOC')}
summary_info += {'avx2 optimization': config_host.has_key('CONFIG_AVX2_OPT')}
summary_info += {'avx512f optimization': config_host.has_key('CONFIG_AVX512F_OPT')}
summary_info += {'replication support': config_host.has_key('CONFIG_REPLICATION')}
summary_info += {'bochs support':     config_host.has_key('CONFIG_BOCHS')}
summary_info += {'cloop support':     config_host.has_key('CONFIG_CLOOP')}
summary_info += {'dmg support':       config_host.has_key('CONFIG_DMG')}
summary_info += {'qcow v1 support':   config_host.has_key('CONFIG_QCOW1')}
summary_info += {'vdi support':       config_host.has_key('CONFIG_VDI')}
summary_info += {'vvfat support':     config_host.has_key('CONFIG_VVFAT')}
summary_info += {'qed support':       config_host.has_key('CONFIG_QED')}
summary_info += {'parallels support': config_host.has_key('CONFIG_PARALLELS')}
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 += {'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')}
if config_host.has_key('HAVE_GDB_BIN')
  summary_info += {'gdb':             config_host['HAVE_GDB_BIN']}
endif
summary_info += {'thread sanitizer':  config_host.has_key('CONFIG_TSAN')}
summary_info += {'rng-none':          config_host.has_key('CONFIG_RNG_NONE')}
summary_info += {'Linux keyring':     config_host.has_key('CONFIG_SECRET_KEYRING')}
summary(summary_info, bool_yn: true)

if not supported_cpus.contains(cpu)
  message()
  warning('SUPPORT FOR THIS HOST CPU WILL GO AWAY IN FUTURE RELEASES!')
  message()
  message('CPU host architecture ' + cpu + ' support is not currently maintained.')
  message('The QEMU project intends to remove support for this host CPU in')
  message('a future release if nobody volunteers to maintain it and to')
  message('provide a build host for our continuous integration setup.')
  message('configure has succeeded and you can continue to build, but')
  message('if you care about QEMU on this platform you should contact')
  message('us upstream at qemu-devel@nongnu.org.')
endif

if not supported_oses.contains(targetos)
  message()
  warning('WARNING: SUPPORT FOR THIS HOST OS WILL GO AWAY IN FUTURE RELEASES!')
  message()
  message('Host OS ' + targetos + 'support is not currently maintained.')
  message('The QEMU project intends to remove support for this host OS in')
  message('a future release if nobody volunteers to maintain it and to')
  message('provide a build host for our continuous integration setup.')
  message('configure has succeeded and you can continue to build, but')
  message('if you care about QEMU on this platform you should contact')
  message('us upstream at qemu-devel@nongnu.org.')
endif