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mutter/meson.build
Iain Lane d7d2612218 build: Compile with -ffloat-store on x86 (32 bit) 
GCC's manpage says that this flag does the following:

  Do not store floating-point variables in registers, and inhibit other
  options that might change whether a floating-point value is taken from
  a register or memory.

  This option prevents undesirable excess precision on machines such as
  the 68000 where the floating registers (of the 68881) keep more
  precision than a "double" is supposed to have.  Similarly for the x86
  architecture.  For most programs, the excess precision does only good,
  but a few programs rely on the precise definition of IEEE floating
  point.

We rely on this behaviour in our fork of clutter. When performing
floating point computations on x86, we are getting the wrong results
because of this architecture's use of the CPU's extended (x87, non-IEEE
confirming) precision by default. If we enable `-ffloat-store` here,
then we'll get the same results everywhere by storing into variables
instead of registers. This does not remove the need to be correct when
handling floats, but it does mean we don't need to be more correct than
the IEEE spec requires.

https://gitlab.gnome.org/GNOME/mutter/merge_requests/785
2019-09-20 10:06:36 +00:00

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project('mutter', 'c',
version: '3.34.0',
meson_version: '>= 0.50.0',
license: 'GPLv2+'
)
mutter_plugin_api_version = '3'
split_version = meson.project_version().split('.')
# Automatically increase API version each development cycle,
# starting with 0 in 3.23.x
api_version = (split_version[1].to_int() - 23) / 2
libmutter_api_version = '@0@'.format(api_version)
# generic version requirements
fribidi_req = '>= 1.0.0'
glib_req = '>= 2.61.1'
gi_req = '>= 0.9.5'
gtk3_req = '>= 3.19.8'
gdk_pixbuf_req = '>= 2.0'
uprof_req = '>= 0.3'
pango_req = '>= 1.2.0'
cairo_req = '>= 1.10.0'
pangocairo_req = '>= 1.20'
gsettings_desktop_schemas_req = '>= 3.33.0'
json_glib_req = '>= 0.12.0'
upower_glib_req = '>= 0.99.0'
xcomposite_req = '>= 0.4'
xkbcommon_req = '>= 0.4.3'
xfixes_req = '>= 3'
xi_req = '>= 1.7.4'
xrandr_req = '>= 1.5.0'
libstartup_notification_req = '>= 0.7'
libcanberra_req = '>= 0.26'
libwacom_req = '>= 0.13'
atk_req = '>= 2.5.3'
# optional version requirements
udev_req = '>= 228'
gudev_req = '>= 232'
# wayland version requirements
wayland_server_req = '>= 1.13.0'
wayland_protocols_req = '>= 1.18'
# native backend version requirements
libinput_req = '>= 1.4'
gbm_req = '>= 10.3'
# screen cast version requirements
libpipewire_req = '>= 0.2.5'
gnome = import('gnome')
pkg = import('pkgconfig')
i18n = import('i18n')
cc = meson.get_compiler('c')
prefix = get_option('prefix')
bindir = join_paths(prefix, get_option('bindir'))
datadir = join_paths(prefix, get_option('datadir'))
libdir = join_paths(prefix, get_option('libdir'))
libexecdir = join_paths(prefix, get_option('libexecdir'))
includedir = join_paths(prefix, get_option('includedir'))
sysconfdir = get_option('sysconfdir')
pkgname = '@0@-@1@'.format(meson.project_name(), libmutter_api_version)
pkgdatadir = join_paths(datadir, pkgname)
pkglibdir = join_paths(libdir, pkgname)
pkgincludedir = join_paths(includedir, pkgname)
pcdir = join_paths(libdir, 'pkgconfig')
gettext_package = meson.project_name()
localedir = join_paths(datadir, 'locale')
libmutter_name = 'mutter-' + libmutter_api_version
mutter_installed_tests_datadir = join_paths(
datadir, 'installed-tests', libmutter_name)
mutter_installed_tests_libexecdir = join_paths(
libexecdir, 'installed-tests', libmutter_name)
m_dep = cc.find_library('m', required: true)
x11_dep = dependency('x11')
gtk3_dep = dependency('gtk+-3.0', version: gtk3_req)
gdk_pixbuf_dep = dependency('gdk-pixbuf-2.0')
pango_dep = dependency('pango', version: pango_req)
cairo_dep = dependency('cairo', version: cairo_req)
cairo_gobject_dep = dependency('cairo-gobject', version: cairo_req)
pangocairo_dep = dependency('pangocairo', version: pangocairo_req)
fribidi_dep = dependency('fribidi', version: fribidi_req)
gsettings_desktop_schemas_dep = dependency('gsettings-desktop-schemas',
version: gsettings_desktop_schemas_req)
glib_dep = dependency('glib-2.0', version: glib_req)
gio_dep = dependency('gio-unix-2.0', version: glib_req)
gio_unix_dep = dependency('gio-unix-2.0', version: glib_req)
gobject_dep = dependency('gobject-2.0', version: glib_req)
gthread_dep = dependency('gobject-2.0', version: glib_req)
gmodule_no_export_dep = dependency('gmodule-no-export-2.0', version: glib_req)
gnome_settings_daemon_dep = dependency('gnome-settings-daemon')
json_glib_dep = dependency('json-glib-1.0', version: json_glib_req)
gnome_desktop_dep = dependency('gnome-desktop-3.0')
xcomposite_dep = dependency('xcomposite', version: xcomposite_req)
xcursor_dep = dependency('xcursor')
xdamage_dep = dependency('xdamage')
xext_dep = dependency('xext')
xfixes_dep = dependency('xfixes', version: xfixes_req)
xi_dep = dependency('xi', version: xi_req)
xtst_dep = dependency('xtst')
xkbfile_dep = dependency('xkbfile')
xkeyboard_config_dep = dependency('xkeyboard-config')
xkbcommon_dep = dependency('xkbcommon', version: xkbcommon_req)
xkbcommon_x11_dep = dependency('xkbcommon-x11')
xrender_dep = dependency('xrender')
x11_xcb_dep = dependency('x11-xcb')
xrandr_dep = dependency('xrandr', version: xrandr_req)
xcb_randr_dep = dependency('xcb-randr')
xcb_res_dep = dependency('xcb-res')
xinerama_dep = dependency('xinerama')
xau_dep = dependency('xau')
ice_dep = dependency('ice')
atk_dep = dependency('atk', version: atk_req)
libcanberra_dep = dependency('libcanberra', version: libcanberra_req)
# For now always require X11 support
have_x11 = true
have_gl = get_option('opengl')
if have_gl
gl_dep = dependency('gl')
gl_libname = get_option('opengl_libname')
endif
have_egl = get_option('egl')
if have_egl
egl_dep = dependency('egl')
endif
have_glx = get_option('glx')
if have_glx
if not have_gl
error('GLX support requires OpenGL to be enabled')
endif
endif
have_egl_xlib = have_egl and have_x11
have_gles2 = get_option('gles2')
if have_gles2
gles2_dep = dependency('glesv2')
gles2_libname = get_option('gles2_libname')
if not have_egl
error('GLESv2 support requires EGL to be enabled')
endif
endif
have_wayland = get_option('wayland')
if have_wayland
wayland_server_dep = dependency('wayland-server', version: wayland_server_req)
wayland_protocols_dep = dependency('wayland-protocols',
version: wayland_protocols_req)
wayland_egl_dep = dependency('wayland-egl')
if not have_egl
error('Wayland support requires EGL to be enabled')
endif
endif
have_libgudev = get_option('udev')
if have_libgudev
libudev_dep = dependency('libudev', version: udev_req)
gudev_dep = dependency('gudev-1.0', version: gudev_req)
endif
have_native_backend = get_option('native_backend')
if have_native_backend
libdrm_dep = dependency('libdrm')
libgbm_dep = dependency('gbm', version: gbm_req)
libinput_dep = dependency('libinput', version: libinput_req)
libsystemd_dep = dependency('libsystemd', required: false)
if libsystemd_dep.found()
logind_provider_dep = libsystemd_dep
else
logind_provider_dep = dependency('libelogind')
endif
if not have_egl
error('The native backend requires EGL to be enabled')
endif
if not have_gles2
error('The native backend requires GLESv2 to be enabled')
endif
if not have_libgudev
error('The native backend requires udev to be enabled')
endif
endif
have_egl_device = get_option('egl_device')
have_wayland_eglstream = get_option('wayland_eglstream')
if have_wayland_eglstream
wayland_eglstream_protocols_dep = dependency('wayland-eglstream-protocols')
dl_dep = cc.find_library('dl', required: true)
if not have_wayland
error('Wayland EGLStream support requires Wayland to be enabled')
endif
endif
have_sm = get_option('sm')
if have_sm
sm_dep = dependency('sm')
endif
have_libwacom = get_option('libwacom')
if have_libwacom
libwacom_dep = dependency('libwacom', version: libwacom_req)
endif
have_pango_ft2 = get_option('pango_ft2')
if have_pango_ft2
pangoft2_dep = dependency('pangoft2')
endif
have_startup_notification = get_option('startup_notification')
if have_startup_notification
libstartup_notification_dep = dependency('libstartup-notification-1.0',
version: libstartup_notification_req)
endif
have_remote_desktop = get_option('remote_desktop')
if have_remote_desktop
libpipewire_dep = dependency('libpipewire-0.2', version: libpipewire_req)
endif
have_introspection = get_option('introspection')
if have_introspection
gobject_introspection_dep = dependency('gobject-introspection-1.0')
introspection_args = [
'--quiet',
'-U_GNU_SOURCE',
]
endif
have_tests = get_option('tests')
have_core_tests = false
have_cogl_tests = false
have_clutter_tests = false
have_installed_tests = false
if have_tests
have_core_tests = get_option('core_tests')
if have_core_tests
if not have_wayland
error('Tests require Wayland to be enabled')
endif
endif
have_cogl_tests = get_option('cogl_tests')
have_clutter_tests = get_option('clutter_tests')
have_installed_tests = get_option('installed_tests')
endif
have_profiler = get_option('profiler')
if have_profiler
sysprof_dep = dependency('sysprof-capture-3')
endif
required_functions = [
'ffs',
'clz',
'memmem',
]
foreach function : required_functions
if not cc.has_function(function)
error('Required function ' + function + ' missing')
endif
endforeach
if host_machine.cpu_family() == 'x86'
add_project_arguments('-ffloat-store', language: 'c')
endif
add_project_arguments('-D_GNU_SOURCE', language: 'c')
buildtype = get_option('buildtype')
if buildtype != 'plain'
all_warnings = [
'-fno-strict-aliasing',
'-Wpointer-arith',
'-Wmissing-declarations',
'-Wimplicit-function-declaration',
'-Wformat=2',
'-Wformat-nonliteral',
'-Wformat-security',
'-Wstrict-prototypes',
'-Wmissing-prototypes',
'-Wnested-externs',
'-Wold-style-definition',
'-Wundef',
'-Wunused',
'-Wcast-align',
'-Wmissing-noreturn',
'-Wmissing-format-attribute',
'-Wmissing-include-dirs',
'-Wlogical-op',
'-Wignored-qualifiers',
'-Werror=redundant-decls',
'-Werror=implicit',
'-Werror=nonnull',
'-Werror=init-self',
'-Werror=main',
'-Werror=missing-braces',
'-Werror=sequence-point',
'-Werror=return-type',
'-Werror=trigraphs',
'-Werror=array-bounds',
'-Werror=write-strings',
'-Werror=address',
'-Werror=int-to-pointer-cast',
'-Werror=pointer-to-int-cast',
'-Werror=empty-body',
'-Werror=write-strings',
]
supported_warnings = cc.get_supported_arguments(all_warnings)
add_project_arguments(supported_warnings, language: 'c')
endif
if get_option('debug')
debug_c_args = [
'-DG_ENABLE_DEBUG',
'-fno-omit-frame-pointer'
]
supported_debug_c_args = cc.get_supported_arguments(debug_c_args)
add_project_arguments(supported_debug_c_args, language: 'c')
endif
cc.compiles('void main (void) { __builtin_ffsl (0); __builtin_popcountl (0); }')
cdata = configuration_data()
cdata.set_quoted('GETTEXT_PACKAGE', gettext_package)
cdata.set_quoted('VERSION', meson.project_version())
cdata.set_quoted('PACKAGE_VERSION', meson.project_version())
cdata.set('HAVE_EGL', have_egl)
cdata.set('HAVE_WAYLAND', have_wayland)
cdata.set('HAVE_NATIVE_BACKEND', have_native_backend)
cdata.set('HAVE_REMOTE_DESKTOP', have_remote_desktop)
cdata.set('HAVE_EGL_DEVICE', have_egl_device)
cdata.set('HAVE_WAYLAND_EGLSTREAM', have_wayland_eglstream)
cdata.set('HAVE_LIBGUDEV', have_libgudev)
cdata.set('HAVE_LIBWACOM', have_libwacom)
cdata.set('HAVE_SM', have_sm)
cdata.set('HAVE_STARTUP_NOTIFICATION', have_startup_notification)
cdata.set('HAVE_INTROSPECTION', have_introspection)
cdata.set('HAVE_PROFILER', have_profiler)
xkb_base = xkeyboard_config_dep.get_pkgconfig_variable('xkb_base')
cdata.set_quoted('XKB_BASE', xkb_base)
if have_wayland
xwayland_path = get_option('xwayland_path')
if xwayland_path == ''
xwayland_path = find_program('Xwayland').path()
endif
cdata.set_quoted('XWAYLAND_PATH', xwayland_path)
# For Xwayland authority file generation.
if cc.has_header_symbol('sys/random.h', 'getrandom')
cdata.set('HAVE_SYS_RANDOM', 1)
elif cc.has_header_symbol('linux/random.h', 'getrandom')
cdata.set('HAVE_LINUX_RANDOM', 1)
else
error('Required function getrandom not found')
endif
endif
xwayland_grab_default_access_rules = get_option('xwayland_grab_default_access_rules')
cdata.set_quoted('XWAYLAND_GRAB_DEFAULT_ACCESS_RULES',
xwayland_grab_default_access_rules)
cdata.set_quoted('MUTTER_PLUGIN_DIR', join_paths(pkglibdir, 'plugins'))
cdata.set_quoted('MUTTER_LOCALEDIR', localedir)
cdata.set_quoted('MUTTER_LIBEXECDIR', libexecdir)
cdata.set_quoted('MUTTER_PKGDATADIR', pkgdatadir)
config_h = configure_file(
input: 'config.h.meson',
output: 'config.h',
configuration: cdata
)
top_includepath = include_directories('.')
subdir('cogl')
subdir('clutter')
subdir('data')
subdir('src')
subdir('po')
subdir('doc/man')
meson.add_install_script('meson/meson-postinstall.sh')
output = [
'',
'',
' Mutter ' + meson.project_version(),
' ===============',
'',
' Prefix....................... ' + prefix,
' libexecdir................... ' + libexecdir,
' pkgdatadir................... ' + pkgdatadir,
'',
' Rendering APIs:',
'',
' OpenGL................... ' + have_gl.to_string(),
' GLES2.................... ' + have_gles2.to_string(),
' EGL...................... ' + have_egl.to_string(),
' GLX...................... ' + have_glx.to_string(),
'',
' Options:',
'',
' Wayland.................. ' + have_wayland.to_string(),
' Wayland EGLStream........ ' + have_wayland_eglstream.to_string(),
' Native Backend........... ' + have_native_backend.to_string(),
' EGL Device............... ' + have_egl_device.to_string(),
' Remote desktop........... ' + have_remote_desktop.to_string(),
' gudev.................... ' + have_libgudev.to_string(),
' Wacom.................... ' + have_libwacom.to_string(),
' SM....................... ' + have_sm.to_string(),
' Startup notification..... ' + have_startup_notification.to_string(),
' Introspection............ ' + have_introspection.to_string(),
' Profiler................. ' + have_profiler.to_string(),
'',
' Tests:',
'',
' Enabled.................. ' + have_tests.to_string(),
' Core tests............... ' + have_core_tests.to_string(),
' Cogl tests............... ' + have_cogl_tests.to_string(),
' Clutter tests............ ' + have_clutter_tests.to_string(),
' Installed tests.......... ' + have_installed_tests.to_string(),
'',
' Now type \'ninja -C ' + meson.build_root() + '\' to build ' + meson.project_name(),
'',
'',
]
message('\n'.join(output))
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