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glib/meson.build
Philip Withnall f615eef4ba gmain: Use waitid() on pidfds rather than a global SIGCHLD handler 
When the system supports it (as all Linux kernels ≥ 5.3 should), it’s
preferable to use `pidfd_open()` and `waitid()` to be notified of
child processes exiting or being signalled, rather than installing a
default `SIGCHLD` handler.

A default `SIGCHLD` handler is global, and can never interact well with
other code (from the application or other libraries) which also wants to
install a `SIGCHLD` handler.

This use of `pidfd_open()` is racy (the PID may be reused between
`g_child_watch_source_new()` being called and `pidfd_open()` being
called), so it doesn’t improve behaviour there. For that, we’d need
continuous use of pidfds throughout GLib, from fork/spawn time until
here. See #1866 for that.

The use of `waitid()` to get the process exit status could be expanded
in future to also work for stopped or continued processes (as per #175)
by adding `WSTOPPED | WCONTINUED` into the flags. That’s a behaviour
change which is outside the strict scope of adding pidfd support,
though.

Signed-off-by: Philip Withnall <pwithnall@endlessos.org>

Helps: #1866
Fixes: #2216
2022-07-07 14:08:29 +01:00

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project('glib', 'c', 'cpp',
version : '2.73.1',
# NOTE: See the policy in docs/meson-version.md before changing the Meson dependency
meson_version : '>= 0.60.0',
default_options : [
'buildtype=debugoptimized',
'warning_level=3',
'c_std=gnu99'
]
)
cc = meson.get_compiler('c')
cxx = meson.get_compiler('cpp')
cc_can_run = meson.can_run_host_binaries()
if cc.get_argument_syntax() == 'msvc'
# Ignore several spurious warnings for things glib does very commonly
# (also for clang-cl)
add_project_arguments('/FImsvc_recommended_pragmas.h',language : 'c')
endif
if cc.get_id() == 'msvc'
# Set the input and exec encoding to utf-8, like is the default with GCC
add_project_arguments(cc.get_supported_arguments(['/utf-8']), language: 'c')
# Disable SAFESEH with MSVC for plugins and libs that use external deps that
# are built with MinGW
noseh_link_args = ['/SAFESEH:NO']
else
noseh_link_args = []
# -mms-bitfields vs -fnative-struct ?
endif
host_system = host_machine.system()
if host_system == 'darwin'
ios_test_code = '''#include <TargetConditionals.h>
#if ! TARGET_OS_IPHONE
#error "Not iOS/tvOS/watchOS/iPhoneSimulator"
#endif'''
if cc.compiles(ios_test_code, name : 'building for iOS')
host_system = 'ios'
endif
endif
glib_version = meson.project_version()
glib_api_version = '2.0'
version_arr = glib_version.split('.')
major_version = version_arr[0].to_int()
minor_version = version_arr[1].to_int()
micro_version = version_arr[2].to_int()
interface_age = minor_version.is_odd() ? 0 : micro_version
binary_age = 100 * minor_version + micro_version
soversion = 0
# Maintain compatibility with previous libtool versioning
# current = minor * 100 + micro
current = binary_age - interface_age
library_version = '@0@.@1@.@2@'.format(soversion, current, interface_age)
darwin_versions = [current + 1, '@0@.@1@'.format(current + 1, interface_age)]
configinc = include_directories('.')
glibinc = include_directories('glib')
gobjectinc = include_directories('gobject')
gmoduleinc = include_directories('gmodule')
gioinc = include_directories('gio')
glib_prefix = get_option('prefix')
glib_bindir = join_paths(glib_prefix, get_option('bindir'))
glib_libdir = join_paths(glib_prefix, get_option('libdir'))
glib_libexecdir = join_paths(glib_prefix, get_option('libexecdir'))
glib_datadir = join_paths(glib_prefix, get_option('datadir'))
glib_pkgdatadir = join_paths(glib_datadir, 'glib-2.0')
glib_includedir = join_paths(glib_prefix, get_option('includedir'))
if get_option('gio_module_dir') != ''
glib_giomodulesdir = join_paths(glib_prefix, get_option('gio_module_dir'))
else
glib_giomodulesdir = join_paths(glib_libdir, 'gio', 'modules')
endif
glib_pkgconfigreldir = join_paths(glib_libdir, 'pkgconfig')
if get_option('charsetalias_dir') != ''
glib_charsetaliasdir = join_paths(glib_prefix, get_option('charsetalias_dir'))
else
glib_charsetaliasdir = glib_libdir
endif
glib_localstatedir = get_option('localstatedir')
if not glib_localstatedir.startswith('/')
# See https://mesonbuild.com/Builtin-options.html#directories
glib_localstatedir = join_paths(glib_prefix, glib_localstatedir)
endif
installed_tests_metadir = join_paths(glib_datadir, 'installed-tests', meson.project_name())
installed_tests_execdir = join_paths(glib_libexecdir, 'installed-tests', meson.project_name())
installed_tests_enabled = get_option('installed_tests')
installed_tests_template = files('tests/template.test.in')
installed_tests_template_tap = files('tests/template-tap.test.in')
# Don’t build the tests unless we can run them (either natively, in an exe wrapper, or by installing them for later use)
build_tests = get_option('tests') and (meson.can_run_host_binaries() or installed_tests_enabled)
# Allow the tests to be easily run under valgrind using --setup=valgrind
valgrind = find_program('valgrind', required: false)
if valgrind.found()
suppression_file = files('tools' / 'glib.supp')
add_test_setup('valgrind',
exclude_suites: [ 'no-valgrind' ],
exe_wrapper: [
valgrind,
'--tool=memcheck',
'--error-exitcode=1',
'--track-origins=yes',
'--leak-check=full',
'--leak-resolution=high',
'--num-callers=50',
'--show-leak-kinds=definite,possible',
'--show-error-list=yes',
'--suppressions=@0@'.format(meson.project_source_root() /
'@0@'.format(suppression_file[0])),
],
timeout_multiplier: 10,
)
endif
add_project_arguments('-D_GNU_SOURCE', language: 'c')
if host_system == 'qnx'
add_project_arguments('-D_QNX_SOURCE', language: 'c')
endif
# Disable strict aliasing;
# see https://bugzilla.gnome.org/show_bug.cgi?id=791622
if cc.has_argument('-fno-strict-aliasing')
add_project_arguments('-fno-strict-aliasing', language: 'c')
endif
# dummy/empty dependency() object to declare fallbacks and simpler dependencies
not_found = dependency('', required: false)
########################
# Configuration begins #
########################
glib_conf = configuration_data()
glibconfig_conf = configuration_data()
# accumulated list of defines as we check for them, so we can easily
# use them later in test programs (autoconf does this automatically)
glib_conf_prefix = ''
glib_conf.set('GLIB_MAJOR_VERSION', major_version)
glib_conf.set('GLIB_MINOR_VERSION', minor_version)
glib_conf.set('GLIB_MICRO_VERSION', micro_version)
glib_conf.set('GLIB_INTERFACE_AGE', interface_age)
glib_conf.set('GLIB_BINARY_AGE', binary_age)
glib_conf.set_quoted('GETTEXT_PACKAGE', 'glib20')
glib_conf.set_quoted('PACKAGE_BUGREPORT', 'https://gitlab.gnome.org/GNOME/glib/issues/new')
glib_conf.set_quoted('PACKAGE_NAME', 'glib')
glib_conf.set_quoted('PACKAGE_STRING', 'glib @0@'.format(meson.project_version()))
glib_conf.set_quoted('PACKAGE_TARNAME', 'glib')
glib_conf.set_quoted('PACKAGE_URL', '')
glib_conf.set_quoted('PACKAGE_VERSION', meson.project_version())
glib_conf.set('ENABLE_NLS', 1)
# used by the .rc.in files
glibconfig_conf.set('LT_CURRENT_MINUS_AGE', soversion)
glib_conf.set('_GNU_SOURCE', 1)
if host_system in ['windows', 'darwin']
# Poll doesn't work on devices on Windows, and macOS's poll() implementation is known to be broken
glib_conf.set('BROKEN_POLL', true)
endif
if host_system == 'windows' and cc.get_id() != 'msvc' and cc.get_id() != 'clang-cl'
# FIXME: Ideally we shouldn't depend on this on Windows and should use
# 64 bit capable Windows API that also works with MSVC.
# The autotools build did set this for mingw and while meson sets it
# for gcc/clang by default, it doesn't do so on Windows.
glib_conf.set('_FILE_OFFSET_BITS', 64)
endif
# Check for GNU visibility attributes
g_have_gnuc_visibility = cc.compiles('''
void
__attribute__ ((visibility ("hidden")))
f_hidden (void)
{
}
void
__attribute__ ((visibility ("internal")))
f_internal (void)
{
}
void
__attribute__ ((visibility ("default")))
f_default (void)
{
}
int main (void)
{
f_hidden();
f_internal();
f_default();
return 0;
}
''',
# Not supported by MSVC, but MSVC also won't support visibility,
# so it's OK to pass -Werror explicitly. Replace with
# override_options : 'werror=true' once that is supported
args: ['-Werror'],
name : 'GNU C visibility attributes test')
if g_have_gnuc_visibility
glibconfig_conf.set('G_HAVE_GNUC_VISIBILITY', '1')
endif
# Detect and set symbol visibility
glib_hidden_visibility_args = []
if get_option('default_library') != 'static'
if host_system == 'windows' or host_system == 'cygwin'
if get_option('default_library') != 'shared'
error('On Windows default_library must be "shared" or "static" but not "both"')
endif
glib_conf.set('DLL_EXPORT', true)
if cc.get_id() == 'msvc' or cc.get_id() == 'clang-cl'
glib_conf.set('_GLIB_EXTERN', '__declspec(dllexport) extern')
elif cc.has_argument('-fvisibility=hidden')
glib_conf.set('_GLIB_EXTERN', '__attribute__((visibility("default"))) __declspec(dllexport) extern')
glib_hidden_visibility_args = ['-fvisibility=hidden']
endif
elif cc.has_argument('-fvisibility=hidden')
glib_conf.set('_GLIB_EXTERN', '__attribute__((visibility("default"))) extern')
glib_hidden_visibility_args = ['-fvisibility=hidden']
endif
endif
if get_option('default_library') == 'static'
glibconfig_conf.set('GLIB_STATIC_COMPILATION', '1')
glibconfig_conf.set('GOBJECT_STATIC_COMPILATION', '1')
glibconfig_conf.set('G_INTL_STATIC_COMPILATION', '1')
glibconfig_conf.set('FFI_STATIC_BUILD', '1')
endif
# Cygwin glib port maintainers made it clear
# (via the patches they apply) that they want no
# part of glib W32 code, therefore we do not define
# G_PLATFORM_WIN32 for host_system == 'cygwin'.
# This makes G_PLATFORM_WIN32 a synonym for
# G_OS_WIN32.
if host_system == 'windows'
glib_os = '''#define G_OS_WIN32
#define G_PLATFORM_WIN32'''
elif host_system == 'cygwin'
glib_os = '''#define G_OS_UNIX
#define G_WITH_CYGWIN'''
else
glib_os = '#define G_OS_UNIX'
endif
glibconfig_conf.set('glib_os', glib_os)
# We need to know the CRT being used to determine what .lib files we need on
# Visual Studio for dependencies that don't normally come with pkg-config files
vs_crt = 'release'
vs_crt_opt = get_option('b_vscrt')
if vs_crt_opt in ['mdd', 'mtd']
vs_crt = 'debug'
elif vs_crt_opt == 'from_buildtype'
if get_option('buildtype') == 'debug'
vs_crt = 'debug'
endif
endif
# Use debug/optimization flags to determine whether to enable debug or disable
# cast checks
glib_debug_cflags = []
glib_debug = get_option('glib_debug')
if glib_debug.enabled() or (glib_debug.auto() and get_option('debug'))
glib_debug_cflags += ['-DG_ENABLE_DEBUG']
message('Enabling various debug infrastructure')
elif get_option('optimization') in ['2', '3', 's']
glib_debug_cflags += ['-DG_DISABLE_CAST_CHECKS']
message('Disabling cast checks')
endif
if not get_option('glib_assert')
glib_debug_cflags += ['-DG_DISABLE_ASSERT']
message('Disabling GLib asserts')
endif
if not get_option('glib_checks')
glib_debug_cflags += ['-DG_DISABLE_CHECKS']
message('Disabling GLib checks')
endif
add_project_arguments(glib_debug_cflags, language: 'c')
# check for header files
headers = [
'alloca.h',
'afunix.h',
'crt_externs.h',
'dirent.h', # MSC does not come with this by default
'float.h',
'fstab.h',
'grp.h',
'inttypes.h',
'limits.h',
'locale.h',
'mach/mach_time.h',
'memory.h',
'mntent.h',
'poll.h',
'pwd.h',
'sched.h',
'spawn.h',
'stdatomic.h',
'stdint.h',
'stdlib.h',
'string.h',
'strings.h',
'sys/auxv.h',
'sys/event.h',
'sys/filio.h',
'sys/inotify.h',
'sys/mkdev.h',
'sys/mntctl.h',
'sys/mnttab.h',
'sys/mount.h',
'sys/param.h',
'sys/resource.h',
'sys/select.h',
'sys/statfs.h',
'sys/stat.h',
'sys/statvfs.h',
'sys/sysctl.h',
'sys/time.h', # MSC does not come with this by default
'sys/times.h',
'sys/types.h',
'sys/uio.h',
'sys/vfs.h',
'sys/vfstab.h',
'sys/vmount.h',
'sys/wait.h',
'termios.h',
'unistd.h',
'values.h',
'wchar.h',
'xlocale.h',
]
foreach h : headers
if cc.has_header(h)
define = 'HAVE_' + h.underscorify().to_upper()
glib_conf.set(define, 1)
glib_conf_prefix = glib_conf_prefix + '#define @0@ 1\n'.format(define)
endif
endforeach
# FreeBSD includes a malloc.h which always throws compilation error, so we have
# to use check_header() rather than has_header().
if cc.check_header('malloc.h')
glib_conf.set('HAVE_MALLOC_H', 1)
glib_conf_prefix = glib_conf_prefix + '#define HAVE_MALLOC_H 1\n'
endif
if cc.has_header('linux/netlink.h')
glib_conf.set('HAVE_NETLINK', 1)
endif
# Is statx() supported? Android systems don’t reliably support it as of August 2020.
statx_code = '''
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#include <sys/stat.h>
#include <fcntl.h>
int main (void)
{
struct statx stat_buf;
return statx (AT_FDCWD, "/", AT_SYMLINK_NOFOLLOW, STATX_BASIC_STATS | STATX_BTIME, &stat_buf);
}
'''
if host_system != 'android' and cc.compiles(statx_code, name : 'statx() test')
glib_conf.set('HAVE_STATX', 1)
endif
if glib_conf.has('HAVE_LOCALE_H')
if cc.has_header_symbol('locale.h', 'LC_MESSAGES')
glib_conf.set('HAVE_LC_MESSAGES', 1)
endif
endif
struct_stat_blkprefix = '''
#include <sys/types.h>
#include <sys/stat.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_SYS_STATFS_H
#include <sys/statfs.h>
#endif
#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#ifdef HAVE_SYS_MOUNT_H
#include <sys/mount.h>
#endif
'''
struct_members = [
[ 'stat', 'st_mtimensec' ],
[ 'stat', 'st_mtim.tv_nsec' ],
[ 'stat', 'st_atimensec' ],
[ 'stat', 'st_atim.tv_nsec' ],
[ 'stat', 'st_ctimensec' ],
[ 'stat', 'st_ctim.tv_nsec' ],
[ 'stat', 'st_birthtime' ],
[ 'stat', 'st_birthtimensec' ],
[ 'stat', 'st_birthtim' ],
[ 'stat', 'st_birthtim.tv_nsec' ],
[ 'stat', 'st_blksize', struct_stat_blkprefix ],
[ 'stat', 'st_blocks', struct_stat_blkprefix ],
[ 'statfs', 'f_fstypename', struct_stat_blkprefix ],
[ 'statfs', 'f_bavail', struct_stat_blkprefix ],
[ 'dirent', 'd_type', '''#include <sys/types.h>
#include <dirent.h>''' ],
[ 'statvfs', 'f_basetype', '#include <sys/statvfs.h>' ],
[ 'statvfs', 'f_fstypename', '#include <sys/statvfs.h>' ],
[ 'tm', 'tm_gmtoff', '#include <time.h>' ],
[ 'tm', '__tm_gmtoff', '#include <time.h>' ],
]
foreach m : struct_members
header_check_prefix = glib_conf_prefix
if m.length() == 3
header_check_prefix = header_check_prefix + m[2]
else
header_check_prefix = header_check_prefix + '#include <sys/stat.h>'
endif
if cc.has_member('struct ' + m[0], m[1], prefix : header_check_prefix)
define = 'HAVE_STRUCT_@0@_@1@'.format(m[0].to_upper(), m[1].underscorify().to_upper())
glib_conf.set(define, 1)
glib_conf_prefix = glib_conf_prefix + '#define @0@ 1\n'.format(define)
else
endif
endforeach
# Compiler flags
if cc.get_id() == 'gcc' or cc.get_id() == 'clang'
warning_common_args = [
'-Wduplicated-branches',
'-Wimplicit-fallthrough',
'-Wmisleading-indentation',
'-Wunused',
# Due to maintained deprecated code, we do not want to see unused parameters
'-Wno-unused-parameter',
# Due to pervasive use of things like GPOINTER_TO_UINT(), we do not support
# building with -Wbad-function-cast.
'-Wno-cast-function-type',
# Due to function casts through (void*) we cannot support -Wpedantic:
# https://wiki.gnome.org/Projects/GLib/CompilerRequirements#Function_pointer_conversions.
'-Wno-pedantic',
# A zero-length format string shouldn't be considered an issue.
'-Wno-format-zero-length',
# We explicitly require variadic macros
'-Wno-variadic-macros',
'-Werror=format=2',
'-Werror=init-self',
'-Werror=missing-include-dirs',
'-Werror=pointer-arith',
'-Werror=unused-result',
]
warning_c_args = warning_common_args + [
'-Wstrict-prototypes',
# Due to pervasive use of things like GPOINTER_TO_UINT(), we do not support
# building with -Wbad-function-cast.
'-Wno-bad-function-cast',
'-Werror=declaration-after-statement',
'-Werror=implicit-function-declaration',
'-Werror=missing-prototypes',
]
warning_cxx_args = warning_common_args
warning_objc_args = warning_c_args
warning_c_link_args = [
'-Wl,-z,nodelete',
]
if get_option('bsymbolic_functions')
warning_c_link_args += ['-Wl,-Bsymbolic-functions']
endif
elif cc.get_id() == 'msvc'
warning_c_args = [
# If a warning is completely useless and spammy, use '/wdXXXX' to suppress it
# If a warning is harmless but hard to fix, use '/woXXXX' so it's shown once
# NOTE: Only add warnings here if you are sure they're spurious
'/wo4057', # 'operator': 'identifier1' differs in indirection to slightly different base types from 'identifier2'
'/wd4068', # unknown pragma
'/wo4090', # 'operation': different 'modifier' qualifiers
'/wd4100', # 'identifier': unreferenced formal parameter
'/wd4116', # unnamed type definition in parentheses
'/wo4125', # decimal digit terminates octal escape sequence
'/wd4127', # conditional expression is constant
'/wd4146', # unary minus operator applied to unsigned type, result still unsigned
'/wd4152', # nonstandard extension, function/data pointer conversion in expression
'/wd4201', # nonstandard extension used: nameless struct/union
'/wd4232', # nonstandard extension used: 'identifier': address of dllimport 'dllimport' is not static, identity not guaranteed
'/wo4245', # 'conversion_type': conversion from 'type1' to 'type2', signed/unsigned mismatch
'/wo4267', # 'variable': conversion from 'size_t' to 'type', possible loss of data
'/wd4334', # 'shift_operator': result of 32-bit shift implicitly converted to 64 bits (was 64-bit shift intended?)
'/wo4389', # 'operator': signed/unsigned mismatch
'/wo4702', # unreachable code
'/wd4706', # assignment within conditional expression
]
warning_cxx_args = []
warning_objc_args = []
warning_c_link_args = []
else
warning_c_args = []
warning_cxx_args = []
warning_objc_args = []
warning_c_link_args = []
endif
add_project_arguments(cc.get_supported_arguments(warning_c_args), language: 'c')
add_project_arguments(cxx.get_supported_arguments(warning_cxx_args), language: 'cpp')
# FIXME: We cannot build some of the GResource tests with -z nodelete, which
# means we cannot use that flag in add_project_link_arguments(), and must add
# it to the relevant targets manually. We do the same with -Bsymbolic-functions
# because that is what the autotools build did.
# See https://github.com/mesonbuild/meson/pull/3520 for a way to eventually
# improve this.
glib_link_flags = cc.get_supported_link_arguments(warning_c_link_args)
# Windows SDK requirements and checks
if host_system == 'windows'
# Check whether we're building for UWP apps
code = '''
#include <windows.h>
#if !(WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP) && !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP))
#error "Not building for UWP"
#endif'''
if cc.compiles(code, name : 'building for UWP')
glib_conf.set('G_WINAPI_ONLY_APP', true)
# We require Windows 10+ on WinRT
glib_conf.set('_WIN32_WINNT', '0x0A00')
uwp_gio_deps = [cc.find_library('shcore'),
cc.find_library('runtimeobject')]
else
# We require Windows 7+ on Win32
glib_conf.set('_WIN32_WINNT', '0x0601')
uwp_gio_deps = []
endif
endif
functions = [
'close_range',
'endmntent',
'endservent',
'epoll_create',
'fallocate',
'fchmod',
'fchown',
'fdwalk',
'fsync',
'getauxval',
'getc_unlocked',
'getfsstat',
'getgrgid_r',
'getmntent_r',
'getpwuid_r',
'getresuid',
'getvfsstat',
'gmtime_r',
'hasmntopt',
'inotify_init1',
'issetugid',
'kevent',
'kqueue',
'lchmod',
'lchown',
'link',
'localtime_r',
'lstat',
'mbrtowc',
'memalign',
'mmap',
'newlocale',
'pipe2',
'poll',
'prlimit',
'readlink',
'recvmmsg',
'sendmmsg',
'setenv',
'setmntent',
'strerror_r',
'strnlen',
'strsignal',
'strtod_l',
'strtoll_l',
'strtoull_l',
'symlink',
'timegm',
'unsetenv',
'uselocale',
'utimes',
'utimensat',
'valloc',
'vasprintf',
'vsnprintf',
'wcrtomb',
'wcslen',
'wcsnlen',
'sysctlbyname',
]
# _NSGetEnviron is available on iOS too, but its usage gets apps rejected from
# the app store since it's considered 'private API'
if host_system == 'darwin'
functions += ['_NSGetEnviron']
endif
if glib_conf.has('HAVE_SYS_STATVFS_H')
functions += ['statvfs']
else
have_func_statvfs = false
endif
if glib_conf.has('HAVE_SYS_STATFS_H') or glib_conf.has('HAVE_SYS_MOUNT_H')
functions += ['statfs']
else
have_func_statfs = false
endif
if host_system == 'windows'
iphlpapi_dep = cc.find_library('iphlpapi')
iphlpapi_funcs = ['if_nametoindex', 'if_indextoname']
foreach ifunc : iphlpapi_funcs
iphl_prefix = '''#define _WIN32_WINNT @0@
#include <winsock2.h>
#include <iphlpapi.h>'''.format(glib_conf.get('_WIN32_WINNT'))
if cc.has_function(ifunc,
prefix : iphl_prefix,
dependencies : iphlpapi_dep)
idefine = 'HAVE_' + ifunc.underscorify().to_upper()
glib_conf.set(idefine, 1)
glib_conf_prefix = glib_conf_prefix + '#define @0@ 1\n'.format(idefine)
set_variable('have_func_' + ifunc, true)
else
set_variable('have_func_' + ifunc, false)
endif
endforeach
else
functions += ['if_indextoname', 'if_nametoindex']
endif
# AIX splice is something else
if host_system != 'aix'
functions += ['splice']
endif
foreach f : functions
if cc.has_function(f)
define = 'HAVE_' + f.underscorify().to_upper()
glib_conf.set(define, 1)
glib_conf_prefix = glib_conf_prefix + '#define @0@ 1\n'.format(define)
set_variable('have_func_' + f, true)
else
set_variable('have_func_' + f, false)
endif
endforeach
# Check that stpcpy() is usable; must use header.
# cc.has_function() in some cases (clang, gcc 10+) assumes that if the
# compiler provides a builtin of the same name that the function exists, while
# it's in fact not provided by any header or library. This is true for
# stpcpy() on Windows using clang and gcc as well as posix_memalign() using
# gcc on Windows. Skip these checks on Windows for now to avoid false
# positives. See https://github.com/mesonbuild/meson/pull/7116,
# https://github.com/mesonbuild/meson/issues/3672 and
# https://github.com/mesonbuild/meson/issues/5628.
# FIXME: Once meson no longer returns success for stpcpy() and
# posix_memalign() on Windows using GCC and clang we can remove this.
if host_system != 'windows' and cc.has_function('stpcpy', prefix : '#include <string.h>')
glib_conf.set('HAVE_STPCPY', 1)
endif
if cc.has_function('memalign', prefix: '#include <stdlib.h>\n#include <malloc.h>')
glib_conf.set('HAVE_MEMALIGN', 1)
endif
if cc.has_function('_aligned_malloc', prefix: '#include <malloc.h>')
glib_conf.set('HAVE__ALIGNED_MALLOC', 1)
endif
if host_system != 'windows' and cc.has_function('aligned_alloc', prefix: '#include <stdlib.h>')
glib_conf.set('HAVE_ALIGNED_ALLOC', 1)
endif
if host_system != 'windows' and cc.has_function('posix_memalign', prefix: '#include <stdlib.h>')
glib_conf.set('HAVE_POSIX_MEMALIGN', 1)
endif
# Check that posix_spawn() is usable; must use header
if cc.has_function('posix_spawn', prefix : '#include <spawn.h>')
glib_conf.set('HAVE_POSIX_SPAWN', 1)
endif
# Check whether strerror_r returns char *
if have_func_strerror_r
if cc.compiles('''#define _GNU_SOURCE
#include <string.h>
int func (void) {
char error_string[256];
char *ptr = strerror_r (-2, error_string, 256);
char c = *strerror_r (-2, error_string, 256);
return c != 0 && ptr != (void*) 0L;
}
''',
name : 'strerror_r() returns char *')
glib_conf.set('STRERROR_R_CHAR_P', 1,
description: 'Defined if strerror_r returns char *')
endif
endif
# Special-case these functions that have alternative names on Windows/MSVC
if cc.has_function('snprintf') or cc.has_header_symbol('stdio.h', 'snprintf')
glib_conf.set('HAVE_SNPRINTF', 1)
glib_conf_prefix = glib_conf_prefix + '#define HAVE_SNPRINTF 1\n'
elif cc.has_function('_snprintf') or cc.has_header_symbol('stdio.h', '_snprintf')
hack_define = '1\n#define snprintf _snprintf'
glib_conf.set('HAVE_SNPRINTF', hack_define)
glib_conf_prefix = glib_conf_prefix + '#define HAVE_SNPRINTF ' + hack_define
endif
if cc.has_function('strcasecmp', prefix: '#include <strings.h>')
glib_conf.set('HAVE_STRCASECMP', 1)
glib_conf_prefix = glib_conf_prefix + '#define HAVE_STRCASECMP 1\n'
elif cc.has_function('_stricmp')
hack_define = '1\n#define strcasecmp _stricmp'
glib_conf.set('HAVE_STRCASECMP', hack_define)
glib_conf_prefix = glib_conf_prefix + '#define HAVE_STRCASECMP ' + hack_define
endif
if cc.has_function('strncasecmp', prefix: '#include <strings.h>')
glib_conf.set('HAVE_STRNCASECMP', 1)
glib_conf_prefix = glib_conf_prefix + '#define HAVE_STRNCASECMP 1\n'
elif cc.has_function('_strnicmp')
hack_define = '1\n#define strncasecmp _strnicmp'
glib_conf.set('HAVE_STRNCASECMP', hack_define)
glib_conf_prefix = glib_conf_prefix + '#define HAVE_STRNCASECMP ' + hack_define
endif
if cc.has_header_symbol('sys/sysmacros.h', 'major')
glib_conf.set('MAJOR_IN_SYSMACROS', 1)
elif cc.has_header_symbol('sys/mkdev.h', 'major')
glib_conf.set('MAJOR_IN_MKDEV', 1)
elif cc.has_header_symbol('sys/types.h', 'major')
glib_conf.set('MAJOR_IN_TYPES', 1)
endif
if cc.has_header_symbol('dlfcn.h', 'RTLD_LAZY')
glib_conf.set('HAVE_RTLD_LAZY', 1)
endif
if cc.has_header_symbol('dlfcn.h', 'RTLD_NOW')
glib_conf.set('HAVE_RTLD_NOW', 1)
endif
if cc.has_header_symbol('dlfcn.h', 'RTLD_GLOBAL')
glib_conf.set('HAVE_RTLD_GLOBAL', 1)
endif
have_rtld_next = false
if cc.has_header_symbol('dlfcn.h', 'RTLD_NEXT', args: '-D_GNU_SOURCE')
have_rtld_next = true
glib_conf.set('HAVE_RTLD_NEXT', 1)
endif
# Check whether to use statfs or statvfs
# Some systems have both statfs and statvfs, pick the most "native" for these
if have_func_statfs and have_func_statvfs
# on solaris and irix, statfs doesn't even have the f_bavail field
if not glib_conf.has('HAVE_STRUCT_STATFS_F_BAVAIL')
have_func_statfs = false
else
# at least on linux, statfs is the actual syscall
have_func_statvfs = false
endif
endif
if have_func_statfs
glib_conf.set('USE_STATFS', 1)
stat_func_to_use = 'statfs'
elif have_func_statvfs
glib_conf.set('USE_STATVFS', 1)
stat_func_to_use = 'statvfs'
else
stat_func_to_use = 'neither'
endif
message('Checking whether to use statfs or statvfs .. ' + stat_func_to_use)
if host_system == 'linux'
if cc.has_function('mkostemp',
prefix: '''#define _GNU_SOURCE
#include <stdlib.h>''')
glib_conf.set('HAVE_MKOSTEMP', 1)
endif
endif
glib_have_os_x_9_or_later = false
glib_have_carbon = false
glib_have_cocoa = false
if host_system == 'darwin'
add_languages('objc', native: false, required: true)
objcc = meson.get_compiler('objc')
add_project_arguments(objcc.get_supported_arguments(warning_objc_args), language: 'objc')
# Mac OS X Carbon support
glib_have_carbon = objcc.compiles('''#include <Carbon/Carbon.h>
#include <CoreServices/CoreServices.h>''',
name : 'Mac OS X Carbon support')
if glib_have_carbon
glib_conf.set('HAVE_CARBON', true)
glib_have_os_x_9_or_later = objcc.compiles('''#include <AvailabilityMacros.h>
#if MAC_OS_X_VERSION_MIN_REQUIRED < 1090
#error Compiling for minimum OS X version before 10.9
#endif''',
name : 'OS X 9 or later')
endif
# Mac OS X Cocoa support
glib_have_cocoa = objcc.compiles('''#include <Cocoa/Cocoa.h>
#ifdef GNUSTEP_BASE_VERSION
#error "Detected GNUstep, not Cocoa"
#endif''',
name : 'Mac OS X Cocoa support')
if glib_have_cocoa
glib_conf.set('HAVE_COCOA', true)
endif
endif
if host_system == 'qnx'
glib_conf.set('HAVE_QNX', 1)
endif
# Check for futex(2)
if cc.links('''#include <linux/futex.h>
#include <sys/syscall.h>
#include <unistd.h>
int main (int argc, char ** argv) {
syscall (__NR_futex, NULL, FUTEX_WAKE, FUTEX_WAIT);
return 0;
}''', name : 'futex(2) system call')
glib_conf.set('HAVE_FUTEX', 1)
endif
# Check for eventfd(2)
if cc.links('''#include <sys/eventfd.h>
#include <unistd.h>
int main (int argc, char ** argv) {
eventfd (0, EFD_CLOEXEC);
return 0;
}''', name : 'eventfd(2) system call')
glib_conf.set('HAVE_EVENTFD', 1)
endif
# Check for pidfd_open(2)
if cc.links('''#include <sys/syscall.h>
#include <sys/wait.h>
#include <linux/wait.h>
#include <unistd.h>
int main (int argc, char ** argv) {
siginfo_t child_info = { 0, };
syscall (SYS_pidfd_open, 0, 0);
waitid (P_PIDFD, 0, &child_info, WEXITED | WNOHANG);
return 0;
}''', name : 'pidfd_open(2) system call')
glib_conf.set('HAVE_PIDFD', 1)
endif
# Check for __uint128_t (gcc) by checking for 128-bit division
uint128_t_src = '''int main() {
static __uint128_t v1 = 100;
static __uint128_t v2 = 10;
static __uint128_t u;
u = v1 / v2;
}'''
if cc.compiles(uint128_t_src, name : '__uint128_t available')
glib_conf.set('HAVE_UINT128_T', 1)
endif
clock_gettime_test_code = '''
#include <time.h>
struct timespec t;
int main (int argc, char ** argv) {
return clock_gettime(CLOCK_REALTIME, &t);
}'''
librt = []
if cc.links(clock_gettime_test_code, name : 'clock_gettime')
glib_conf.set('HAVE_CLOCK_GETTIME', 1)
elif cc.links(clock_gettime_test_code, args : '-lrt', name : 'clock_gettime in librt')
glib_conf.set('HAVE_CLOCK_GETTIME', 1)
librt = cc.find_library('rt')
endif
dlopen_dlsym_test_code = '''
#include <dlfcn.h>
int glib_underscore_test (void) { return 42; }
int main (int argc, char ** argv) {
void *f1 = (void*)0, *f2 = (void*)0, *handle;
handle = dlopen ((void*)0, 0);
if (handle) {
f1 = dlsym (handle, "glib_underscore_test");
f2 = dlsym (handle, "_glib_underscore_test");
}
return (!f2 || f1);
}'''
libdl_dep = []
if cc.links(dlopen_dlsym_test_code, name : 'dlopen() and dlsym() in system libraries')
have_dlopen_dlsym = true
elif cc.links(dlopen_dlsym_test_code, args : '-ldl', name : 'dlopen() and dlsym() in libdl')
have_dlopen_dlsym = true
libdl_dep = cc.find_library('dl')
else
have_dlopen_dlsym = false
endif
# if statfs() takes 2 arguments (Posix) or 4 (Solaris)
if have_func_statfs
if cc.compiles(glib_conf_prefix + '''
#include <unistd.h>
#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#ifdef HAVE_SYS_VFS_H
#include <sys/vfs.h>
#endif
#ifdef HAVE_SYS_MOUNT_H
#include <sys/mount.h>
#endif
#ifdef HAVE_SYS_STATFS_H
#include <sys/statfs.h>
#endif
void some_func (void) {
struct statfs st;
statfs("/", &st);
}''', name : 'number of arguments to statfs() (n=2)')
glib_conf.set('STATFS_ARGS', 2)
elif cc.compiles(glib_conf_prefix + '''
#include <unistd.h>
#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#ifdef HAVE_SYS_VFS_H
#include <sys/vfs.h>
#endif
#ifdef HAVE_SYS_MOUNT_H
#include <sys/mount.h>
#endif
#ifdef HAVE_SYS_STATFS_H
#include <sys/statfs.h>
#endif
void some_func (void) {
struct statfs st;
statfs("/", &st, sizeof (st), 0);
}''', name : 'number of arguments to statfs() (n=4)')
glib_conf.set('STATFS_ARGS', 4)
else
error('Unable to determine number of arguments to statfs()')
endif
endif
# open takes O_DIRECTORY as an option
#AC_MSG_CHECKING([])
if cc.compiles('''#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
void some_func (void) {
open(0, O_DIRECTORY, 0);
}''', name : 'open() option O_DIRECTORY')
glib_conf.set('HAVE_OPEN_O_DIRECTORY', 1)
endif
# fcntl takes F_FULLFSYNC as an option
# See https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/fsync.2.html
if cc.compiles('''#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
void some_func (void) {
fcntl(0, F_FULLFSYNC, 0);
}''', name : 'fcntl() option F_FULLFSYNC')
glib_conf.set('HAVE_FCNTL_F_FULLFSYNC', 1)
endif
# Check whether there is a vsnprintf() function with C99 semantics installed.
# (similar tests to AC_FUNC_VSNPRINTF_C99)
# Check whether there is a snprintf() function with C99 semantics installed.
# (similar tests to AC_FUNC_SNPRINTF_C99)
# Check whether there is a printf() function with Unix98 semantics installed.
# (similar tests to AC_FUNC_PRINTF_UNIX98)
have_good_vsnprintf = false
have_good_snprintf = false
have_good_printf = false
if host_system == 'windows' and (cc.get_id() == 'msvc' or cc.get_id() == 'clang-cl')
# Unfortunately the Visual Studio 2015+ implementations of C99-style
# snprintf and vsnprintf don't seem to be quite good enough.
# (Sorry, I don't know exactly what is the problem,
# but it is related to floating point formatting and decimal point vs. comma.)
# The simple tests in AC_FUNC_VSNPRINTF_C99 and AC_FUNC_SNPRINTF_C99 aren't
# rigorous enough to notice, though.
glib_conf.set('HAVE_C99_SNPRINTF', false)
glib_conf.set('HAVE_C99_VSNPRINTF', false)
glib_conf.set('HAVE_UNIX98_PRINTF', false)
elif not cc_can_run and host_system in ['ios', 'darwin']
# All these are true when compiling natively on macOS, so we should use good
# defaults when building for iOS and tvOS.
glib_conf.set('HAVE_C99_SNPRINTF', true)
glib_conf.set('HAVE_C99_VSNPRINTF', true)
glib_conf.set('HAVE_UNIX98_PRINTF', true)
have_good_vsnprintf = true
have_good_snprintf = true
have_good_printf = true
else
vsnprintf_c99_test_code = '''
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
int
doit(char * s, ...)
{
char buffer[32];
va_list args;
int r;
va_start(args, s);
r = vsnprintf(buffer, 5, s, args);
va_end(args);
if (r != 7)
exit(1);
/* AIX 5.1 and Solaris seems to have a half-baked vsnprintf()
implementation. The above will return 7 but if you replace
the size of the buffer with 0, it borks! */
va_start(args, s);
r = vsnprintf(buffer, 0, s, args);
va_end(args);
if (r != 7)
exit(1);
exit(0);
}
int
main(void)
{
doit("1234567");
exit(1);
}'''
if cc_can_run
rres = cc.run(vsnprintf_c99_test_code, name : 'C99 vsnprintf')
if rres.compiled() and rres.returncode() == 0
glib_conf.set('HAVE_C99_VSNPRINTF', 1)
have_good_vsnprintf = true
endif
else
have_good_vsnprintf = meson.get_external_property('have_c99_vsnprintf', false)
glib_conf.set('HAVE_C99_VSNPRINTF', have_good_vsnprintf)
endif
snprintf_c99_test_code = '''
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
int
doit()
{
char buffer[32];
va_list args;
int r;
r = snprintf(buffer, 5, "1234567");
if (r != 7)
exit(1);
r = snprintf(buffer, 0, "1234567");
if (r != 7)
exit(1);
r = snprintf(NULL, 0, "1234567");
if (r != 7)
exit(1);
exit(0);
}
int
main(void)
{
doit();
exit(1);
}'''
if cc_can_run
rres = cc.run(snprintf_c99_test_code, name : 'C99 snprintf')
if rres.compiled() and rres.returncode() == 0
glib_conf.set('HAVE_C99_SNPRINTF', 1)
have_good_snprintf = true
endif
else
have_good_snprintf = meson.get_external_property('have_c99_snprintf', false)
glib_conf.set('HAVE_C99_SNPRINTF', have_good_snprintf)
endif
printf_unix98_test_code = '''
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int
main (void)
{
char buffer[128];
sprintf (buffer, "%2\$d %3\$d %1\$d", 1, 2, 3);
if (strcmp ("2 3 1", buffer) == 0)
exit (0);
exit (1);
}'''
if cc_can_run
rres = cc.run(printf_unix98_test_code, name : 'Unix98 printf positional parameters')
if rres.compiled() and rres.returncode() == 0
glib_conf.set('HAVE_UNIX98_PRINTF', 1)
have_good_printf = true
endif
else
have_good_printf = meson.get_external_property('have_unix98_printf', false)
glib_conf.set('HAVE_UNIX98_PRINTF', have_good_printf)
endif
endif
if host_system == 'windows'
glib_conf.set_quoted('EXEEXT', '.exe')
else
glib_conf.set('EXEEXT', '')
endif
# Our printf is 'good' only if vsnpintf()/snprintf()/printf() supports C99 well enough
use_system_printf = have_good_vsnprintf and have_good_snprintf and have_good_printf
glib_conf.set('USE_SYSTEM_PRINTF', use_system_printf)
glibconfig_conf.set('GLIB_USING_SYSTEM_PRINTF', use_system_printf)
if not use_system_printf
# gnulib has vasprintf so override the previous check
glib_conf.set('HAVE_VASPRINTF', 1)
endif
# Check for nl_langinfo and CODESET
if cc.links('''#include <langinfo.h>
int main (int argc, char ** argv) {
char *codeset = nl_langinfo (CODESET);
return 0;
}''', name : 'nl_langinfo and CODESET')
glib_conf.set('HAVE_LANGINFO_CODESET', 1)
glib_conf.set('HAVE_CODESET', 1)
endif
# Check for nl_langinfo and LC_TIME parts that are needed in gdatetime.c
if cc.links('''#include <langinfo.h>
int main (int argc, char ** argv) {
char *str;
str = nl_langinfo (PM_STR);
str = nl_langinfo (D_T_FMT);
str = nl_langinfo (D_FMT);
str = nl_langinfo (T_FMT);
str = nl_langinfo (T_FMT_AMPM);
str = nl_langinfo (MON_1);
str = nl_langinfo (ABMON_12);
str = nl_langinfo (DAY_1);
str = nl_langinfo (ABDAY_7);
return 0;
}''', name : 'nl_langinfo (PM_STR)')
glib_conf.set('HAVE_LANGINFO_TIME', 1)
endif
if cc.links('''#include <langinfo.h>
int main (int argc, char ** argv) {
char *str;
str = nl_langinfo (_NL_CTYPE_OUTDIGIT0_MB);
str = nl_langinfo (_NL_CTYPE_OUTDIGIT1_MB);
str = nl_langinfo (_NL_CTYPE_OUTDIGIT2_MB);
str = nl_langinfo (_NL_CTYPE_OUTDIGIT3_MB);
str = nl_langinfo (_NL_CTYPE_OUTDIGIT4_MB);
str = nl_langinfo (_NL_CTYPE_OUTDIGIT5_MB);
str = nl_langinfo (_NL_CTYPE_OUTDIGIT6_MB);
str = nl_langinfo (_NL_CTYPE_OUTDIGIT7_MB);
str = nl_langinfo (_NL_CTYPE_OUTDIGIT8_MB);
str = nl_langinfo (_NL_CTYPE_OUTDIGIT9_MB);
return 0;
}''', name : 'nl_langinfo (_NL_CTYPE_OUTDIGITn_MB)')
glib_conf.set('HAVE_LANGINFO_OUTDIGIT', 1)
endif
# Check for nl_langinfo and alternative month names
if cc.links('''#ifndef _GNU_SOURCE
# define _GNU_SOURCE
#endif
#include <langinfo.h>
int main (int argc, char ** argv) {
char *str;
str = nl_langinfo (ALTMON_1);
str = nl_langinfo (ALTMON_2);
str = nl_langinfo (ALTMON_3);
str = nl_langinfo (ALTMON_4);
str = nl_langinfo (ALTMON_5);
str = nl_langinfo (ALTMON_6);
str = nl_langinfo (ALTMON_7);
str = nl_langinfo (ALTMON_8);
str = nl_langinfo (ALTMON_9);
str = nl_langinfo (ALTMON_10);
str = nl_langinfo (ALTMON_11);
str = nl_langinfo (ALTMON_12);
return 0;
}''', name : 'nl_langinfo (ALTMON_n)')
glib_conf.set('HAVE_LANGINFO_ALTMON', 1)
endif
# Check for nl_langinfo and abbreviated alternative month names
if cc.links('''#ifndef _GNU_SOURCE
# define _GNU_SOURCE
#endif
#include <langinfo.h>
int main (int argc, char ** argv) {
char *str;
str = nl_langinfo (_NL_ABALTMON_1);
str = nl_langinfo (_NL_ABALTMON_2);
str = nl_langinfo (_NL_ABALTMON_3);
str = nl_langinfo (_NL_ABALTMON_4);
str = nl_langinfo (_NL_ABALTMON_5);
str = nl_langinfo (_NL_ABALTMON_6);
str = nl_langinfo (_NL_ABALTMON_7);
str = nl_langinfo (_NL_ABALTMON_8);
str = nl_langinfo (_NL_ABALTMON_9);
str = nl_langinfo (_NL_ABALTMON_10);
str = nl_langinfo (_NL_ABALTMON_11);
str = nl_langinfo (_NL_ABALTMON_12);
return 0;
}''', name : 'nl_langinfo (_NL_ABALTMON_n)')
glib_conf.set('HAVE_LANGINFO_ABALTMON', 1)
endif
# Check for nl_langinfo and _NL_TIME_CODESET
if cc.links('''#include <langinfo.h>
int main (int argc, char ** argv) {
char *codeset = nl_langinfo (_NL_TIME_CODESET);
return 0;
}''', name : 'nl_langinfo and _NL_TIME_CODESET')
glib_conf.set('HAVE_LANGINFO_TIME_CODESET', 1)
endif
# Check if C compiler supports the 'signed' keyword
if not cc.compiles('''signed char x;''', name : 'signed')
glib_conf.set('signed', '/* NOOP */')
endif
# Check if the ptrdiff_t type exists
if cc.has_header_symbol('stddef.h', 'ptrdiff_t')
glib_conf.set('HAVE_PTRDIFF_T', 1)
endif
# Check for sig_atomic_t type
if cc.links('''#include <signal.h>
#include <sys/types.h>
sig_atomic_t val = 42;
int main (int argc, char ** argv) {
return val == 42 ? 0 : 1;
}''', name : 'sig_atomic_t')
glib_conf.set('HAVE_SIG_ATOMIC_T', 1)
endif
# Check if 'long long' works
# jm_AC_TYPE_LONG_LONG
if cc.compiles('''long long ll = 1LL;
int i = 63;
int some_func (void) {
long long llmax = (long long) -1;
return ll << i | ll >> i | llmax / ll | llmax % ll;
}''', name : 'long long')
glib_conf.set('HAVE_LONG_LONG', 1)
have_long_long = true
else
have_long_long = false
endif
# Test whether the compiler supports the 'long double' type.
if cc.compiles('''/* The Stardent Vistra knows sizeof(long double), but does not support it. */
long double foo = 0.0;
/* On Ultrix 4.3 cc, long double is 4 and double is 8. */
int array [2*(sizeof(long double) >= sizeof(double)) - 1];''',
name : 'long double')
glib_conf.set('HAVE_LONG_DOUBLE', 1)
endif
# Test whether <stddef.h> has the 'wchar_t' type.
if cc.has_header_symbol('stddef.h', 'wchar_t')
glib_conf.set('HAVE_WCHAR_T', 1)
endif
# Test whether <wchar.h> has the 'wint_t' type.
if cc.has_header_symbol('wchar.h', 'wint_t')
glib_conf.set('HAVE_WINT_T', 1)
endif
found_uintmax_t = false
# Define HAVE_INTTYPES_H_WITH_UINTMAX if <inttypes.h> exists,
# doesn't clash with <sys/types.h>, and declares uintmax_t.
# jm_AC_HEADER_INTTYPES_H
if cc.compiles('''#include <sys/types.h>
#include <inttypes.h>
void some_func (void) {
uintmax_t i = (uintmax_t) -1;
}''', name : 'uintmax_t in inttypes.h')
glib_conf.set('HAVE_INTTYPES_H_WITH_UINTMAX', 1)
found_uintmax_t = true
endif
# Define HAVE_STDINT_H_WITH_UINTMAX if <stdint.h> exists,
# doesn't clash with <sys/types.h>, and declares uintmax_t.
# jm_AC_HEADER_STDINT_H
if cc.compiles('''#include <sys/types.h>
#include <stdint.h>
void some_func (void) {
uintmax_t i = (uintmax_t) -1;
}''', name : 'uintmax_t in stdint.h')
glib_conf.set('HAVE_STDINT_H_WITH_UINTMAX', 1)
found_uintmax_t = true
endif
# Define intmax_t to 'long' or 'long long'
# if it is not already defined in <stdint.h> or <inttypes.h>.
# For simplicity, we assume that a header file defines 'intmax_t' if and
# only if it defines 'uintmax_t'.
if found_uintmax_t
glib_conf.set('HAVE_INTMAX_T', 1)
elif have_long_long
glib_conf.set('intmax_t', 'long long')
else
glib_conf.set('intmax_t', 'long')
endif
char_size = cc.sizeof('char')
short_size = cc.sizeof('short')
int_size = cc.sizeof('int')
voidp_size = cc.sizeof('void*')
long_size = cc.sizeof('long')
if have_long_long
long_long_size = cc.sizeof('long long')
else
long_long_size = 0
endif
sizet_size = cc.sizeof('size_t')
if cc.get_id() == 'msvc' or cc.get_id() == 'clang-cl'
ssizet_size = cc.sizeof('SSIZE_T', prefix : '#include <BaseTsd.h>')
else
ssizet_size = cc.sizeof('ssize_t', prefix : '#include <unistd.h>')
endif
# Some platforms (Apple) hard-code int64_t to long long instead of
# using long on 64-bit architectures. This can cause type mismatch
# warnings when trying to interface with code using the standard
# library type. Test for the warnings and set gint64 to whichever
# works.
if long_long_size == long_size
if cc.compiles('''#if defined(_AIX) && !defined(__GNUC__)
#pragma options langlvl=stdc99
#endif
#pragma GCC diagnostic error "-Wincompatible-pointer-types"
#include <stdint.h>
#include <stdio.h>
int main () {
int64_t i1 = 1;
long *i2 = &i1;
return 1;
}''', name : 'int64_t is long')
int64_t_typedef = 'long'
elif cc.compiles('''#if defined(_AIX) && !defined(__GNUC__)
#pragma options langlvl=stdc99
#endif
#pragma GCC diagnostic error "-Wincompatible-pointer-types"
#include <stdint.h>
#include <stdio.h>
int main () {
int64_t i1 = 1;
long long *i2 = &i1;
return 1;
}''', name : 'int64_t is long long')
int64_t_typedef = 'long long'
endif
endif
int64_m = 'll'
char_align = cc.alignment('char')
short_align = cc.alignment('short')
int_align = cc.alignment('int')
voidp_align = cc.alignment('void*')
long_align = cc.alignment('long')
long_long_align = cc.alignment('long long')
# NOTE: We don't check for size of __int64 because long long is guaranteed to
# be 64-bit in C99, and it is available on all supported compilers
sizet_align = cc.alignment('size_t')
glib_conf.set('ALIGNOF_UNSIGNED_LONG', long_align)
glib_conf.set('SIZEOF_CHAR', char_size)
glib_conf.set('SIZEOF_INT', int_size)
glib_conf.set('SIZEOF_SHORT', short_size)
glib_conf.set('SIZEOF_LONG', long_size)
glib_conf.set('SIZEOF_LONG_LONG', long_long_size)
glib_conf.set('SIZEOF_SIZE_T', sizet_size)
glib_conf.set('SIZEOF_SSIZE_T', ssizet_size)
glib_conf.set('SIZEOF_VOID_P', voidp_size)
glib_conf.set('SIZEOF_WCHAR_T', cc.sizeof('wchar_t', prefix: '#include <stddef.h>'))
if short_size == 2
gint16 = 'short'
gint16_modifier='h'
gint16_format='hi'
guint16_format='hu'
elif int_size == 2
gint16 = 'int'
gint16_modifier=''
gint16_format='i'
guint16_format='u'
else
error('Compiler provides no native 16-bit integer type')
endif
glibconfig_conf.set('gint16', gint16)
glibconfig_conf.set_quoted('gint16_modifier', gint16_modifier)
glibconfig_conf.set_quoted('gint16_format', gint16_format)
glibconfig_conf.set_quoted('guint16_format', guint16_format)
if short_size == 4
gint32 = 'short'
gint32_modifier='h'
gint32_format='hi'
guint32_format='hu'
guint32_align = short_align
elif int_size == 4
gint32 = 'int'
gint32_modifier=''
gint32_format='i'
guint32_format='u'
guint32_align = int_align
elif long_size == 4
gint32 = 'long'
gint32_modifier='l'
gint32_format='li'
guint32_format='lu'
guint32_align = long_align
else
error('Compiler provides no native 32-bit integer type')
endif
glibconfig_conf.set('gint32', gint32)
glibconfig_conf.set_quoted('gint32_modifier', gint32_modifier)
glibconfig_conf.set_quoted('gint32_format', gint32_format)
glibconfig_conf.set_quoted('guint32_format', guint32_format)
glib_conf.set('ALIGNOF_GUINT32', guint32_align)
if int_size == 8
gint64 = 'int'
gint64_modifier=''
gint64_format='i'
guint64_format='u'
glib_extension=''
gint64_constant='(val)'
guint64_constant='(val)'
guint64_align = int_align
elif long_size == 8 and (long_long_size != long_size or int64_t_typedef == 'long')
gint64 = 'long'
glib_extension=''
gint64_modifier='l'
gint64_format='li'
guint64_format='lu'
gint64_constant='(val##L)'
guint64_constant='(val##UL)'
guint64_align = long_align
elif long_long_size == 8 and (long_long_size != long_size or int64_t_typedef == 'long long')
gint64 = 'long long'
glib_extension='G_GNUC_EXTENSION '
gint64_modifier=int64_m
gint64_format=int64_m + 'i'
guint64_format=int64_m + 'u'
gint64_constant='(G_GNUC_EXTENSION (val##LL))'
guint64_constant='(G_GNUC_EXTENSION (val##ULL))'
guint64_align = long_long_align
else
error('Compiler provides no native 64-bit integer type')
endif
glibconfig_conf.set('glib_extension', glib_extension)
glibconfig_conf.set('gint64', gint64)
glibconfig_conf.set_quoted('gint64_modifier', gint64_modifier)
glibconfig_conf.set_quoted('gint64_format', gint64_format)
glibconfig_conf.set_quoted('guint64_format', guint64_format)
glibconfig_conf.set('gint64_constant', gint64_constant)
glibconfig_conf.set('guint64_constant', guint64_constant)
glib_conf.set('ALIGNOF_GUINT64', guint64_align)
if host_system == 'windows'
glibconfig_conf.set('g_pid_type', 'void*')
glibconfig_conf.set_quoted('g_pid_format', 'p')
if host_machine.cpu_family() == 'x86_64'
glibconfig_conf.set_quoted('g_pollfd_format', '%#' + int64_m + 'x')
else
glibconfig_conf.set_quoted('g_pollfd_format', '%#x')
endif
glibconfig_conf.set('g_dir_separator', '\\\\')
glibconfig_conf.set('g_searchpath_separator', ';')
else
glibconfig_conf.set('g_pid_type', 'int')
glibconfig_conf.set_quoted('g_pid_format', 'i')
glibconfig_conf.set_quoted('g_pollfd_format', '%d')
glibconfig_conf.set('g_dir_separator', '/')
glibconfig_conf.set('g_searchpath_separator', ':')
endif
g_sizet_compatibility = {
'short': sizet_size == short_size,
'int': sizet_size == int_size,
'long': sizet_size == long_size,
'long long': sizet_size == long_long_size,
}
# Do separate checks for gcc/clang (and ignore other compilers for now), since
# we need to explicitly pass -Werror to the compilers.
# FIXME: https://github.com/mesonbuild/meson/issues/5399
if cc.get_id() == 'gcc' or cc.get_id() == 'clang'
foreach type_name, size_compatibility : g_sizet_compatibility
g_sizet_compatibility += { type_name: size_compatibility and
cc.compiles(
'''#include <stddef.h>
size_t f (size_t *i) { return *i + 1; }
int main (void) {
unsigned ''' + type_name + ''' i = 0;
f (&i);
return 0;
}''',
args: ['-Werror'],
name : 'GCC size_t typedef is ' + type_name), }
endforeach
endif
if g_sizet_compatibility['short']
glibconfig_conf.set('glib_size_type_define', 'short')
glibconfig_conf.set_quoted('gsize_modifier', 'h')
glibconfig_conf.set_quoted('gssize_modifier', 'h')
glibconfig_conf.set_quoted('gsize_format', 'hu')
glibconfig_conf.set_quoted('gssize_format', 'hi')
glibconfig_conf.set('glib_msize_type', 'SHRT')
elif g_sizet_compatibility['int']
glibconfig_conf.set('glib_size_type_define', 'int')
glibconfig_conf.set_quoted('gsize_modifier', '')
glibconfig_conf.set_quoted('gssize_modifier', '')
glibconfig_conf.set_quoted('gsize_format', 'u')
glibconfig_conf.set_quoted('gssize_format', 'i')
glibconfig_conf.set('glib_msize_type', 'INT')
elif g_sizet_compatibility['long']
glibconfig_conf.set('glib_size_type_define', 'long')
glibconfig_conf.set_quoted('gsize_modifier', 'l')
glibconfig_conf.set_quoted('gssize_modifier', 'l')
glibconfig_conf.set_quoted('gsize_format', 'lu')
glibconfig_conf.set_quoted('gssize_format', 'li')
glibconfig_conf.set('glib_msize_type', 'LONG')
elif g_sizet_compatibility['long long']
glibconfig_conf.set('glib_size_type_define', 'long long')
glibconfig_conf.set_quoted('gsize_modifier', int64_m)
glibconfig_conf.set_quoted('gssize_modifier', int64_m)
glibconfig_conf.set_quoted('gsize_format', int64_m + 'u')
glibconfig_conf.set_quoted('gssize_format', int64_m + 'i')
glibconfig_conf.set('glib_msize_type', 'INT64')
else
error('Could not determine size of size_t.')
endif
if voidp_size == int_size
glibconfig_conf.set('glib_intptr_type_define', 'int')
glibconfig_conf.set_quoted('gintptr_modifier', '')
glibconfig_conf.set_quoted('gintptr_format', 'i')
glibconfig_conf.set_quoted('guintptr_format', 'u')
glibconfig_conf.set('glib_gpi_cast', '(gint)')
glibconfig_conf.set('glib_gpui_cast', '(guint)')
elif voidp_size == long_size
glibconfig_conf.set('glib_intptr_type_define', 'long')
glibconfig_conf.set_quoted('gintptr_modifier', 'l')
glibconfig_conf.set_quoted('gintptr_format', 'li')
glibconfig_conf.set_quoted('guintptr_format', 'lu')
glibconfig_conf.set('glib_gpi_cast', '(glong)')
glibconfig_conf.set('glib_gpui_cast', '(gulong)')
elif voidp_size == long_long_size
glibconfig_conf.set('glib_intptr_type_define', 'long long')
glibconfig_conf.set_quoted('gintptr_modifier', int64_m)
glibconfig_conf.set_quoted('gintptr_format', int64_m + 'i')
glibconfig_conf.set_quoted('guintptr_format', int64_m + 'u')
glibconfig_conf.set('glib_gpi_cast', '(gint64)')
glibconfig_conf.set('glib_gpui_cast', '(guint64)')
else
error('Could not determine size of void *')
endif
if long_size != 8 and long_long_size != 8 and int_size != 8
error('GLib requires a 64-bit type. You might want to consider using the GNU C compiler.')
endif
glibconfig_conf.set('gintbits', int_size * 8)
glibconfig_conf.set('glongbits', long_size * 8)
glibconfig_conf.set('gsizebits', sizet_size * 8)
glibconfig_conf.set('gssizebits', ssizet_size * 8)
# XXX: https://gitlab.gnome.org/GNOME/glib/issues/1413
if host_system == 'windows'
g_module_suffix = 'dll'
else
g_module_suffix = 'so'
endif
glibconfig_conf.set('g_module_suffix', g_module_suffix)
glibconfig_conf.set('GLIB_MAJOR_VERSION', major_version)
glibconfig_conf.set('GLIB_MINOR_VERSION', minor_version)
glibconfig_conf.set('GLIB_MICRO_VERSION', micro_version)
glibconfig_conf.set('GLIB_VERSION', glib_version)
glibconfig_conf.set('glib_void_p', voidp_size)
glibconfig_conf.set('glib_long', long_size)
glibconfig_conf.set('glib_size_t', sizet_size)
glibconfig_conf.set('glib_ssize_t', ssizet_size)
if host_machine.endian() == 'big'
glibconfig_conf.set('g_byte_order', 'G_BIG_ENDIAN')
glibconfig_conf.set('g_bs_native', 'BE')
glibconfig_conf.set('g_bs_alien', 'LE')
else
glibconfig_conf.set('g_byte_order', 'G_LITTLE_ENDIAN')
glibconfig_conf.set('g_bs_native', 'LE')
glibconfig_conf.set('g_bs_alien', 'BE')
endif
# === va_copy checks ===
# we currently check for all three va_copy possibilities, so we get
# all results in config.log for bug reports.
va_copy_func = ''
foreach try_func : [ '__va_copy', 'va_copy' ]
if cc.compiles('''#include <stdarg.h>
#include <stdlib.h>
#ifdef _MSC_VER
# include "msvc_recommended_pragmas.h"
#endif
void f (int i, ...) {
va_list args1, args2;
va_start (args1, i);
@0@ (args2, args1);
if (va_arg (args2, int) != 42 || va_arg (args1, int) != 42)
exit (1);
va_end (args1); va_end (args2);
}
int main() {
f (0, 42);
return 0;
}'''.format(try_func),
name : try_func + ' check')
va_copy_func = try_func
endif
endforeach
if va_copy_func != ''
glib_conf.set('G_VA_COPY', va_copy_func)
glib_vacopy = '#define G_VA_COPY ' + va_copy_func
else
glib_vacopy = '/* #undef G_VA_COPY */'
endif
va_list_val_copy_prog = '''
#include <stdarg.h>
#include <stdlib.h>
void f (int i, ...) {
va_list args1, args2;
va_start (args1, i);
args2 = args1;
if (va_arg (args2, int) != 42 || va_arg (args1, int) != 42)
exit (1);
va_end (args1); va_end (args2);
}
int main() {
f (0, 42);
return 0;
}'''
if cc_can_run
rres = cc.run(va_list_val_copy_prog, name : 'va_lists can be copied as values')
glib_va_val_copy = rres.compiled() and rres.returncode() == 0
else
glib_va_val_copy = meson.get_external_property('va_val_copy', true)
endif
if not glib_va_val_copy
glib_vacopy = glib_vacopy + '\n#define G_VA_COPY_AS_ARRAY 1'
glib_conf.set('G_VA_COPY_AS_ARRAY', 1)
endif
glibconfig_conf.set('glib_vacopy', glib_vacopy)
# check for flavours of varargs macros
g_have_iso_c_varargs = cc.compiles('''
void some_func (void) {
int a(int p1, int p2, int p3);
#define call_a(...) a(1,__VA_ARGS__)
call_a(2,3);
}''', name : 'ISO C99 varargs macros in C')
if not g_have_iso_c_varargs
error('GLib requires a C compiler with support for C99 __VA_ARG__ in macros.')
endif
g_have_iso_cxx_varargs = cxx.compiles('''
void some_func (void) {
int a(int p1, int p2, int p3);
#define call_a(...) a(1,__VA_ARGS__)
call_a(2,3);
}''', name : 'ISO C99 varargs macros in C++')
if not g_have_iso_cxx_varargs
error('GLib requires a C++ compiler with support for C99 __VA_ARG__ in macros.')
endif
g_have_gnuc_varargs = cc.compiles('''
void some_func (void) {
int a(int p1, int p2, int p3);
#define call_a(params...) a(1,params)
call_a(2,3);
}''', name : 'GNUC varargs macros')
if cc.has_header('alloca.h')
glibconfig_conf.set('GLIB_HAVE_ALLOCA_H', true)
endif
has_syspoll = cc.has_header('sys/poll.h')
has_systypes = cc.has_header('sys/types.h')
if has_syspoll
glibconfig_conf.set('GLIB_HAVE_SYS_POLL_H', true)
endif
has_winsock2 = cc.has_header('winsock2.h')
if has_syspoll and has_systypes
poll_includes = '''
#include<sys/poll.h>
#include<sys/types.h>'''
elif has_winsock2
poll_includes = '''
#define _WIN32_WINNT @0@
#include <winsock2.h>'''.format(glib_conf.get('_WIN32_WINNT'))
else
# FIXME?
error('FIX POLL* defines')
endif
poll_defines = [
[ 'POLLIN', 'g_pollin', 1 ],
[ 'POLLOUT', 'g_pollout', 4 ],
[ 'POLLPRI', 'g_pollpri', 2 ],
[ 'POLLERR', 'g_pollerr', 8 ],
[ 'POLLHUP', 'g_pollhup', 16 ],
[ 'POLLNVAL', 'g_pollnval', 32 ],
]
if has_syspoll and has_systypes
foreach d : poll_defines
val = cc.compute_int(d[0], prefix: poll_includes)
glibconfig_conf.set(d[1], val)
endforeach
elif has_winsock2
# Due to a missed bug in configure.ac the poll test
# never succeeded on Windows and used some pre-defined
# values as a fallback. Keep using them to maintain
# ABI compatibility with autotools builds of glibs
# and with *any* glib-using code compiled against them,
# since these values end up in a public header glibconfig.h.
foreach d : poll_defines
glibconfig_conf.set(d[1], d[2])
endforeach
endif
# Internet address families
# FIXME: what about Cygwin (G_WITH_CYGWIN)
if host_system == 'windows'
inet_includes = '''
#include <winsock2.h>'''
else
inet_includes = '''
#include <sys/types.h>
#include <sys/socket.h>'''
endif
inet_defines = [
[ 'AF_UNIX', 'g_af_unix' ],
[ 'AF_INET', 'g_af_inet' ],
[ 'AF_INET6', 'g_af_inet6' ],
[ 'MSG_OOB', 'g_msg_oob' ],
[ 'MSG_PEEK', 'g_msg_peek' ],
[ 'MSG_DONTROUTE', 'g_msg_dontroute' ],
]
foreach d : inet_defines
val = cc.compute_int(d[0], prefix: inet_includes)
glibconfig_conf.set(d[1], val)
endforeach
if host_system == 'windows'
have_ipv6 = true
else
have_ipv6 = cc.has_type('struct in6_addr', prefix: '#include <netinet/in.h>')
endif
glib_conf.set('HAVE_IPV6', have_ipv6)
# We need to decide at configure time if GLib will use real atomic
# operations ("lock free") or emulated ones with a mutex. This is
# because we must put this information in glibconfig.h so we know if
# it is safe or not to inline using compiler intrinsics directly from
# the header.
#
# We also publish the information via G_ATOMIC_LOCK_FREE in case the
# user is interested in knowing if they can use the atomic ops across
# processes.
#
# We can currently support the atomic ops natively when building GLib
# with recent versions of GCC or MSVC.
#
# Note that the atomic ops are only available with GCC on x86 when
# using -march=i486 or higher. If we detect that the atomic ops are
# not available but would be available given the right flags, we want
# to abort and advise the user to fix their CFLAGS. It's better to do
# that then to silently fall back on emulated atomic ops just because
# the user had the wrong build environment.
atomictest = '''int main() {
int atomic = 2;
__sync_bool_compare_and_swap (&atomic, 2, 3);
return 0;
}
'''
atomicdefine = '''
#ifndef __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4
#error "compiler has atomic ops, but doesn't define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4"
#endif
'''
# We know that we can always use real ("lock free") atomic operations with MSVC
if cc.get_id() == 'msvc' or cc.get_id() == 'clang-cl' or cc.links(atomictest, name : 'atomic ops')
have_atomic_lock_free = true
if cc.get_id() == 'gcc' and not cc.compiles(atomicdefine, name : 'atomic ops define')
# Old gcc release may provide
# __sync_bool_compare_and_swap but doesn't define
# __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4
glib_conf.set('__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4', true)
endif
if cc.get_id() == 'gcc' or cc.get_id() == 'clang'
sync_swap_test = '''
int main() {
int atomic = 2;
__sync_swap (&atomic, 2);
return 0;
}
'''
glib_conf.set('_GLIB_GCC_HAVE_SYNC_SWAP', cc.links(sync_swap_test, name : 'sync swap'))
endif
else
have_atomic_lock_free = false
if host_machine.cpu_family() == 'x86' and cc.links(atomictest, args : '-march=i486')
error('GLib must be built with -march=i486 or later.')
endif
endif
glibconfig_conf.set('G_ATOMIC_LOCK_FREE', have_atomic_lock_free)
# === Threads ===
if get_option('force_posix_threads')
warning('DEPRECATION: Option \'force_posix_threads\' is deprecated and will be removed after GLib 2.72; please file an issue with your use case if you still require it')
endif
# Determination of thread implementation
if host_system == 'windows' and not get_option('force_posix_threads')
thread_dep = []
threads_implementation = 'win32'
glibconfig_conf.set('g_threads_impl_def', 'WIN32')
glib_conf.set('THREADS_WIN32', 1)
else
thread_dep = dependency('threads')
threads_implementation = 'posix'
pthread_prefix = '''
#ifndef _GNU_SOURCE
# define _GNU_SOURCE
#endif
#include <pthread.h>'''
glibconfig_conf.set('g_threads_impl_def', 'POSIX')
glib_conf.set('THREADS_POSIX', 1)
if cc.has_header_symbol('pthread.h', 'pthread_attr_setstacksize')
glib_conf.set('HAVE_PTHREAD_ATTR_SETSTACKSIZE', 1)
endif
if cc.has_header_symbol('pthread.h', 'pthread_attr_setinheritsched')
glib_conf.set('HAVE_PTHREAD_ATTR_SETINHERITSCHED', 1)
endif
if cc.has_header_symbol('pthread.h', 'pthread_condattr_setclock')
glib_conf.set('HAVE_PTHREAD_CONDATTR_SETCLOCK', 1)
endif
if cc.has_header_symbol('pthread.h', 'pthread_cond_timedwait_relative_np')
glib_conf.set('HAVE_PTHREAD_COND_TIMEDWAIT_RELATIVE_NP', 1)
endif
if cc.has_header_symbol('pthread.h', 'pthread_getname_np', prefix : pthread_prefix)
glib_conf.set('HAVE_PTHREAD_GETNAME_NP', 1)
endif
if cc.has_header_symbol('sys/syscall.h', 'SYS_sched_getattr')
glib_conf.set('HAVE_SYS_SCHED_GETATTR', 1)
endif
# Assume that pthread_setname_np is available in some form; same as configure
if cc.links(pthread_prefix + '''
int main() {
pthread_setname_np("example");
return 0;
}''',
name : 'pthread_setname_np(const char*)',
dependencies : thread_dep)
# macOS and iOS
glib_conf.set('HAVE_PTHREAD_SETNAME_NP_WITHOUT_TID', 1)
elif cc.links(pthread_prefix + '''
int main() {
pthread_setname_np(pthread_self(), "example");
return 0;
}''',
name : 'pthread_setname_np(pthread_t, const char*)',
dependencies : thread_dep)
# Linux, Solaris, etc.
glib_conf.set('HAVE_PTHREAD_SETNAME_NP_WITH_TID', 1)
elif cc.links(pthread_prefix + '''
int main() {
pthread_setname_np(pthread_self(), "%s", "example");
return 0;
}''',
name : 'pthread_setname_np(pthread_t, const char*, void*)',
dependencies : thread_dep)
# NetBSD
glib_conf.set('HAVE_PTHREAD_SETNAME_NP_WITH_TID_AND_ARG', 1)
elif cc.links(pthread_prefix + '''
#include <pthread_np.h>
int main() {
pthread_set_name_np(pthread_self(), "example");
return 0;
}''',
name : 'pthread_set_name_np(pthread_t, const char*)',
dependencies : thread_dep)
# FreeBSD, DragonFlyBSD, OpenBSD, etc.
glib_conf.set('HAVE_PTHREAD_SET_NAME_NP', 1)
endif
endif
# FIXME: we should make it print the result and always return 0, so that
# the output in meson shows up as green
# volatile is needed here to avoid optimisations in the test
stack_grows_check_prog = '''
volatile int *a = 0, *b = 0;
void f (int i) {
volatile int x = 5;
if (i == 0)
b = &x;
else
f (i - 1);
}
int main () {
volatile int y = 7;
a = &y;
f (100);
return b > a ? 0 : 1;
}'''
if cc_can_run
rres = cc.run(stack_grows_check_prog, name : 'stack grows check')
growing_stack = rres.compiled() and rres.returncode() == 0
else
growing_stack = meson.get_external_property('growing_stack', false)
endif
glibconfig_conf.set10('G_HAVE_GROWING_STACK', growing_stack)
# Tests for iconv
#
# We should never use the MinGW C library's iconv because it may not be
# available in the actual runtime environment. On Windows, we always use
# the built-in implementation
if host_system == 'windows'
# We have a #include "win_iconv.c" in gconvert.c on Windows, so we don't need
# any external library for it
libiconv = []
else
libiconv = dependency('iconv')
endif
pcre = dependency('libpcre', version: '>= 8.31', required : false) # Should check for Unicode support, too. FIXME
if not pcre.found()
if cc.get_id() == 'msvc' or cc.get_id() == 'clang-cl'
# MSVC: Search for the PCRE library by the configuration, which corresponds
# to the output of CMake builds of PCRE. Note that debugoptimized
# is really a Release build with .PDB files.
if vs_crt == 'debug'
pcre = cc.find_library('pcred', required : false)
else
pcre = cc.find_library('pcre', required : false)
endif
endif
endif
# Try again with the fallback
if not pcre.found()
pcre = dependency('libpcre', required : true, fallback : ['pcre', 'pcre_dep'])
use_pcre_static_flag = true
elif host_system == 'windows'
pcre_static = cc.links('''#define PCRE_STATIC
#include <pcre.h>
int main() {
void *p = NULL;
pcre_free(p);
return 0;
}''',
dependencies: pcre,
name : 'Windows system PCRE is a static build')
use_pcre_static_flag = pcre_static
else
use_pcre_static_flag = false
endif
# Import the gvdb sources as a subproject to avoid having the copylib in-tree
subproject('gvdb')
gvdb_dep = dependency('gvdb')
libm = cc.find_library('m', required : false)
libffi_dep = dependency('libffi', version : '>= 3.0.0', fallback : ['libffi', 'ffi_dep'])
libz_dep = dependency('zlib')
# First check in libc, fallback to libintl, and as last chance build
# proxy-libintl subproject.
# FIXME: glib-gettext.m4 has much more checks to detect broken/uncompatible
# implementations. This could be extended if issues are found in some platforms.
libintl_deps = []
libintl = dependency('intl', required: false)
if libintl.found()
# libintl supports different threading APIs, which may not
# require additional flags, but it defaults to using pthreads if
# found. Meson's "threads" dependency does not allow you to
# prefer pthreads. We may not be using pthreads for glib itself
# either so just link the library to satisfy libintl rather than
# also defining the macros with the -pthread flag.
#
# Meson's builtin dependency lookup as of 0.60.0 doesn't check for
# pthread, so we do this manually here.
if cc.has_function('ngettext', dependencies : libintl)
libintl_deps += [libintl]
else
libintl_pthread = cc.find_library('pthread', required : false)
if libintl_pthread.found() and cc.has_function('ngettext', dependencies : [libintl, libintl_pthread])
libintl_deps += [libintl, libintl_pthread]
else
libintl = disabler()
endif
endif
endif
if libintl.found()
have_bind_textdomain_codeset = cc.has_function('bind_textdomain_codeset', dependencies: libintl_deps)
else
libintl = subproject('proxy-libintl').get_variable('intl_dep')
libintl_deps = [libintl]
have_bind_textdomain_codeset = true # proxy-libintl supports it
endif
glib_conf.set('HAVE_BIND_TEXTDOMAIN_CODESET', have_bind_textdomain_codeset)
# We require gettext to always be present
glib_conf.set('HAVE_DCGETTEXT', 1)
glib_conf.set('HAVE_GETTEXT', 1)
glib_conf.set_quoted('GLIB_LOCALE_DIR', join_paths(glib_datadir, 'locale'))
# libmount is only used by gio, but we need to fetch the libs to generate the
# pkg-config file below
libmount_dep = []
if host_system == 'linux'
libmount_dep = dependency('mount', version : '>=2.23', required : get_option('libmount'))
glib_conf.set('HAVE_LIBMOUNT', libmount_dep.found())
endif
if host_system == 'windows'
winsock2 = cc.find_library('ws2_32')
else
winsock2 = not_found
endif
selinux_dep = []
if host_system == 'linux'
selinux_dep = dependency('libselinux', version: '>=2.2', required: get_option('selinux'))
glib_conf.set('HAVE_SELINUX', selinux_dep.found())
endif
xattr_dep = []
if host_system != 'windows' and get_option('xattr')
# either glibc or libattr can provide xattr support
# for both of them, we check for getxattr being in
# the library and a valid xattr header.
# try glibc
if cc.has_function('getxattr') and cc.has_header('sys/xattr.h')
glib_conf.set('HAVE_SYS_XATTR_H', 1)
glib_conf_prefix = glib_conf_prefix + '#define @0@ 1\n'.format('HAVE_SYS_XATTR_H')
#failure. try libattr
elif cc.has_header_symbol('attr/xattr.h', 'getxattr')
glib_conf.set('HAVE_ATTR_XATTR_H', 1)
glib_conf_prefix = glib_conf_prefix + '#define @0@ 1\n'.format('HAVE_ATTR_XATTR_H')
xattr_dep = [cc.find_library('xattr')]
else
error('No getxattr implementation found in C library or libxattr')
endif
glib_conf.set('HAVE_XATTR', 1)
if cc.compiles(glib_conf_prefix + '''
#include <stdio.h>
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_XATTR_H
#include <sys/xattr.h>
#elif HAVE_ATTR_XATTR_H
#include <attr/xattr.h>
#endif
int main (void) {
ssize_t len = getxattr("", "", NULL, 0, 0, XATTR_NOFOLLOW);
return len;
}''',
name : 'XATTR_NOFOLLOW')
glib_conf.set('HAVE_XATTR_NOFOLLOW', 1)
endif
endif
# If strlcpy is present (BSD and similar), check that it conforms to the BSD
# specification. Specifically Solaris 8's strlcpy() does not, see
# https://bugzilla.gnome.org/show_bug.cgi?id=53933 for further context.
if cc.has_function('strlcpy')
if cc_can_run
rres = cc.run('''#include <stdlib.h>
#include <string.h>
int main() {
char p[10];
(void) strlcpy (p, "hi", 10);
if (strlcat (p, "bye", 0) != 3)
return 1;
return 0;
}''',
name : 'OpenBSD strlcpy/strlcat')
if rres.compiled() and rres.returncode() == 0
glib_conf.set('HAVE_STRLCPY', 1)
endif
elif meson.get_external_property('have_strlcpy', false)
glib_conf.set('HAVE_STRLCPY', 1)
endif
endif
cmdline_test_code = '''
#include <fcntl.h>
#include <sys/stat.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
static int
__getcmdline (void)
{
/* This code is a dumbed-down version of g_file_get_contents() */
#ifndef O_BINARY
#define O_BINARY 0
#endif
#define BUFSIZE 1024
char result[BUFSIZE];
struct stat stat_buf;
int fd = open ("/proc/self/cmdline", O_RDONLY|O_BINARY);
if (fd < 0)
exit (1);
if (fstat (fd, &stat_buf))
exit (1);
if (stat_buf.st_size > 0 && S_ISREG (stat_buf.st_mode))
{
if (read (fd, result, BUFSIZE) <= 0)
exit (1);
}
else
{
FILE *f = fdopen (fd, "r");
if (f == NULL)
exit (1);
if (fread (result, 1, BUFSIZE, f) <= 0)
exit (1);
}
return 0;
}
int
main (void)
{
exit (__getcmdline ());
}'''
if cc_can_run
rres = cc.run(cmdline_test_code, name : '/proc/self/cmdline')
have_proc_self_cmdline = rres.compiled() and rres.returncode() == 0
else
have_proc_self_cmdline = meson.get_external_property('have_proc_self_cmdline', false)
endif
glib_conf.set('HAVE_PROC_SELF_CMDLINE', have_proc_self_cmdline)
python = import('python').find_installation('python3')
# used for '#!/usr/bin/env <name>'
python_name = 'python3'
python_version = python.language_version()
python_version_req = '>=3.5'
if not python_version.version_compare(python_version_req)
error('Requires Python @0@, @1@ found.'.format(python_version_req, python_version))
endif
# Determine which user environment-dependent files that we want to install
have_bash = find_program('bash', required : false).found() # For completion scripts
bash_comp_dep = dependency('bash-completion', version: '>=2.0', required: false)
have_sh = find_program('sh', required : false).found() # For glib-gettextize
# Some installed tests require a custom environment
env_program = find_program('env', required: installed_tests_enabled)
# FIXME: How to detect Solaris? https://github.com/mesonbuild/meson/issues/1578
if host_system == 'sunos'
glib_conf.set('_XOPEN_SOURCE_EXTENDED', 1)
glib_conf.set('_XOPEN_SOURCE', 2)
glib_conf.set('__EXTENSIONS__',1)
endif
# Sadly Meson does not expose this value:
# https://github.com/mesonbuild/meson/pull/3460
if host_system == 'windows'
# Autotools explicitly removed --Wl,--export-all-symbols from windows builds,
# with no explanation. Do the same here for now but this could be revisited if
# if causes issues.
export_dynamic_ldflags = []
elif host_system == 'cygwin'
export_dynamic_ldflags = ['-Wl,--export-all-symbols']
elif host_system in ['darwin', 'ios']
export_dynamic_ldflags = []
elif host_system == 'sunos'
export_dynamic_ldflags = []
else
export_dynamic_ldflags = ['-Wl,--export-dynamic']
endif
win32_cflags = []
win32_ldflags = []
if host_system == 'windows' and cc.get_id() != 'msvc' and cc.get_id() != 'clang-cl'
# Ensure MSVC-compatible struct packing convention is used when
# compiling for Win32 with gcc. It is used for the whole project and exposed
# in glib-2.0.pc.
win32_cflags = ['-mms-bitfields']
add_project_arguments(win32_cflags, language : 'c')
# Win32 API libs, used only by libglib and exposed in glib-2.0.pc
win32_ldflags = ['-lws2_32', '-lole32', '-lwinmm', '-lshlwapi', '-luuid']
elif host_system == 'cygwin'
win32_ldflags = ['-luser32', '-lkernel32']
endif
# Tracing: dtrace
want_dtrace = get_option('dtrace')
enable_dtrace = false
# Since dtrace support is opt-in we just error out if it was requested but
# is not available. We don't bother with autodetection yet.
if want_dtrace
if glib_have_carbon
error('GLib dtrace support not yet compatible with macOS dtrace')
endif
dtrace = find_program('dtrace', required : true) # error out if not found
if not cc.has_header('sys/sdt.h')
error('dtrace support needs sys/sdt.h header')
endif
# FIXME: autotools build also passes -fPIC -DPIC but is it needed in this case?
dtrace_obj_gen = generator(dtrace,
output : '@BASENAME@.o',
arguments : ['-G', '-s', '@INPUT@', '-o', '@OUTPUT@'])
# FIXME: $(SED) -e "s,define STAP_HAS_SEMAPHORES 1,undef STAP_HAS_SEMAPHORES,"
# -e "s,define _SDT_HAS_SEMAPHORES 1,undef _SDT_HAS_SEMAPHORES,"
dtrace_hdr_gen = generator(dtrace,
output : '@BASENAME@.h',
arguments : ['-h', '-s', '@INPUT@', '-o', '@OUTPUT@'])
glib_conf.set('HAVE_DTRACE', 1)
enable_dtrace = true
endif
# systemtap
want_systemtap = get_option('systemtap')
enable_systemtap = false
if want_systemtap and enable_dtrace
tapset_install_dir = get_option('tapset_install_dir')
if tapset_install_dir == ''
tapset_install_dir = join_paths(get_option('datadir'), 'systemtap/tapset', host_machine.cpu_family())
endif
stp_cdata = configuration_data()
stp_cdata.set('ABS_GLIB_RUNTIME_LIBDIR', glib_libdir)
stp_cdata.set('LT_CURRENT', minor_version * 100)
stp_cdata.set('LT_REVISION', micro_version)
enable_systemtap = true
endif
test_timeout = 60
test_timeout_slow = 180
pkg = import('pkgconfig')
windows = import('windows')
subdir('glib')
subdir('gobject')
subdir('gthread')
subdir('gmodule')
subdir('gio')
subdir('fuzzing')
subdir('tools')
# xgettext is optional (on Windows for instance)
if find_program('xgettext', required : get_option('nls')).found()
subdir('po')
endif
# Install m4 macros that other projects use
install_data('m4macros/glib-2.0.m4', 'm4macros/glib-gettext.m4', 'm4macros/gsettings.m4',
install_dir : join_paths(get_option('datadir'), 'aclocal'))
configure_file(output : 'config.h', configuration : glib_conf)
if host_system == 'windows'
install_headers([ 'msvc_recommended_pragmas.h' ], subdir : 'glib-2.0')
endif
if get_option('man')
xsltproc = find_program('xsltproc', required : true)
xsltproc_command = [
xsltproc,
'--nonet',
'--stringparam', 'man.output.quietly', '1',
'--stringparam', 'funcsynopsis.style', 'ansi',
'--stringparam', 'man.th.extra1.suppress', '1',
'--stringparam', 'man.authors.section.enabled', '0',
'--stringparam', 'man.copyright.section.enabled', '0',
'-o', '@OUTPUT@',
'http://docbook.sourceforge.net/release/xsl/current/manpages/docbook.xsl',
'@INPUT@',
]
man1_dir = join_paths(glib_prefix, get_option('mandir'), 'man1')
endif
gnome = import('gnome')
subdir('docs/reference')
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