qemu-e2k/meson.build

project('qemu', ['c'], meson_version: '>=0.63.0',
        default_options: ['warning_level=1', 'c_std=gnu11', 'cpp_std=gnu++11', 'b_colorout=auto',
                          'b_staticpic=false', 'stdsplit=false', 'optimization=2', 'b_pie=true'],
        version: files('VERSION'))

add_test_setup('quick', exclude_suites: ['slow', 'thorough'], is_default: true)
add_test_setup('slow', exclude_suites: ['thorough'], env: ['G_TEST_SLOW=1', 'SPEED=slow'])
add_test_setup('thorough', env: ['G_TEST_SLOW=1', 'SPEED=thorough'])

meson.add_postconf_script(find_program('scripts/symlink-install-tree.py'))

####################
# Global variables #
####################

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

host_os = host_machine.system()
config_host = keyval.load(meson.current_build_dir() / 'config-host.mak')

# Temporary directory used for files created while
# configure runs. Since it is in the build directory
# we can safely blow away any previous version of it
# (and we need not jump through hoops to try to delete
# it when configure exits.)
tmpdir = meson.current_build_dir() / 'meson-private/temp'

if get_option('qemu_suffix').startswith('/')
  error('qemu_suffix cannot start with a /')
endif

qemu_confdir = get_option('sysconfdir') / get_option('qemu_suffix')
qemu_datadir = get_option('datadir') / get_option('qemu_suffix')
qemu_docdir = get_option('docdir') / get_option('qemu_suffix')
qemu_moddir = get_option('libdir') / get_option('qemu_suffix')

qemu_desktopdir = get_option('datadir') / 'applications'
qemu_icondir = get_option('datadir') / 'icons'

genh = []
qapi_trace_events = []

bsd_oses = ['gnu/kfreebsd', 'freebsd', 'netbsd', 'openbsd', 'dragonfly', 'darwin']
supported_oses = ['windows', 'freebsd', 'netbsd', 'openbsd', 'darwin', 'sunos', 'linux']
supported_cpus = ['ppc', 'ppc64', 's390x', 'riscv32', 'riscv64', 'x86', 'x86_64',
  'arm', 'aarch64', 'loongarch64', 'mips', 'mips64', 'sparc64']

cpu = host_machine.cpu_family()

target_dirs = config_host['TARGET_DIRS'].split()

############
# Programs #
############

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

cc = meson.get_compiler('c')
all_languages = ['c']
if host_os == 'windows' and add_languages('cpp', required: false, native: false)
  all_languages += ['cpp']
  cxx = meson.get_compiler('cpp')
endif
if host_os == 'darwin' and \
   add_languages('objc', required: true, native: false)
  all_languages += ['objc']
  objc = meson.get_compiler('objc')
endif

dtrace = not_found
stap = not_found
if 'dtrace' in get_option('trace_backends')
  dtrace = find_program('dtrace', required: true)
  stap = find_program('stap', required: false)
  if stap.found()
    # Workaround to avoid dtrace(1) producing a file with 'hidden' symbol
    # visibility. Define STAP_SDT_V2 to produce 'default' symbol visibility
    # instead. QEMU --enable-modules depends on this because the SystemTap
    # semaphores are linked into the main binary and not the module's shared
    # object.
    add_global_arguments('-DSTAP_SDT_V2',
                         native: false, language: all_languages)
  endif
endif

if get_option('iasl') == ''
  iasl = find_program('iasl', required: false)
else
  iasl = find_program(get_option('iasl'), required: true)
endif

edk2_targets = [ 'arm-softmmu', 'aarch64-softmmu', 'i386-softmmu', 'x86_64-softmmu' ]
unpack_edk2_blobs = false
foreach target : edk2_targets
  if target in target_dirs
    bzip2 = find_program('bzip2', required: get_option('install_blobs'))
    unpack_edk2_blobs = bzip2.found()
    break
  endif
endforeach

#####################
# Option validation #
#####################

# Fuzzing
if get_option('fuzzing') and get_option('fuzzing_engine') == '' and \
    not cc.links('''
          #include <stdint.h>
          #include <sys/types.h>
          int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size);
          int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) { return 0; }
        ''',
        args: ['-Werror', '-fsanitize=fuzzer'])
  error('Your compiler does not support -fsanitize=fuzzer')
endif

# Tracing backends
if 'ftrace' in get_option('trace_backends') and host_os != 'linux'
  error('ftrace is supported only on Linux')
endif
if 'syslog' in get_option('trace_backends') and not cc.compiles('''
    #include <syslog.h>
    int main(void) {
        openlog("qemu", LOG_PID, LOG_DAEMON);
        syslog(LOG_INFO, "configure");
        return 0;
    }''')
  error('syslog is not supported on this system')
endif

# Miscellaneous Linux-only features
get_option('mpath') \
  .require(host_os == 'linux', error_message: 'Multipath is supported only on Linux')

multiprocess_allowed = get_option('multiprocess') \
  .require(host_os == 'linux', error_message: 'Multiprocess QEMU is supported only on Linux') \
  .allowed()

vfio_user_server_allowed = get_option('vfio_user_server') \
  .require(host_os == 'linux', error_message: 'vfio-user server is supported only on Linux') \
  .allowed()

have_tpm = get_option('tpm') \
  .require(host_os != 'windows', error_message: 'TPM emulation only available on POSIX systems') \
  .allowed()

# vhost
have_vhost_user = get_option('vhost_user') \
  .disable_auto_if(host_os != 'linux') \
  .require(host_os != 'windows',
           error_message: 'vhost-user is not available on Windows').allowed()
have_vhost_vdpa = get_option('vhost_vdpa') \
  .require(host_os == 'linux',
           error_message: 'vhost-vdpa is only available on Linux').allowed()
have_vhost_kernel = get_option('vhost_kernel') \
  .require(host_os == 'linux',
           error_message: 'vhost-kernel is only available on Linux').allowed()
have_vhost_user_crypto = get_option('vhost_crypto') \
  .require(have_vhost_user,
           error_message: 'vhost-crypto requires vhost-user to be enabled').allowed()

have_vhost = have_vhost_user or have_vhost_vdpa or have_vhost_kernel

have_vhost_net_user = have_vhost_user and get_option('vhost_net').allowed()
have_vhost_net_vdpa = have_vhost_vdpa and get_option('vhost_net').allowed()
have_vhost_net_kernel = have_vhost_kernel and get_option('vhost_net').allowed()
have_vhost_net = have_vhost_net_kernel or have_vhost_net_user or have_vhost_net_vdpa

# type of binaries to build
have_linux_user = false
have_bsd_user = false
have_system = false
foreach target : target_dirs
  have_linux_user = have_linux_user or target.endswith('linux-user')
  have_bsd_user = have_bsd_user or target.endswith('bsd-user')
  have_system = have_system or target.endswith('-softmmu')
endforeach
have_user = have_linux_user or have_bsd_user

have_tools = get_option('tools') \
  .disable_auto_if(not have_system) \
  .allowed()
have_ga = get_option('guest_agent') \
  .disable_auto_if(not have_system and not have_tools) \
  .require(host_os in ['sunos', 'linux', 'windows', 'freebsd', 'netbsd', 'openbsd'],
           error_message: 'unsupported OS for QEMU guest agent') \
  .allowed()
have_block = have_system or have_tools

enable_modules = get_option('modules') \
  .require(host_os != 'windows',
           error_message: 'Modules are not available for Windows') \
  .require(not get_option('prefer_static'),
           error_message: 'Modules are incompatible with static linking') \
  .allowed()

#######################################
# Variables for host and accelerators #
#######################################

if cpu not in supported_cpus
  host_arch = 'unknown'
elif cpu == 'x86'
  host_arch = 'i386'
elif cpu == 'mips64'
  host_arch = 'mips'
elif cpu in ['riscv32', 'riscv64']
  host_arch = 'riscv'
else
  host_arch = cpu
endif

if cpu in ['x86', 'x86_64']
  kvm_targets = ['i386-softmmu', 'x86_64-softmmu']
elif cpu == 'aarch64'
  kvm_targets = ['aarch64-softmmu']
elif cpu == 's390x'
  kvm_targets = ['s390x-softmmu']
elif cpu in ['ppc', 'ppc64']
  kvm_targets = ['ppc-softmmu', 'ppc64-softmmu']
elif cpu in ['mips', 'mips64']
  kvm_targets = ['mips-softmmu', 'mipsel-softmmu', 'mips64-softmmu', 'mips64el-softmmu']
elif cpu in ['riscv32']
  kvm_targets = ['riscv32-softmmu']
elif cpu in ['riscv64']
  kvm_targets = ['riscv64-softmmu']
elif cpu in ['loongarch64']
  kvm_targets = ['loongarch64-softmmu']
else
  kvm_targets = []
endif
accelerator_targets = { 'CONFIG_KVM': kvm_targets }

if cpu in ['x86', 'x86_64']
  xen_targets = ['i386-softmmu', 'x86_64-softmmu']
elif cpu in ['arm', 'aarch64']
  # i386 emulator provides xenpv machine type for multiple architectures
  xen_targets = ['i386-softmmu', 'x86_64-softmmu', 'aarch64-softmmu']
else
  xen_targets = []
endif
accelerator_targets += { 'CONFIG_XEN': xen_targets }

if cpu in ['aarch64']
  accelerator_targets += {
    'CONFIG_HVF': ['aarch64-softmmu']
  }
endif

if cpu in ['x86', 'x86_64']
  accelerator_targets += {
    'CONFIG_HVF': ['x86_64-softmmu'],
    'CONFIG_NVMM': ['i386-softmmu', 'x86_64-softmmu'],
    'CONFIG_WHPX': ['i386-softmmu', 'x86_64-softmmu'],
  }
endif

modular_tcg = []
# Darwin does not support references to thread-local variables in modules
if host_os != 'darwin'
  modular_tcg = ['i386-softmmu', 'x86_64-softmmu']
endif

##################
# Compiler flags #
##################

foreach lang : all_languages
  compiler = meson.get_compiler(lang)
  if compiler.get_id() == 'gcc' and compiler.version().version_compare('>=7.4')
    # ok
  elif compiler.get_id() == 'clang' and compiler.compiles('''
      #ifdef __apple_build_version__
      # if __clang_major__ < 12 || (__clang_major__ == 12 && __clang_minor__ < 0)
      #  error You need at least XCode Clang v12.0 to compile QEMU
      # endif
      #else
      # if __clang_major__ < 10 || (__clang_major__ == 10 && __clang_minor__ < 0)
      #  error You need at least Clang v10.0 to compile QEMU
      # endif
      #endif''')
    # ok
  else
    error('You either need GCC v7.4 or Clang v10.0 (or XCode Clang v12.0) to compile QEMU')
  endif
endforeach

# default flags for all hosts
# We use -fwrapv to tell the compiler that we require a C dialect where
# left shift of signed integers is well defined and has the expected
# 2s-complement style results. (Both clang and gcc agree that it
# provides these semantics.)

qemu_common_flags = [
  '-D_GNU_SOURCE', '-D_FILE_OFFSET_BITS=64', '-D_LARGEFILE_SOURCE',
  '-fno-strict-aliasing', '-fno-common', '-fwrapv' ]
qemu_cflags = []
qemu_ldflags = []

if host_os == 'darwin'
  # Disable attempts to use ObjectiveC features in os/object.h since they
  # won't work when we're compiling with gcc as a C compiler.
  if compiler.get_id() == 'gcc'
    qemu_common_flags += '-DOS_OBJECT_USE_OBJC=0'
  endif
elif host_os == 'sunos'
  # needed for CMSG_ macros in sys/socket.h
  qemu_common_flags += '-D_XOPEN_SOURCE=600'
  # needed for TIOCWIN* defines in termios.h
  qemu_common_flags += '-D__EXTENSIONS__'
elif host_os == 'haiku'
  qemu_common_flags += ['-DB_USE_POSITIVE_POSIX_ERRORS', '-D_BSD_SOURCE', '-fPIC']
endif

# __sync_fetch_and_and requires at least -march=i486. Many toolchains
# use i686 as default anyway, but for those that don't, an explicit
# specification is necessary
if host_arch == 'i386' and not cc.links('''
  static int sfaa(int *ptr)
  {
    return __sync_fetch_and_and(ptr, 0);
  }

  int main(void)
  {
    int val = 42;
    val = __sync_val_compare_and_swap(&val, 0, 1);
    sfaa(&val);
    return val;
  }''')
  qemu_common_flags = ['-march=i486'] + qemu_common_flags
endif

if get_option('prefer_static')
  qemu_ldflags += get_option('b_pie') ? '-static-pie' : '-static'
endif

# Meson currently only handles pie as a boolean for now, so if the user
# has explicitly disabled PIE we need to extend our cflags.
#
# -no-pie is supposedly a linker flag that has no effect on the compiler
# command line, but some distros, that didn't quite know what they were
# doing, made local changes to gcc's specs file that turned it into
# a compiler command-line flag.
#
# What about linker flags?  For a static build, no PIE is implied by -static
# which we added above (and if it's not because of the same specs patching,
# there's nothing we can do: compilation will fail, report a bug to your
# distro and do not use --disable-pie in the meanwhile).  For dynamic linking,
# instead, we can't add -no-pie because it overrides -shared: the linker then
# tries to build an executable instead of a shared library and fails.  So
# don't add -no-pie anywhere and cross fingers. :(
if not get_option('b_pie')
  qemu_common_flags += cc.get_supported_arguments('-fno-pie', '-no-pie')
endif

if not get_option('stack_protector').disabled()
  stack_protector_probe = '''
    int main(int argc, char *argv[])
    {
      char arr[64], *p = arr, *c = argv[argc - 1];
      while (*c) {
          *p++ = *c++;
      }
      return 0;
    }'''
  have_stack_protector = false
  foreach arg : ['-fstack-protector-strong', '-fstack-protector-all']
    # We need to check both a compile and a link, since some compiler
    # setups fail only on a .c->.o compile and some only at link time
    if cc.compiles(stack_protector_probe, args: ['-Werror', arg]) and \
       cc.links(stack_protector_probe, args: ['-Werror', arg])
      have_stack_protector = true
      qemu_cflags += arg
      qemu_ldflags += arg
      break
    endif
  endforeach
  get_option('stack_protector') \
    .require(have_stack_protector, error_message: 'Stack protector not supported')
endif

coroutine_backend = get_option('coroutine_backend')
ucontext_probe = '''
  #include <ucontext.h>
  #ifdef __stub_makecontext
  #error Ignoring glibc stub makecontext which will always fail
  #endif
  int main(void) { makecontext(0, 0, 0); return 0; }'''

# On Windows the only valid backend is the Windows specific one.
# For POSIX prefer ucontext, but it's not always possible. The fallback
# is sigcontext.
supported_backends = []
if host_os == 'windows'
  supported_backends += ['windows']
else
  if host_os != 'darwin' and cc.links(ucontext_probe)
    supported_backends += ['ucontext']
  endif
  supported_backends += ['sigaltstack']
endif

if coroutine_backend == 'auto'
  coroutine_backend = supported_backends[0]
elif coroutine_backend not in supported_backends
  error('"@0@" backend requested but not available.  Available backends: @1@' \
        .format(coroutine_backend, ', '.join(supported_backends)))
endif

# Compiles if SafeStack *not* enabled
safe_stack_probe = '''
  int main(void)
  {
  #if defined(__has_feature)
  #if __has_feature(safe_stack)
  #error SafeStack Enabled
  #endif
  #endif
      return 0;
  }'''
if get_option('safe_stack') != not cc.compiles(safe_stack_probe)
  safe_stack_arg = get_option('safe_stack') ? '-fsanitize=safe-stack' : '-fno-sanitize=safe-stack'
  if get_option('safe_stack') != not cc.compiles(safe_stack_probe, args: safe_stack_arg)
    error(get_option('safe_stack') \
          ? 'SafeStack not supported by your compiler' \
          : 'Cannot disable SafeStack')
  endif
  qemu_cflags += safe_stack_arg
  qemu_ldflags += safe_stack_arg
endif
if get_option('safe_stack') and coroutine_backend != 'ucontext'
  error('SafeStack is only supported with the ucontext coroutine backend')
endif

if get_option('sanitizers')
  if cc.has_argument('-fsanitize=address')
    qemu_cflags = ['-fsanitize=address'] + qemu_cflags
    qemu_ldflags = ['-fsanitize=address'] + qemu_ldflags
  endif

  # Detect static linking issue with ubsan - https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84285
  if cc.links('int main(int argc, char **argv) { return argc + 1; }',
              args: [qemu_ldflags, '-fsanitize=undefined'])
    qemu_cflags = ['-fsanitize=undefined'] + qemu_cflags
    qemu_ldflags = ['-fsanitize=undefined'] + qemu_ldflags
  endif
endif

# Thread sanitizer is, for now, much noisier than the other sanitizers;
# keep it separate until that is not the case.
if get_option('tsan')
  if get_option('sanitizers')
    error('TSAN is not supported with other sanitizers')
  endif
  if not cc.has_function('__tsan_create_fiber',
                         args: '-fsanitize=thread',
                         prefix: '#include <sanitizer/tsan_interface.h>')
    error('Cannot enable TSAN due to missing fiber annotation interface')
  endif
  qemu_cflags = ['-fsanitize=thread'] + qemu_cflags
  qemu_ldflags = ['-fsanitize=thread'] + qemu_ldflags
endif

# Detect support for PT_GNU_RELRO + DT_BIND_NOW.
# The combination is known as "full relro", because .got.plt is read-only too.
qemu_ldflags += cc.get_supported_link_arguments('-Wl,-z,relro', '-Wl,-z,now')

if host_os == 'windows'
  qemu_ldflags += cc.get_supported_link_arguments('-Wl,--no-seh', '-Wl,--nxcompat')
  qemu_ldflags += cc.get_supported_link_arguments('-Wl,--dynamicbase', '-Wl,--high-entropy-va')
endif

if get_option('fuzzing')
  # Specify a filter to only instrument code that is directly related to
  # virtual-devices.
  configure_file(output: 'instrumentation-filter',
                 input: 'scripts/oss-fuzz/instrumentation-filter-template',
                 copy: true)

  if cc.compiles('int main () { return 0; }',
                  name: '-fsanitize-coverage-allowlist=/dev/null',
                 args: ['-fsanitize-coverage-allowlist=/dev/null',
                        '-fsanitize-coverage=trace-pc'] )
    qemu_common_flags += ['-fsanitize-coverage-allowlist=instrumentation-filter']
  endif

  if get_option('fuzzing_engine') == ''
    # Add CFLAGS to tell clang to add fuzzer-related instrumentation to all the
    # compiled code.  To build non-fuzzer binaries with --enable-fuzzing, link
    # everything with fsanitize=fuzzer-no-link. Otherwise, the linker will be
    # unable to bind the fuzzer-related callbacks added by instrumentation.
    qemu_common_flags += ['-fsanitize=fuzzer-no-link']
    qemu_ldflags += ['-fsanitize=fuzzer-no-link']
    # For the actual fuzzer binaries, we need to link against the libfuzzer
    # library. They need to be configurable, to support OSS-Fuzz
    fuzz_exe_ldflags = ['-fsanitize=fuzzer']
  else
    # LIB_FUZZING_ENGINE was set; assume we are running on OSS-Fuzz, and
    # the needed CFLAGS have already been provided
    fuzz_exe_ldflags = get_option('fuzzing_engine').split()
  endif
endif

if get_option('cfi')
  cfi_flags=[]
  # Check for dependency on LTO
  if not get_option('b_lto')
    error('Selected Control-Flow Integrity but LTO is disabled')
  endif
  if enable_modules
    error('Selected Control-Flow Integrity is not compatible with modules')
  endif
  # Check for cfi flags. CFI requires LTO so we can't use
  # get_supported_arguments, but need a more complex "compiles" which allows
  # custom arguments
  if cc.compiles('int main () { return 0; }', name: '-fsanitize=cfi-icall',
                 args: ['-flto', '-fsanitize=cfi-icall'] )
    cfi_flags += '-fsanitize=cfi-icall'
  else
    error('-fsanitize=cfi-icall is not supported by the compiler')
  endif
  if cc.compiles('int main () { return 0; }',
                 name: '-fsanitize-cfi-icall-generalize-pointers',
                 args: ['-flto', '-fsanitize=cfi-icall',
                        '-fsanitize-cfi-icall-generalize-pointers'] )
    cfi_flags += '-fsanitize-cfi-icall-generalize-pointers'
  else
    error('-fsanitize-cfi-icall-generalize-pointers is not supported by the compiler')
  endif
  if get_option('cfi_debug')
    if cc.compiles('int main () { return 0; }',
                   name: '-fno-sanitize-trap=cfi-icall',
                   args: ['-flto', '-fsanitize=cfi-icall',
                          '-fno-sanitize-trap=cfi-icall'] )
      cfi_flags += '-fno-sanitize-trap=cfi-icall'
    else
      error('-fno-sanitize-trap=cfi-icall is not supported by the compiler')
    endif
  endif
  add_global_arguments(cfi_flags, native: false, language: all_languages)
  add_global_link_arguments(cfi_flags, native: false, language: all_languages)
endif

# Check further flags that make QEMU more robust against malicious parties

hardening_flags = [
    # Initialize all stack variables to zero. This makes
    # it harder to take advantage of uninitialized stack
    # data to drive exploits
    '-ftrivial-auto-var-init=zero',
]

# Zero out registers used during a function call
# upon its return. This makes it harder to assemble
# ROP gadgets into something usable
#
# NB: Clang 17 is broken and SEGVs
# https://github.com/llvm/llvm-project/issues/75168
#
# NB2: This clashes with the "retguard" extension of OpenBSD's Clang
# https://gitlab.com/qemu-project/qemu/-/issues/2278
if host_os != 'openbsd' and \
   cc.compiles('extern struct { void (*cb)(void); } s; void f(void) { s.cb(); }',
               name: '-fzero-call-used-regs=used-gpr',
               args: ['-O2', '-fzero-call-used-regs=used-gpr'])
    hardening_flags += '-fzero-call-used-regs=used-gpr'
endif

qemu_common_flags += cc.get_supported_arguments(hardening_flags)

add_global_arguments(qemu_common_flags, native: false, language: all_languages)
add_global_link_arguments(qemu_ldflags, native: false, language: all_languages)

# Collect warning flags we want to set, sorted alphabetically
warn_flags = [
  # First enable interesting warnings
  '-Wempty-body',
  '-Wendif-labels',
  '-Wexpansion-to-defined',
  '-Wformat-security',
  '-Wformat-y2k',
  '-Wignored-qualifiers',
  '-Wimplicit-fallthrough=2',
  '-Winit-self',
  '-Wmissing-format-attribute',
  '-Wmissing-prototypes',
  '-Wnested-externs',
  '-Wold-style-declaration',
  '-Wold-style-definition',
  '-Wredundant-decls',
  '-Wshadow=local',
  '-Wstrict-prototypes',
  '-Wtype-limits',
  '-Wundef',
  '-Wvla',
  '-Wwrite-strings',

  # Then disable some undesirable warnings
  '-Wno-gnu-variable-sized-type-not-at-end',
  '-Wno-initializer-overrides',
  '-Wno-missing-include-dirs',
  '-Wno-psabi',
  '-Wno-shift-negative-value',
  '-Wno-string-plus-int',
  '-Wno-tautological-type-limit-compare',
  '-Wno-typedef-redefinition',
]

if host_os != 'darwin'
  warn_flags += ['-Wthread-safety']
endif

# Set up C++ compiler flags
qemu_cxxflags = []
if 'cpp' in all_languages
  qemu_cxxflags = ['-D__STDC_LIMIT_MACROS', '-D__STDC_CONSTANT_MACROS', '-D__STDC_FORMAT_MACROS'] + qemu_cflags
endif

add_project_arguments(qemu_cflags, native: false, language: 'c')
add_project_arguments(cc.get_supported_arguments(warn_flags), native: false, language: 'c')
if 'cpp' in all_languages
  add_project_arguments(qemu_cxxflags, native: false, language: 'cpp')
  add_project_arguments(cxx.get_supported_arguments(warn_flags), native: false, language: 'cpp')
endif
if 'objc' in all_languages
  # Note sanitizer flags are not applied to Objective-C sources!
  add_project_arguments(objc.get_supported_arguments(warn_flags), native: false, language: 'objc')
endif
if host_os == 'linux'
  add_project_arguments('-isystem', meson.current_source_dir() / 'linux-headers',
                        '-isystem', 'linux-headers',
                        language: all_languages)
endif

add_project_arguments('-iquote', '.',
                      '-iquote', meson.current_source_dir(),
                      '-iquote', meson.current_source_dir() / 'include',
                      language: all_languages)

# If a host-specific include directory exists, list that first...
host_include = meson.current_source_dir() / 'host/include/'
if fs.is_dir(host_include / host_arch)
  add_project_arguments('-iquote', host_include / host_arch,
                        language: all_languages)
endif
# ... followed by the generic fallback.
add_project_arguments('-iquote', host_include / 'generic',
                      language: all_languages)

sparse = find_program('cgcc', required: get_option('sparse'))
if sparse.found()
  run_target('sparse',
             command: [find_program('scripts/check_sparse.py'),
                       'compile_commands.json', sparse.full_path(), '-Wbitwise',
                       '-Wno-transparent-union', '-Wno-old-initializer',
                       '-Wno-non-pointer-null'])
endif

#####################################
# Host-specific libraries and flags #
#####################################

libm = cc.find_library('m', required: false)
threads = dependency('threads')
util = cc.find_library('util', required: false)
winmm = []
socket = []
version_res = []
coref = []
iokit = []
emulator_link_args = []
midl = not_found
widl = not_found
pathcch = not_found
host_dsosuf = '.so'
if host_os == 'windows'
  midl = find_program('midl', required: false)
  widl = find_program('widl', required: false)
  pathcch = cc.find_library('pathcch')
  socket = cc.find_library('ws2_32')
  winmm = cc.find_library('winmm')

  win = import('windows')
  version_res = win.compile_resources('version.rc',
                                      depend_files: files('pc-bios/qemu-nsis.ico'),
                                      include_directories: include_directories('.'))
  host_dsosuf = '.dll'
elif host_os == 'darwin'
  coref = dependency('appleframeworks', modules: 'CoreFoundation')
  iokit = dependency('appleframeworks', modules: 'IOKit', required: false)
  host_dsosuf = '.dylib'
elif host_os == 'sunos'
  socket = [cc.find_library('socket'),
            cc.find_library('nsl'),
            cc.find_library('resolv')]
elif host_os == 'haiku'
  socket = [cc.find_library('posix_error_mapper'),
            cc.find_library('network'),
            cc.find_library('bsd')]
elif host_os == 'openbsd'
  if get_option('tcg').allowed() and target_dirs.length() > 0
    # Disable OpenBSD W^X if available
    emulator_link_args = cc.get_supported_link_arguments('-Wl,-z,wxneeded')
  endif
endif

###############################################
# Host-specific configuration of accelerators #
###############################################

accelerators = []
if get_option('kvm').allowed() and host_os == 'linux'
  accelerators += 'CONFIG_KVM'
endif
if get_option('whpx').allowed() and host_os == 'windows'
  if get_option('whpx').enabled() and host_machine.cpu() != 'x86_64'
    error('WHPX requires 64-bit host')
  elif cc.has_header('winhvplatform.h', required: get_option('whpx')) and \
       cc.has_header('winhvemulation.h', required: get_option('whpx'))
    accelerators += 'CONFIG_WHPX'
  endif
endif

hvf = not_found
if get_option('hvf').allowed()
  hvf = dependency('appleframeworks', modules: 'Hypervisor',
                   required: get_option('hvf'))
  if hvf.found()
    accelerators += 'CONFIG_HVF'
  endif
endif

nvmm = not_found
if host_os == 'netbsd'
  nvmm = cc.find_library('nvmm', required: get_option('nvmm'))
  if nvmm.found()
    accelerators += 'CONFIG_NVMM'
  endif
endif

tcg_arch = host_arch
if get_option('tcg').allowed()
  if host_arch == 'unknown'
    if not get_option('tcg_interpreter')
      error('Unsupported CPU @0@, try --enable-tcg-interpreter'.format(cpu))
    endif
  elif get_option('tcg_interpreter')
    warning('Use of the TCG interpreter is not recommended on this host')
    warning('architecture. There is a native TCG execution backend available')
    warning('which provides substantially better performance and reliability.')
    warning('It is strongly recommended to remove the --enable-tcg-interpreter')
    warning('configuration option on this architecture to use the native')
    warning('backend.')
  endif
  if get_option('tcg_interpreter')
    tcg_arch = 'tci'
  elif host_arch == 'x86_64'
    tcg_arch = 'i386'
  elif host_arch == 'ppc64'
    tcg_arch = 'ppc'
  endif
  add_project_arguments('-iquote', meson.current_source_dir() / 'tcg' / tcg_arch,
                        language: all_languages)

  accelerators += 'CONFIG_TCG'
endif

if 'CONFIG_KVM' not in accelerators and get_option('kvm').enabled()
  error('KVM not available on this platform')
endif
if 'CONFIG_HVF' not in accelerators and get_option('hvf').enabled()
  error('HVF not available on this platform')
endif
if 'CONFIG_NVMM' not in accelerators and get_option('nvmm').enabled()
  error('NVMM not available on this platform')
endif
if 'CONFIG_WHPX' not in accelerators and get_option('whpx').enabled()
  error('WHPX not available on this platform')
endif

xen = not_found
if get_option('xen').enabled() or (get_option('xen').auto() and have_system)
  xencontrol = dependency('xencontrol', required: false,
                          method: 'pkg-config')
  if xencontrol.found()
    xen_pc = declare_dependency(version: xencontrol.version(),
      dependencies: [
        xencontrol,
        # disabler: true makes xen_pc.found() return false if any is not found
        dependency('xenstore', required: false,
                   method: 'pkg-config',
                   disabler: true),
        dependency('xenforeignmemory', required: false,
                   method: 'pkg-config',
                   disabler: true),
        dependency('xengnttab', required: false,
                   method: 'pkg-config',
                   disabler: true),
        dependency('xenevtchn', required: false,
                   method: 'pkg-config',
                   disabler: true),
        dependency('xendevicemodel', required: false,
                   method: 'pkg-config',
                   disabler: true),
        # optional, no "disabler: true"
        dependency('xentoolcore', required: false,
                   method: 'pkg-config')])
    if xen_pc.found()
      xen = xen_pc
    endif
  endif
  if not xen.found()
    xen_tests = [ '4.11.0', '4.10.0', '4.9.0', '4.8.0', '4.7.1' ]
    xen_libs = {
      '4.11.0': [ 'xenstore', 'xenctrl', 'xendevicemodel', 'xenforeignmemory', 'xengnttab', 'xenevtchn', 'xentoolcore' ],
      '4.10.0': [ 'xenstore', 'xenctrl', 'xendevicemodel', 'xenforeignmemory', 'xengnttab', 'xenevtchn', 'xentoolcore' ],
      '4.9.0': [ 'xenstore', 'xenctrl', 'xendevicemodel', 'xenforeignmemory', 'xengnttab', 'xenevtchn' ],
      '4.8.0': [ 'xenstore', 'xenctrl', 'xenforeignmemory', 'xengnttab', 'xenevtchn' ],
      '4.7.1': [ 'xenstore', 'xenctrl', 'xenforeignmemory', 'xengnttab', 'xenevtchn' ],
    }
    xen_deps = {}
    foreach ver: xen_tests
      # cache the various library tests to avoid polluting the logs
      xen_test_deps = []
      foreach l: xen_libs[ver]
        if l not in xen_deps
          xen_deps += { l: cc.find_library(l, required: false) }
        endif
        xen_test_deps += xen_deps[l]
      endforeach

      # Use -D to pick just one of the test programs in scripts/xen-detect.c
      xen_version = ver.split('.')
      xen_ctrl_version = xen_version[0] + \
        ('0' + xen_version[1]).substring(-2) + \
        ('0' + xen_version[2]).substring(-2)
      if cc.links(files('scripts/xen-detect.c'),
                  args: '-DCONFIG_XEN_CTRL_INTERFACE_VERSION=' + xen_ctrl_version,
                  dependencies: xen_test_deps)
        xen = declare_dependency(version: ver, dependencies: xen_test_deps)
        break
      endif
    endforeach
  endif
  if xen.found()
    accelerators += 'CONFIG_XEN'
  elif get_option('xen').enabled()
    error('could not compile and link Xen test program')
  endif
endif
have_xen_pci_passthrough = get_option('xen_pci_passthrough') \
  .require(xen.found(),
           error_message: 'Xen PCI passthrough requested but Xen not enabled') \
  .require(host_os == 'linux',
           error_message: 'Xen PCI passthrough not available on this platform') \
  .require(cpu == 'x86'  or cpu == 'x86_64',
           error_message: 'Xen PCI passthrough not available on this platform') \
  .allowed()

################
# Dependencies #
################

# When bumping glib minimum version, please check also whether to increase
# the _WIN32_WINNT setting in osdep.h according to the value from glib
glib_req_ver = '>=2.56.0'
glib_pc = dependency('glib-2.0', version: glib_req_ver, required: true,
                    method: 'pkg-config')
glib_cflags = []
if enable_modules
  gmodule = dependency('gmodule-export-2.0', version: glib_req_ver, required: true,
                       method: 'pkg-config')
elif get_option('plugins')
  gmodule = dependency('gmodule-no-export-2.0', version: glib_req_ver, required: true,
                       method: 'pkg-config')
else
  gmodule = not_found
endif

# This workaround is required due to a bug in pkg-config file for glib as it
# doesn't define GLIB_STATIC_COMPILATION for pkg-config --static
if host_os == 'windows' and get_option('prefer_static')
  glib_cflags += ['-DGLIB_STATIC_COMPILATION']
endif

# Sanity check that the current size_t matches the
# size that glib thinks it should be. This catches
# problems on multi-arch where people try to build
# 32-bit QEMU while pointing at 64-bit glib headers

if not cc.compiles('''
  #include <glib.h>
  #include <unistd.h>

  #define QEMU_BUILD_BUG_ON(x) \
  typedef char qemu_build_bug_on[(x)?-1:1] __attribute__((unused));

  int main(void) {
     QEMU_BUILD_BUG_ON(sizeof(size_t) != GLIB_SIZEOF_SIZE_T);
     return 0;
  }''', dependencies: glib_pc, args: glib_cflags)
  error('''sizeof(size_t) doesn't match GLIB_SIZEOF_SIZE_T.
        You probably need to set PKG_CONFIG_LIBDIR" to point
        to the right pkg-config files for your build target.''')
endif

# Silence clang warnings triggered by glib < 2.57.2
if not cc.compiles('''
  #include <glib.h>
  typedef struct Foo {
    int i;
  } Foo;
  static void foo_free(Foo *f)
  {
    g_free(f);
  }
  G_DEFINE_AUTOPTR_CLEANUP_FUNC(Foo, foo_free)
  int main(void) { return 0; }''', dependencies: glib_pc, args: ['-Wunused-function', '-Werror'])
  glib_cflags += cc.get_supported_arguments('-Wno-unused-function')
endif
glib = declare_dependency(dependencies: [glib_pc, gmodule],
                          compile_args: glib_cflags,
                          version: glib_pc.version())

# Check whether glib has gslice, which we have to avoid for correctness.
# TODO: remove this check and the corresponding workaround (qtree) when
# the minimum supported glib is >= 2.75.3
glib_has_gslice = glib.version().version_compare('<2.75.3')

# override glib dep to include the above refinements
meson.override_dependency('glib-2.0', glib)

# The path to glib.h is added to all compilation commands.
add_project_dependencies(glib.partial_dependency(compile_args: true, includes: true),
                         native: false, language: all_languages)

gio = not_found
gdbus_codegen = not_found
gdbus_codegen_error = '@0@ requires gdbus-codegen, please install libgio'
if not get_option('gio').auto() or have_system
  gio = dependency('gio-2.0', required: get_option('gio'),
                   method: 'pkg-config')
  if gio.found() and not cc.links('''
    #include <gio/gio.h>
    int main(void)
    {
      g_dbus_proxy_new_sync(0, 0, 0, 0, 0, 0, 0, 0);
      return 0;
    }''', dependencies: [glib, gio])
    if get_option('gio').enabled()
      error('The installed libgio is broken for static linking')
    endif
    gio = not_found
  endif
  if gio.found()
    gdbus_codegen = find_program(gio.get_variable('gdbus_codegen'),
                                 required: get_option('gio'))
    gio_unix = dependency('gio-unix-2.0', required: get_option('gio'),
                          method: 'pkg-config')
    gio = declare_dependency(dependencies: [gio, gio_unix],
                             version: gio.version())
  endif
endif
if gdbus_codegen.found() and get_option('cfi')
  gdbus_codegen = not_found
  gdbus_codegen_error = '@0@ uses gdbus-codegen, which does not support control flow integrity'
endif

xml_pp = find_program('scripts/xml-preprocess.py')

lttng = not_found
if 'ust' in get_option('trace_backends')
  lttng = dependency('lttng-ust', required: true, version: '>= 2.1',
                     method: 'pkg-config')
endif
pixman = not_found
if not get_option('pixman').auto() or have_system or have_tools
  pixman = dependency('pixman-1', required: get_option('pixman'), version:'>=0.21.8',
                      method: 'pkg-config')
endif

zlib = dependency('zlib', required: true)

libaio = not_found
if not get_option('linux_aio').auto() or have_block
  libaio = cc.find_library('aio', has_headers: ['libaio.h'],
                           required: get_option('linux_aio'))
endif

linux_io_uring_test = '''
  #include <liburing.h>
  #include <linux/errqueue.h>

  int main(void) { return 0; }'''

linux_io_uring = not_found
if not get_option('linux_io_uring').auto() or have_block
  linux_io_uring = dependency('liburing', version: '>=0.3',
                              required: get_option('linux_io_uring'),
                              method: 'pkg-config')
  if not cc.links(linux_io_uring_test)
    linux_io_uring = not_found
  endif
endif

libnfs = not_found
if not get_option('libnfs').auto() or have_block
  libnfs = dependency('libnfs', version: '>=1.9.3',
                      required: get_option('libnfs'),
                      method: 'pkg-config')
endif

libattr_test = '''
  #include <stddef.h>
  #include <sys/types.h>
  #ifdef CONFIG_LIBATTR
  #include <attr/xattr.h>
  #else
  #include <sys/xattr.h>
  #endif
  int main(void) { getxattr(NULL, NULL, NULL, 0); setxattr(NULL, NULL, NULL, 0, 0); return 0; }'''

libattr = not_found
have_old_libattr = false
if get_option('attr').allowed()
  if cc.links(libattr_test)
    libattr = declare_dependency()
  else
    libattr = cc.find_library('attr', has_headers: ['attr/xattr.h'],
                              required: get_option('attr'))
    if libattr.found() and not \
      cc.links(libattr_test, dependencies: libattr, args: '-DCONFIG_LIBATTR')
      libattr = not_found
      if get_option('attr').enabled()
        error('could not link libattr')
      else
        warning('could not link libattr, disabling')
      endif
    else
      have_old_libattr = libattr.found()
    endif
  endif
endif

cocoa = dependency('appleframeworks', modules: ['Cocoa', 'CoreVideo'],
                   required: get_option('cocoa'))

vmnet = dependency('appleframeworks', modules: 'vmnet', required: get_option('vmnet'))
if vmnet.found() and not cc.has_header_symbol('vmnet/vmnet.h',
                                              'VMNET_BRIDGED_MODE',
                                              dependencies: vmnet)
  vmnet = not_found
  if get_option('vmnet').enabled()
    error('vmnet.framework API is outdated')
  else
    warning('vmnet.framework API is outdated, disabling')
  endif
endif

seccomp = not_found
seccomp_has_sysrawrc = false
if not get_option('seccomp').auto() or have_system or have_tools
  seccomp = dependency('libseccomp', version: '>=2.3.0',
                       required: get_option('seccomp'),
                       method: 'pkg-config')
  if seccomp.found()
    seccomp_has_sysrawrc = cc.has_header_symbol('seccomp.h',
                                                'SCMP_FLTATR_API_SYSRAWRC',
                                                dependencies: seccomp)
  endif
endif

libcap_ng = not_found
if not get_option('cap_ng').auto() or have_system or have_tools
  libcap_ng = cc.find_library('cap-ng', has_headers: ['cap-ng.h'],
                              required: get_option('cap_ng'))
endif
if libcap_ng.found() and not cc.links('''
   #include <cap-ng.h>
   int main(void)
   {
     capng_capability_to_name(CAPNG_EFFECTIVE);
     return 0;
   }''', dependencies: libcap_ng)
  libcap_ng = not_found
  if get_option('cap_ng').enabled()
    error('could not link libcap-ng')
  else
    warning('could not link libcap-ng, disabling')
  endif
endif

if get_option('xkbcommon').auto() and not have_system and not have_tools
  xkbcommon = not_found
else
  xkbcommon = dependency('xkbcommon', required: get_option('xkbcommon'),
                         method: 'pkg-config')
endif

slirp = not_found
if not get_option('slirp').auto() or have_system
  slirp = dependency('slirp', required: get_option('slirp'),
                     method: 'pkg-config')
  # slirp < 4.7 is incompatible with CFI support in QEMU.  This is because
  # it passes function pointers within libslirp as callbacks for timers.
  # When using a system-wide shared libslirp, the type information for the
  # callback is missing and the timer call produces a false positive with CFI.
  # Do not use the "version" keyword argument to produce a better error.
  # with control-flow integrity.
  if get_option('cfi') and slirp.found() and slirp.version().version_compare('<4.7')
    if get_option('slirp').enabled()
      error('Control-Flow Integrity requires libslirp 4.7.')
    else
      warning('Cannot use libslirp since Control-Flow Integrity requires libslirp >= 4.7.')
      slirp = not_found
    endif
  endif
endif

vde = not_found
if not get_option('vde').auto() or have_system or have_tools
  vde = cc.find_library('vdeplug', has_headers: ['libvdeplug.h'],
                           required: get_option('vde'))
endif
if vde.found() and not cc.links('''
   #include <libvdeplug.h>
   int main(void)
   {
     struct vde_open_args a = {0, 0, 0};
     char s[] = "";
     vde_open(s, s, &a);
     return 0;
   }''', dependencies: vde)
  vde = not_found
  if get_option('cap_ng').enabled()
    error('could not link libvdeplug')
  else
    warning('could not link libvdeplug, disabling')
  endif
endif

pulse = not_found
if not get_option('pa').auto() or (host_os == 'linux' and have_system)
  pulse = dependency('libpulse', required: get_option('pa'),
                     method: 'pkg-config')
endif
alsa = not_found
if not get_option('alsa').auto() or (host_os == 'linux' and have_system)
  alsa = dependency('alsa', required: get_option('alsa'),
                    method: 'pkg-config')
endif
jack = not_found
if not get_option('jack').auto() or have_system
  jack = dependency('jack', required: get_option('jack'),
                    method: 'pkg-config')
endif
pipewire = not_found
if not get_option('pipewire').auto() or (host_os == 'linux' and have_system)
  pipewire = dependency('libpipewire-0.3', version: '>=0.3.60',
                    required: get_option('pipewire'),
                    method: 'pkg-config')
endif
sndio = not_found
if not get_option('sndio').auto() or have_system
  sndio = dependency('sndio', required: get_option('sndio'),
                    method: 'pkg-config')
endif

spice_protocol = not_found
if not get_option('spice_protocol').auto() or have_system
  spice_protocol = dependency('spice-protocol', version: '>=0.14.0',
                              required: get_option('spice_protocol'),
                              method: 'pkg-config')
endif
spice = not_found
if get_option('spice') \
             .disable_auto_if(not have_system) \
             .require(pixman.found(),
                      error_message: 'cannot enable SPICE if pixman is not available') \
             .allowed()
  spice = dependency('spice-server', version: '>=0.14.0',
                     required: get_option('spice'),
                     method: 'pkg-config')
endif
spice_headers = spice.partial_dependency(compile_args: true, includes: true)

rt = cc.find_library('rt', required: false)

libiscsi = not_found
if not get_option('libiscsi').auto() or have_block
  libiscsi = dependency('libiscsi', version: '>=1.9.0',
                         required: get_option('libiscsi'),
                         method: 'pkg-config')
endif
zstd = not_found
if not get_option('zstd').auto() or have_block
  zstd = dependency('libzstd', version: '>=1.4.0',
                    required: get_option('zstd'),
                    method: 'pkg-config')
endif
virgl = not_found

have_vhost_user_gpu = have_tools and host_os == 'linux' and pixman.found()
if not get_option('virglrenderer').auto() or have_system or have_vhost_user_gpu
  virgl = dependency('virglrenderer',
                     method: 'pkg-config',
                     required: get_option('virglrenderer'))
endif
rutabaga = not_found
if not get_option('rutabaga_gfx').auto() or have_system or have_vhost_user_gpu
  rutabaga = dependency('rutabaga_gfx_ffi',
                         method: 'pkg-config',
                         required: get_option('rutabaga_gfx'))
endif
blkio = not_found
if not get_option('blkio').auto() or have_block
  blkio = dependency('blkio',
                     method: 'pkg-config',
                     required: get_option('blkio'))
endif
curl = not_found
if not get_option('curl').auto() or have_block
  curl = dependency('libcurl', version: '>=7.29.0',
                    method: 'pkg-config',
                    required: get_option('curl'))
endif
libudev = not_found
if host_os == 'linux' and (have_system or have_tools)
  libudev = dependency('libudev',
                       method: 'pkg-config',
                       required: get_option('libudev'))
endif

mpathlibs = [libudev]
mpathpersist = not_found
if host_os == 'linux' and have_tools and get_option('mpath').allowed()
  mpath_test_source = '''
    #include <libudev.h>
    #include <mpath_persist.h>
    unsigned mpath_mx_alloc_len = 1024;
    int logsink;
    static struct config *multipath_conf;
    extern struct udev *udev;
    extern struct config *get_multipath_config(void);
    extern void put_multipath_config(struct config *conf);
    struct udev *udev;
    struct config *get_multipath_config(void) { return multipath_conf; }
    void put_multipath_config(struct config *conf) { }
    int main(void) {
        udev = udev_new();
        multipath_conf = mpath_lib_init();
        return 0;
    }'''
  libmpathpersist = cc.find_library('mpathpersist',
                                    required: get_option('mpath'))
  if libmpathpersist.found()
    mpathlibs += libmpathpersist
    if get_option('prefer_static')
      mpathlibs += cc.find_library('devmapper',
                                     required: get_option('mpath'))
    endif
    mpathlibs += cc.find_library('multipath',
                                 required: get_option('mpath'))
    foreach lib: mpathlibs
      if not lib.found()
        mpathlibs = []
        break
      endif
    endforeach
    if mpathlibs.length() == 0
      msg = 'Dependencies missing for libmpathpersist'
    elif cc.links(mpath_test_source, dependencies: mpathlibs)
      mpathpersist = declare_dependency(dependencies: mpathlibs)
    else
      msg = 'Cannot detect libmpathpersist API'
    endif
    if not mpathpersist.found()
      if get_option('mpath').enabled()
        error(msg)
      else
        warning(msg + ', disabling')
      endif
    endif
  endif
endif

iconv = not_found
curses = not_found
if have_system and get_option('curses').allowed()
  curses_test = '''
    #if defined(__APPLE__) || defined(__OpenBSD__)
    #define _XOPEN_SOURCE_EXTENDED 1
    #endif
    #include <locale.h>
    #include <curses.h>
    #include <wchar.h>
    int main(void) {
      wchar_t wch = L'w';
      setlocale(LC_ALL, "");
      resize_term(0, 0);
      addwstr(L"wide chars\n");
      addnwstr(&wch, 1);
      add_wch(WACS_DEGREE);
      return 0;
    }'''

  curses_dep_list = host_os == 'windows' ? ['ncurses', 'ncursesw'] : ['ncursesw']
  curses = dependency(curses_dep_list,
                      required: false,
                      method: 'pkg-config')
  msg = get_option('curses').enabled() ? 'curses library not found' : ''
  curses_compile_args = ['-DNCURSES_WIDECHAR=1']
  if curses.found()
    if cc.links(curses_test, args: curses_compile_args, dependencies: [curses])
      curses = declare_dependency(compile_args: curses_compile_args, dependencies: [curses],
                                  version: curses.version())
    else
      msg = 'curses package not usable'
      curses = not_found
    endif
  endif
  if not curses.found()
    has_curses_h = cc.has_header('curses.h', args: curses_compile_args)
    if host_os != 'windows' and not has_curses_h
      message('Trying with /usr/include/ncursesw')
      curses_compile_args += ['-I/usr/include/ncursesw']
      has_curses_h = cc.has_header('curses.h', args: curses_compile_args)
    endif
    if has_curses_h
      curses_libname_list = (host_os == 'windows' ? ['pdcurses'] : ['ncursesw', 'cursesw'])
      foreach curses_libname : curses_libname_list
        libcurses = cc.find_library(curses_libname,
                                    required: false)
        if libcurses.found()
          if cc.links(curses_test, args: curses_compile_args, dependencies: libcurses)
            curses = declare_dependency(compile_args: curses_compile_args,
                                        dependencies: [libcurses])
            break
          else
            msg = 'curses library not usable'
          endif
        endif
      endforeach
    endif
  endif
  if get_option('iconv').allowed()
    foreach link_args : [ ['-liconv'], [] ]
      # Programs will be linked with glib and this will bring in libiconv on FreeBSD.
      # We need to use libiconv if available because mixing libiconv's headers with
      # the system libc does not work.
      # However, without adding glib to the dependencies -L/usr/local/lib will not be
      # included in the command line and libiconv will not be found.
      if cc.links('''
        #include <iconv.h>
        int main(void) {
          iconv_t conv = iconv_open("WCHAR_T", "UCS-2");
          return conv != (iconv_t) -1;
        }''', args: link_args, dependencies: glib)
        iconv = declare_dependency(link_args: link_args, dependencies: glib)
        break
      endif
    endforeach
  endif
  if curses.found() and not iconv.found()
    if get_option('iconv').enabled()
      error('iconv not available')
    endif
    msg = 'iconv required for curses UI but not available'
    curses = not_found
  endif
  if not curses.found() and msg != ''
    if get_option('curses').enabled()
      error(msg)
    else
      warning(msg + ', disabling')
    endif
  endif
endif

brlapi = not_found
if not get_option('brlapi').auto() or have_system
  brlapi = cc.find_library('brlapi', has_headers: ['brlapi.h'],
                         required: get_option('brlapi'))
  if brlapi.found() and not cc.links('''
     #include <brlapi.h>
     #include <stddef.h>
     int main(void) { return brlapi__openConnection (NULL, NULL, NULL); }''', dependencies: brlapi)
    brlapi = not_found
    if get_option('brlapi').enabled()
      error('could not link brlapi')
    else
      warning('could not link brlapi, disabling')
    endif
  endif
endif

sdl = not_found
if not get_option('sdl').auto() or have_system
  sdl = dependency('sdl2', required: get_option('sdl'))
  sdl_image = not_found
endif
if sdl.found()
  # Some versions of SDL have problems with -Wundef
  if not cc.compiles('''
                     #include <SDL.h>
                     #include <SDL_syswm.h>
                     int main(int argc, char *argv[]) { return 0; }
                     ''', dependencies: sdl, args: '-Werror=undef')
    sdl = declare_dependency(compile_args: '-Wno-undef',
                             dependencies: sdl,
                             version: sdl.version())
  endif
  sdl_image = dependency('SDL2_image', required: get_option('sdl_image'),
                         method: 'pkg-config')
else
  if get_option('sdl_image').enabled()
    error('sdl-image required, but SDL was @0@'.format(
          get_option('sdl').disabled() ? 'disabled' : 'not found'))
  endif
  sdl_image = not_found
endif

rbd = not_found
if not get_option('rbd').auto() or have_block
  librados = cc.find_library('rados', required: get_option('rbd'))
  librbd = cc.find_library('rbd', has_headers: ['rbd/librbd.h'],
                           required: get_option('rbd'))
  if librados.found() and librbd.found()
    if cc.links('''
      #include <stdio.h>
      #include <rbd/librbd.h>
      int main(void) {
        rados_t cluster;
        rados_create(&cluster, NULL);
        #if LIBRBD_VERSION_CODE < LIBRBD_VERSION(1, 12, 0)
        #error
        #endif
        return 0;
      }''', dependencies: [librbd, librados])
      rbd = declare_dependency(dependencies: [librbd, librados])
    elif get_option('rbd').enabled()
      error('librbd >= 1.12.0 required')
    else
      warning('librbd >= 1.12.0 not found, disabling')
    endif
  endif
endif

glusterfs = not_found
glusterfs_ftruncate_has_stat = false
glusterfs_iocb_has_stat = false
if not get_option('glusterfs').auto() or have_block
  glusterfs = dependency('glusterfs-api', version: '>=3',
                         required: get_option('glusterfs'),
                         method: 'pkg-config')
  if glusterfs.found()
    glusterfs_ftruncate_has_stat = cc.links('''
      #include <glusterfs/api/glfs.h>

      int
      main(void)
      {
          /* new glfs_ftruncate() passes two additional args */
          return glfs_ftruncate(NULL, 0, NULL, NULL);
      }
    ''', dependencies: glusterfs)
    glusterfs_iocb_has_stat = cc.links('''
      #include <glusterfs/api/glfs.h>

      /* new glfs_io_cbk() passes two additional glfs_stat structs */
      static void
      glusterfs_iocb(glfs_fd_t *fd, ssize_t ret, struct glfs_stat *prestat, struct glfs_stat *poststat, void *data)
      {}

      int
      main(void)
      {
          glfs_io_cbk iocb = &glusterfs_iocb;
          iocb(NULL, 0 , NULL, NULL, NULL);
          return 0;
      }
    ''', dependencies: glusterfs)
  endif
endif

hv_balloon = false
if get_option('hv_balloon').allowed() and have_system
  if cc.links('''
    #include <string.h>
    #include <gmodule.h>
    int main(void) {
        GTree *tree;

        tree = g_tree_new((GCompareFunc)strcmp);
        (void)g_tree_node_first(tree);
        g_tree_destroy(tree);
        return 0;
    }
  ''', dependencies: glib)
    hv_balloon = true
  else
    if get_option('hv_balloon').enabled()
      error('could not enable hv-balloon, update your glib')
    else
      warning('could not find glib support for hv-balloon, disabling')
    endif
  endif
endif

libssh = not_found
if not get_option('libssh').auto() or have_block
  libssh = dependency('libssh', version: '>=0.8.7',
                    method: 'pkg-config',
                    required: get_option('libssh'))
endif

libbzip2 = not_found
if not get_option('bzip2').auto() or have_block
  libbzip2 = cc.find_library('bz2', has_headers: ['bzlib.h'],
                             required: get_option('bzip2'))
  if libbzip2.found() and not cc.links('''
     #include <bzlib.h>
     int main(void) { BZ2_bzlibVersion(); return 0; }''', dependencies: libbzip2)
    libbzip2 = not_found
    if get_option('bzip2').enabled()
      error('could not link libbzip2')
    else
      warning('could not link libbzip2, disabling')
    endif
  endif
endif

liblzfse = not_found
if not get_option('lzfse').auto() or have_block
  liblzfse = cc.find_library('lzfse', has_headers: ['lzfse.h'],
                             required: get_option('lzfse'))
endif
if liblzfse.found() and not cc.links('''
   #include <lzfse.h>
   int main(void) { lzfse_decode_scratch_size(); return 0; }''', dependencies: liblzfse)
  liblzfse = not_found
  if get_option('lzfse').enabled()
    error('could not link liblzfse')
  else
    warning('could not link liblzfse, disabling')
  endif
endif

oss = not_found
if get_option('oss').allowed() and have_system
  if not cc.has_header('sys/soundcard.h')
    # not found
  elif host_os == 'netbsd'
    oss = cc.find_library('ossaudio', required: get_option('oss'))
  else
    oss = declare_dependency()
  endif

  if not oss.found()
    if get_option('oss').enabled()
      error('OSS not found')
    endif
  endif
endif
dsound = not_found
if not get_option('dsound').auto() or (host_os == 'windows' and have_system)
  if cc.has_header('dsound.h')
    dsound = declare_dependency(link_args: ['-lole32', '-ldxguid'])
  endif

  if not dsound.found()
    if get_option('dsound').enabled()
      error('DirectSound not found')
    endif
  endif
endif

coreaudio = not_found
if not get_option('coreaudio').auto() or (host_os == 'darwin' and have_system)
  coreaudio = dependency('appleframeworks', modules: 'CoreAudio',
                         required: get_option('coreaudio'))
endif

opengl = not_found
if not get_option('opengl').auto() or have_system or have_vhost_user_gpu
  epoxy = dependency('epoxy', method: 'pkg-config',
                      required: get_option('opengl'))
  if cc.has_header('epoxy/egl.h', dependencies: epoxy)
    opengl = epoxy
  elif get_option('opengl').enabled()
    error('epoxy/egl.h not found')
  endif
endif
gbm = not_found
if (have_system or have_tools) and (virgl.found() or opengl.found())
  gbm = dependency('gbm', method: 'pkg-config', required: false)
endif
have_vhost_user_gpu = have_vhost_user_gpu and virgl.found() and opengl.found() and gbm.found()

gnutls = not_found
gnutls_crypto = not_found
if get_option('gnutls').enabled() or (get_option('gnutls').auto() and have_system)
  # For general TLS support our min gnutls matches
  # that implied by our platform support matrix
  #
  # For the crypto backends, we look for a newer
  # gnutls:
  #
  #   Version 3.6.8  is needed to get XTS
  #   Version 3.6.13 is needed to get PBKDF
  #   Version 3.6.14 is needed to get HW accelerated XTS
  #
  # If newer enough gnutls isn't available, we can
  # still use a different crypto backend to satisfy
  # the platform support requirements
  gnutls_crypto = dependency('gnutls', version: '>=3.6.14',
                             method: 'pkg-config',
                             required: false)
  if gnutls_crypto.found()
    gnutls = gnutls_crypto
  else
    # Our min version if all we need is TLS
    gnutls = dependency('gnutls', version: '>=3.5.18',
                        method: 'pkg-config',
                        required: get_option('gnutls'))
  endif
endif

# We prefer use of gnutls for crypto, unless the options
# explicitly asked for nettle or gcrypt.
#
# If gnutls isn't available for crypto, then we'll prefer
# gcrypt over nettle for performance reasons.
gcrypt = not_found
nettle = not_found
hogweed = not_found
crypto_sm4 = not_found
xts = 'none'

if get_option('nettle').enabled() and get_option('gcrypt').enabled()
  error('Only one of gcrypt & nettle can be enabled')
endif

# Explicit nettle/gcrypt request, so ignore gnutls for crypto
if get_option('nettle').enabled() or get_option('gcrypt').enabled()
  gnutls_crypto = not_found
endif

if not gnutls_crypto.found()
  if (not get_option('gcrypt').auto() or have_system) and not get_option('nettle').enabled()
    gcrypt = dependency('libgcrypt', version: '>=1.8',
                        method: 'config-tool',
                        required: get_option('gcrypt'))
    # Debian has removed -lgpg-error from libgcrypt-config
    # as it "spreads unnecessary dependencies" which in
    # turn breaks static builds...
    if gcrypt.found() and get_option('prefer_static')
      gcrypt = declare_dependency(dependencies:
        [gcrypt,
         cc.find_library('gpg-error', required: true)],
        version: gcrypt.version())
    endif
    crypto_sm4 = gcrypt
    # SM4 ALG is available in libgcrypt >= 1.9
    if gcrypt.found() and not cc.links('''
      #include <gcrypt.h>
      int main(void) {
        gcry_cipher_hd_t handler;
        gcry_cipher_open(&handler, GCRY_CIPHER_SM4, GCRY_CIPHER_MODE_ECB, 0);
        return 0;
      }''', dependencies: gcrypt)
      crypto_sm4 = not_found
    endif
  endif
  if (not get_option('nettle').auto() or have_system) and not gcrypt.found()
    nettle = dependency('nettle', version: '>=3.4',
                        method: 'pkg-config',
                        required: get_option('nettle'))
    if nettle.found() and not cc.has_header('nettle/xts.h', dependencies: nettle)
      xts = 'private'
    endif
    crypto_sm4 = nettle
    # SM4 ALG is available in nettle >= 3.9
    if nettle.found() and not cc.links('''
      #include <nettle/sm4.h>
      int main(void) {
        struct sm4_ctx ctx;
        unsigned char key[16] = {0};
        sm4_set_encrypt_key(&ctx, key);
        return 0;
      }''', dependencies: nettle)
      crypto_sm4 = not_found
    endif
  endif
endif

capstone = not_found
if not get_option('capstone').auto() or have_system or have_user
  capstone = dependency('capstone', version: '>=3.0.5',
                        method: 'pkg-config',
                        required: get_option('capstone'))

  # Some versions of capstone have broken pkg-config file
  # that reports a wrong -I path, causing the #include to
  # fail later. If the system has such a broken version
  # do not use it.
  if capstone.found() and not cc.compiles('#include <capstone.h>',
                                          dependencies: [capstone])
    capstone = not_found
    if get_option('capstone').enabled()
      error('capstone requested, but it does not appear to work')
    endif
  endif
endif

gmp = dependency('gmp', required: false, method: 'pkg-config')
if nettle.found() and gmp.found()
  hogweed = dependency('hogweed', version: '>=3.4',
                       method: 'pkg-config',
                       required: get_option('nettle'))
endif


gtk = not_found
gtkx11 = not_found
vte = not_found
have_gtk_clipboard = get_option('gtk_clipboard').enabled()

if get_option('gtk') \
             .disable_auto_if(not have_system) \
             .require(pixman.found(),
                      error_message: 'cannot enable GTK if pixman is not available') \
             .allowed()
  gtk = dependency('gtk+-3.0', version: '>=3.22.0',
                   method: 'pkg-config',
                   required: get_option('gtk'))
  if gtk.found()
    gtkx11 = dependency('gtk+-x11-3.0', version: '>=3.22.0',
                        method: 'pkg-config',
                        required: false)
    gtk = declare_dependency(dependencies: [gtk, gtkx11],
                             version: gtk.version())

    if not get_option('vte').auto() or have_system
      vte = dependency('vte-2.91',
                       method: 'pkg-config',
                       required: get_option('vte'))
    endif
  elif have_gtk_clipboard
    error('GTK clipboard requested, but GTK not found')
  endif
endif

x11 = not_found
if gtkx11.found()
  x11 = dependency('x11', method: 'pkg-config', required: gtkx11.found())
endif
png = not_found
if get_option('png').allowed() and have_system
   png = dependency('libpng', version: '>=1.6.34', required: get_option('png'),
                    method: 'pkg-config')
endif
vnc = not_found
jpeg = not_found
sasl = not_found
if get_option('vnc') \
             .disable_auto_if(not have_system) \
             .require(pixman.found(),
                      error_message: 'cannot enable VNC if pixman is not available') \
             .allowed()
  vnc = declare_dependency() # dummy dependency
  jpeg = dependency('libjpeg', required: get_option('vnc_jpeg'),
                    method: 'pkg-config')
  sasl = cc.find_library('sasl2', has_headers: ['sasl/sasl.h'],
                         required: get_option('vnc_sasl'))
  if sasl.found()
    sasl = declare_dependency(dependencies: sasl,
                              compile_args: '-DSTRUCT_IOVEC_DEFINED')
  endif
endif

pam = not_found
if not get_option('auth_pam').auto() or have_system
  pam = cc.find_library('pam', has_headers: ['security/pam_appl.h'],
                        required: get_option('auth_pam'))
endif
if pam.found() and not cc.links('''
   #include <stddef.h>
   #include <security/pam_appl.h>
   int main(void) {
     const char *service_name = "qemu";
     const char *user = "frank";
     const struct pam_conv pam_conv = { 0 };
     pam_handle_t *pamh = NULL;
     pam_start(service_name, user, &pam_conv, &pamh);
     return 0;
   }''', dependencies: pam)
  pam = not_found
  if get_option('auth_pam').enabled()
    error('could not link libpam')
  else
    warning('could not link libpam, disabling')
  endif
endif

snappy = not_found
if not get_option('snappy').auto() or have_system
  snappy = cc.find_library('snappy', has_headers: ['snappy-c.h'],
                           required: get_option('snappy'))
endif
if snappy.found() and not cc.links('''
   #include <snappy-c.h>
   int main(void) { snappy_max_compressed_length(4096); return 0; }''', dependencies: snappy)
  snappy = not_found
  if get_option('snappy').enabled()
    error('could not link libsnappy')
  else
    warning('could not link libsnappy, disabling')
  endif
endif

lzo = not_found
if not get_option('lzo').auto() or have_system
  lzo = cc.find_library('lzo2', has_headers: ['lzo/lzo1x.h'],
                        required: get_option('lzo'))
endif
if lzo.found() and not cc.links('''
   #include <lzo/lzo1x.h>
   int main(void) { lzo_version(); return 0; }''', dependencies: lzo)
  lzo = not_found
  if get_option('lzo').enabled()
    error('could not link liblzo2')
  else
    warning('could not link liblzo2, disabling')
  endif
endif

numa = not_found
if not get_option('numa').auto() or have_system or have_tools
  numa = cc.find_library('numa', has_headers: ['numa.h'],
                              required: get_option('numa'))
endif
if numa.found() and not cc.links('''
   #include <numa.h>
   int main(void) { return numa_available(); }
   ''', dependencies: numa)
  numa = not_found
  if get_option('numa').enabled()
    error('could not link numa')
  else
    warning('could not link numa, disabling')
  endif
endif

rdma = not_found
if not get_option('rdma').auto() or have_system
  libumad = cc.find_library('ibumad', required: get_option('rdma'))
  rdma_libs = [cc.find_library('rdmacm', has_headers: ['rdma/rdma_cma.h'],
                               required: get_option('rdma')),
               cc.find_library('ibverbs', required: get_option('rdma')),
               libumad]
  rdma = declare_dependency(dependencies: rdma_libs)
  foreach lib: rdma_libs
    if not lib.found()
      rdma = not_found
    endif
  endforeach
endif

cacard = not_found
if not get_option('smartcard').auto() or have_system
  cacard = dependency('libcacard', required: get_option('smartcard'),
                      version: '>=2.5.1', method: 'pkg-config')
endif
u2f = not_found
if not get_option('u2f').auto() or have_system
  u2f = dependency('u2f-emu', required: get_option('u2f'),
                   method: 'pkg-config')
endif
canokey = not_found
if not get_option('canokey').auto() or have_system
  canokey = dependency('canokey-qemu', required: get_option('canokey'),
                   method: 'pkg-config')
endif
usbredir = not_found
if not get_option('usb_redir').auto() or have_system
  usbredir = dependency('libusbredirparser-0.5', required: get_option('usb_redir'),
                        version: '>=0.6', method: 'pkg-config')
endif
libusb = not_found
if not get_option('libusb').auto() or have_system
  libusb = dependency('libusb-1.0', required: get_option('libusb'),
                      version: '>=1.0.13', method: 'pkg-config')
endif

libpmem = not_found
if not get_option('libpmem').auto() or have_system
  libpmem = dependency('libpmem', required: get_option('libpmem'),
                       method: 'pkg-config')
endif
libdaxctl = not_found
if not get_option('libdaxctl').auto() or have_system
  libdaxctl = dependency('libdaxctl', required: get_option('libdaxctl'),
                         version: '>=57', method: 'pkg-config')
endif
tasn1 = not_found
if gnutls.found()
  tasn1 = dependency('libtasn1',
                     method: 'pkg-config')
endif
keyutils = not_found
if not get_option('libkeyutils').auto() or have_block
  keyutils = dependency('libkeyutils', required: get_option('libkeyutils'),
                        method: 'pkg-config')
endif

has_gettid = cc.has_function('gettid')

# libselinux
selinux = dependency('libselinux',
                     required: get_option('selinux'),
                     method: 'pkg-config')

# Malloc tests

malloc = []
if get_option('malloc') == 'system'
  has_malloc_trim = \
    get_option('malloc_trim').allowed() and \
    cc.has_function('malloc_trim', prefix: '#include <malloc.h>')
else
  has_malloc_trim = false
  malloc = cc.find_library(get_option('malloc'), required: true)
endif
if not has_malloc_trim and get_option('malloc_trim').enabled()
  if get_option('malloc') == 'system'
    error('malloc_trim not available on this platform.')
  else
    error('malloc_trim not available with non-libc memory allocator')
  endif
endif

gnu_source_prefix = '''
  #ifndef _GNU_SOURCE
  #define _GNU_SOURCE
  #endif
'''

# Check whether the glibc provides STATX_BASIC_STATS

has_statx = cc.has_header_symbol('sys/stat.h', 'STATX_BASIC_STATS', prefix: gnu_source_prefix)

# Check whether statx() provides mount ID information

has_statx_mnt_id = cc.has_header_symbol('sys/stat.h', 'STATX_MNT_ID', prefix: gnu_source_prefix)

have_vhost_user_blk_server = get_option('vhost_user_blk_server') \
  .require(host_os == 'linux',
           error_message: 'vhost_user_blk_server requires linux') \
  .require(have_vhost_user,
           error_message: 'vhost_user_blk_server requires vhost-user support') \
  .disable_auto_if(not have_tools and not have_system) \
  .allowed()

if get_option('fuse').disabled() and get_option('fuse_lseek').enabled()
  error('Cannot enable fuse-lseek while fuse is disabled')
endif

fuse = dependency('fuse3', required: get_option('fuse'),
                  version: '>=3.1', method: 'pkg-config')

fuse_lseek = not_found
if get_option('fuse_lseek').allowed()
  if fuse.version().version_compare('>=3.8')
    # Dummy dependency
    fuse_lseek = declare_dependency()
  elif get_option('fuse_lseek').enabled()
    if fuse.found()
      error('fuse-lseek requires libfuse >=3.8, found ' + fuse.version())
    else
      error('fuse-lseek requires libfuse, which was not found')
    endif
  endif
endif

have_libvduse = (host_os == 'linux')
if get_option('libvduse').enabled()
    if host_os != 'linux'
        error('libvduse requires linux')
    endif
elif get_option('libvduse').disabled()
    have_libvduse = false
endif

have_vduse_blk_export = (have_libvduse and host_os == 'linux')
if get_option('vduse_blk_export').enabled()
    if host_os != 'linux'
        error('vduse_blk_export requires linux')
    elif not have_libvduse
        error('vduse_blk_export requires libvduse support')
    endif
elif get_option('vduse_blk_export').disabled()
    have_vduse_blk_export = false
endif

# libbpf
bpf_version = '1.1.0'
libbpf = dependency('libbpf', version: '>=' + bpf_version, required: get_option('bpf'), method: 'pkg-config')
if libbpf.found() and not cc.links('''
   #include <bpf/libbpf.h>
   #include <linux/bpf.h>
   int main(void)
   {
     // check flag availability
     int flag = BPF_F_MMAPABLE;
     bpf_object__destroy_skeleton(NULL);
     return 0;
   }''', dependencies: libbpf)
  libbpf = not_found
  if get_option('bpf').enabled()
    error('libbpf skeleton/mmaping test failed')
  else
    warning('libbpf skeleton/mmaping test failed, disabling')
  endif
endif

# libxdp
libxdp = not_found
if not get_option('af_xdp').auto() or have_system
    libxdp = dependency('libxdp', required: get_option('af_xdp'),
                        version: '>=1.4.0', method: 'pkg-config')
endif

# libdw
libdw = not_found
if not get_option('libdw').auto() or \
        (not get_option('prefer_static') and (have_system or have_user))
    libdw = dependency('libdw',
                       method: 'pkg-config',
                       required: get_option('libdw'))
endif

#################
# config-host.h #
#################

config_host_data = configuration_data()

audio_drivers_selected = []
if have_system
  audio_drivers_available = {
    'alsa': alsa.found(),
    'coreaudio': coreaudio.found(),
    'dsound': dsound.found(),
    'jack': jack.found(),
    'oss': oss.found(),
    'pa': pulse.found(),
    'pipewire': pipewire.found(),
    'sdl': sdl.found(),
    'sndio': sndio.found(),
  }
  foreach k, v: audio_drivers_available
    config_host_data.set('CONFIG_AUDIO_' + k.to_upper(), v)
  endforeach

  # Default to native drivers first, OSS second, SDL third
  audio_drivers_priority = \
    [ 'pa', 'coreaudio', 'dsound', 'sndio', 'oss' ] + \
    (host_os == 'linux' ? [] : [ 'sdl' ])
  audio_drivers_default = []
  foreach k: audio_drivers_priority
    if audio_drivers_available[k]
      audio_drivers_default += k
    endif
  endforeach

  foreach k: get_option('audio_drv_list')
    if k == 'default'
      audio_drivers_selected += audio_drivers_default
    elif not audio_drivers_available[k]
      error('Audio driver "@0@" not available.'.format(k))
    else
      audio_drivers_selected += k
    endif
  endforeach
endif
config_host_data.set('CONFIG_AUDIO_DRIVERS',
                     '"' + '", "'.join(audio_drivers_selected) + '", ')

have_host_block_device = (host_os != 'darwin' or
    cc.has_header('IOKit/storage/IOMedia.h'))

dbus_display = get_option('dbus_display') \
  .require(gio.version().version_compare('>=2.64'),
           error_message: '-display dbus requires glib>=2.64') \
  .require(gdbus_codegen.found(),
           error_message: gdbus_codegen_error.format('-display dbus')) \
  .allowed()

have_virtfs = get_option('virtfs') \
    .require(host_os == 'linux' or host_os == 'darwin',
             error_message: 'virtio-9p (virtfs) requires Linux or macOS') \
    .require(host_os == 'linux' or cc.has_function('pthread_fchdir_np'),
             error_message: 'virtio-9p (virtfs) on macOS requires the presence of pthread_fchdir_np') \
    .require(host_os == 'darwin' or libattr.found(),
             error_message: 'virtio-9p (virtfs) on Linux requires libattr-devel') \
    .disable_auto_if(not have_tools and not have_system) \
    .allowed()

have_virtfs_proxy_helper = get_option('virtfs_proxy_helper') \
    .require(host_os != 'darwin', error_message: 'the virtfs proxy helper is incompatible with macOS') \
    .require(have_virtfs, error_message: 'the virtfs proxy helper requires that virtfs is enabled') \
    .disable_auto_if(not have_tools) \
    .require(libcap_ng.found(), error_message: 'the virtfs proxy helper requires libcap-ng') \
    .allowed()

if get_option('block_drv_ro_whitelist') == ''
  config_host_data.set('CONFIG_BDRV_RO_WHITELIST', '')
else
  config_host_data.set('CONFIG_BDRV_RO_WHITELIST',
        '"' + get_option('block_drv_ro_whitelist').replace(',', '", "') + '", ')
endif
if get_option('block_drv_rw_whitelist') == ''
  config_host_data.set('CONFIG_BDRV_RW_WHITELIST', '')
else
  config_host_data.set('CONFIG_BDRV_RW_WHITELIST',
        '"' + get_option('block_drv_rw_whitelist').replace(',', '", "') + '", ')
endif

foreach k : get_option('trace_backends')
  config_host_data.set('CONFIG_TRACE_' + k.to_upper(), true)
endforeach
config_host_data.set_quoted('CONFIG_TRACE_FILE', get_option('trace_file'))
config_host_data.set_quoted('CONFIG_TLS_PRIORITY', get_option('tls_priority'))
if iasl.found()
  config_host_data.set_quoted('CONFIG_IASL', iasl.full_path())
endif
config_host_data.set_quoted('CONFIG_BINDIR', get_option('prefix') / get_option('bindir'))
config_host_data.set_quoted('CONFIG_PREFIX', get_option('prefix'))
config_host_data.set_quoted('CONFIG_QEMU_CONFDIR', get_option('prefix') / qemu_confdir)
config_host_data.set_quoted('CONFIG_QEMU_DATADIR', get_option('prefix') / qemu_datadir)
config_host_data.set_quoted('CONFIG_QEMU_DESKTOPDIR', get_option('prefix') / qemu_desktopdir)

qemu_firmwarepath = ''
foreach k : get_option('qemu_firmwarepath')
  qemu_firmwarepath += '"' + get_option('prefix') / k + '", '
endforeach
config_host_data.set('CONFIG_QEMU_FIRMWAREPATH', qemu_firmwarepath)

config_host_data.set_quoted('CONFIG_QEMU_HELPERDIR', get_option('prefix') / get_option('libexecdir'))
config_host_data.set_quoted('CONFIG_QEMU_ICONDIR', get_option('prefix') / qemu_icondir)
config_host_data.set_quoted('CONFIG_QEMU_LOCALEDIR', get_option('prefix') / get_option('localedir'))
config_host_data.set_quoted('CONFIG_QEMU_LOCALSTATEDIR', get_option('prefix') / get_option('localstatedir'))
config_host_data.set_quoted('CONFIG_QEMU_MODDIR', get_option('prefix') / qemu_moddir)
config_host_data.set_quoted('CONFIG_SYSCONFDIR', get_option('prefix') / get_option('sysconfdir'))

if enable_modules
  config_host_data.set('CONFIG_STAMP', run_command(
      meson.current_source_dir() / 'scripts/qemu-stamp.py',
      meson.project_version(), get_option('pkgversion'), '--',
      meson.current_source_dir() / 'configure',
      capture: true, check: true).stdout().strip())
endif

have_slirp_smbd = get_option('slirp_smbd') \
  .require(host_os != 'windows', error_message: 'Host smbd not supported on this platform.') \
  .allowed()
if have_slirp_smbd
  smbd_path = get_option('smbd')
  if smbd_path == ''
    smbd_path = (host_os == 'sunos' ? '/usr/sfw/sbin/smbd' : '/usr/sbin/smbd')
  endif
  config_host_data.set_quoted('CONFIG_SMBD_COMMAND', smbd_path)
endif

config_host_data.set('HOST_' + host_arch.to_upper(), 1)

kvm_targets_c = '""'
if get_option('kvm').allowed() and host_os == 'linux'
  kvm_targets_c = '"' + '" ,"'.join(kvm_targets) + '"'
endif
config_host_data.set('CONFIG_KVM_TARGETS', kvm_targets_c)

if get_option('module_upgrades') and not enable_modules
  error('Cannot enable module-upgrades as modules are not enabled')
endif
config_host_data.set('CONFIG_MODULE_UPGRADES', get_option('module_upgrades'))

config_host_data.set('CONFIG_ATTR', libattr.found())
config_host_data.set('CONFIG_BDRV_WHITELIST_TOOLS', get_option('block_drv_whitelist_in_tools'))
config_host_data.set('CONFIG_BRLAPI', brlapi.found())
config_host_data.set('CONFIG_BSD', host_os in bsd_oses)
config_host_data.set('CONFIG_CAPSTONE', capstone.found())
config_host_data.set('CONFIG_COCOA', cocoa.found())
config_host_data.set('CONFIG_DARWIN', host_os == 'darwin')
config_host_data.set('CONFIG_FUZZ', get_option('fuzzing'))
config_host_data.set('CONFIG_GCOV', get_option('b_coverage'))
config_host_data.set('CONFIG_LIBUDEV', libudev.found())
config_host_data.set('CONFIG_LINUX', host_os == 'linux')
config_host_data.set('CONFIG_POSIX', host_os != 'windows')
config_host_data.set('CONFIG_WIN32', host_os == 'windows')
config_host_data.set('CONFIG_LZO', lzo.found())
config_host_data.set('CONFIG_MPATH', mpathpersist.found())
config_host_data.set('CONFIG_BLKIO', blkio.found())
if blkio.found()
  config_host_data.set('CONFIG_BLKIO_VHOST_VDPA_FD',
                       blkio.version().version_compare('>=1.3.0'))
endif
config_host_data.set('CONFIG_CURL', curl.found())
config_host_data.set('CONFIG_CURSES', curses.found())
config_host_data.set('CONFIG_GBM', gbm.found())
config_host_data.set('CONFIG_GIO', gio.found())
config_host_data.set('CONFIG_GLUSTERFS', glusterfs.found())
if glusterfs.found()
  config_host_data.set('CONFIG_GLUSTERFS_XLATOR_OPT', glusterfs.version().version_compare('>=4'))
  config_host_data.set('CONFIG_GLUSTERFS_DISCARD', glusterfs.version().version_compare('>=5'))
  config_host_data.set('CONFIG_GLUSTERFS_FALLOCATE', glusterfs.version().version_compare('>=6'))
  config_host_data.set('CONFIG_GLUSTERFS_ZEROFILL', glusterfs.version().version_compare('>=6'))
  config_host_data.set('CONFIG_GLUSTERFS_FTRUNCATE_HAS_STAT', glusterfs_ftruncate_has_stat)
  config_host_data.set('CONFIG_GLUSTERFS_IOCB_HAS_STAT', glusterfs_iocb_has_stat)
endif
config_host_data.set('CONFIG_GTK', gtk.found())
config_host_data.set('CONFIG_VTE', vte.found())
config_host_data.set('CONFIG_GTK_CLIPBOARD', have_gtk_clipboard)
config_host_data.set('CONFIG_HEXAGON_IDEF_PARSER', get_option('hexagon_idef_parser'))
config_host_data.set('CONFIG_LIBATTR', have_old_libattr)
config_host_data.set('CONFIG_LIBCAP_NG', libcap_ng.found())
config_host_data.set('CONFIG_EBPF', libbpf.found())
config_host_data.set('CONFIG_AF_XDP', libxdp.found())
config_host_data.set('CONFIG_LIBDAXCTL', libdaxctl.found())
config_host_data.set('CONFIG_LIBISCSI', libiscsi.found())
config_host_data.set('CONFIG_LIBNFS', libnfs.found())
config_host_data.set('CONFIG_LIBSSH', libssh.found())
config_host_data.set('CONFIG_LINUX_AIO', libaio.found())
config_host_data.set('CONFIG_LINUX_IO_URING', linux_io_uring.found())
config_host_data.set('CONFIG_LIBPMEM', libpmem.found())
config_host_data.set('CONFIG_MODULES', enable_modules)
config_host_data.set('CONFIG_NUMA', numa.found())
if numa.found()
  config_host_data.set('HAVE_NUMA_HAS_PREFERRED_MANY',
                       cc.has_function('numa_has_preferred_many',
                                       dependencies: numa))
endif
config_host_data.set('CONFIG_OPENGL', opengl.found())
config_host_data.set('CONFIG_PLUGIN', get_option('plugins'))
config_host_data.set('CONFIG_RBD', rbd.found())
config_host_data.set('CONFIG_RDMA', rdma.found())
config_host_data.set('CONFIG_RELOCATABLE', get_option('relocatable'))
config_host_data.set('CONFIG_SAFESTACK', get_option('safe_stack'))
config_host_data.set('CONFIG_SDL', sdl.found())
config_host_data.set('CONFIG_SDL_IMAGE', sdl_image.found())
config_host_data.set('CONFIG_SECCOMP', seccomp.found())
if seccomp.found()
  config_host_data.set('CONFIG_SECCOMP_SYSRAWRC', seccomp_has_sysrawrc)
endif
config_host_data.set('CONFIG_PIXMAN', pixman.found())
config_host_data.set('CONFIG_SLIRP', slirp.found())
config_host_data.set('CONFIG_SNAPPY', snappy.found())
config_host_data.set('CONFIG_SOLARIS', host_os == 'sunos')
if get_option('tcg').allowed()
  config_host_data.set('CONFIG_TCG', 1)
  config_host_data.set('CONFIG_TCG_INTERPRETER', tcg_arch == 'tci')
endif
config_host_data.set('CONFIG_TPM', have_tpm)
config_host_data.set('CONFIG_TSAN', get_option('tsan'))
config_host_data.set('CONFIG_USB_LIBUSB', libusb.found())
config_host_data.set('CONFIG_VDE', vde.found())
config_host_data.set('CONFIG_VHOST', have_vhost)
config_host_data.set('CONFIG_VHOST_NET', have_vhost_net)
config_host_data.set('CONFIG_VHOST_NET_USER', have_vhost_net_user)
config_host_data.set('CONFIG_VHOST_NET_VDPA', have_vhost_net_vdpa)
config_host_data.set('CONFIG_VHOST_KERNEL', have_vhost_kernel)
config_host_data.set('CONFIG_VHOST_USER', have_vhost_user)
config_host_data.set('CONFIG_VHOST_CRYPTO', have_vhost_user_crypto)
config_host_data.set('CONFIG_VHOST_VDPA', have_vhost_vdpa)
config_host_data.set('CONFIG_VMNET', vmnet.found())
config_host_data.set('CONFIG_VHOST_USER_BLK_SERVER', have_vhost_user_blk_server)
config_host_data.set('CONFIG_VDUSE_BLK_EXPORT', have_vduse_blk_export)
config_host_data.set('CONFIG_PNG', png.found())
config_host_data.set('CONFIG_VNC', vnc.found())
config_host_data.set('CONFIG_VNC_JPEG', jpeg.found())
config_host_data.set('CONFIG_VNC_SASL', sasl.found())
if virgl.found()
  config_host_data.set('HAVE_VIRGL_D3D_INFO_EXT',
                       cc.has_member('struct virgl_renderer_resource_info_ext', 'd3d_tex2d',
                                     prefix: '#include <virglrenderer.h>',