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# SPDX-License-Identifier: CC0-1.0
project('libcamera', 'c', 'cpp',
meson_version : '>= 0.55',
version : '0.0.0',
default_options : [
'werror=true',
'warning_level=2',
'cpp_std=c++17',
],
license : 'LGPL 2.1+')
# Generate version information. The libcamera_git_version variable contains the
# full version with git patch count and SHA1 (e.g. 1.2.3+211-c94a24f4), while
# the libcamera_version variable contains the major.minor.patch (e.g. 1.2.3)
# only. If the source tree isn't under git control, or if it matches the last
# git version tag, the build metadata (e.g. +211-c94a24f4) is omitted from
# libcamera_git_version.
libcamera_git_version = run_command('utils/gen-version.sh',
meson.build_root(),
meson.source_root()).stdout().strip()
if libcamera_git_version == ''
libcamera_git_version = meson.project_version()
endif
libcamera_version = libcamera_git_version.split('+')[0]
# Configure the build environment.
cc = meson.get_compiler('c')
cxx = meson.get_compiler('cpp')
config_h = configuration_data()
if cc.has_header_symbol('unistd.h', 'issetugid')
config_h.set('HAVE_ISSETUGID', 1)
endif
if cc.has_header_symbol('stdlib.h', 'secure_getenv', prefix : '#define _GNU_SOURCE')
config_h.set('HAVE_SECURE_GETENV', 1)
endif
common_arguments = [
'-Wshadow',
'-include', 'config.h',
]
c_arguments = []
cpp_arguments = []
if cc.get_id() == 'clang'
if cc.version().version_compare('<9')
error('clang version is too old, libcamera requires 9.0 or newer')
endif
# Turn _FORTIFY_SOURCE by default on optimised builds (as it requires -O1
# or higher). This is needed on clang only as gcc enables it by default.
if get_option('optimization') != '0'
common_arguments += [
'-D_FORTIFY_SOURCE=2',
]
endif
# Use libc++ by default if available instead of libstdc++ when compiling
# with clang.
if cc.find_library('libc++', required: false).found()
cpp_arguments += [
'-stdlib=libc++',
]
endif
cpp_arguments += [
'-Wextra-semi',
]
endif
if cc.get_id() == 'gcc'
if cc.version().version_compare('<7')
error('gcc version is too old, libcamera requires 7.0 or newer')
endif
# On gcc 7 and 8, the file system library is provided in a separate static
# library.
if cc.version().version_compare('<9')
cpp_arguments += [
'-lstdc++fs',
]
endif
# gcc 7.1 introduced processor-specific ABI breakages related to parameter
# passing on ARM platforms. This generates a large number of messages
# during compilation with gcc >=7.1. Silence them.
if (host_machine.cpu_family() == 'arm' and
cc.version().version_compare('>=7.1'))
cpp_arguments += [
'-Wno-psabi',
]
endif
endif
# We use C99 designated initializers for arrays as C++ has no equivalent
# feature. Both gcc and clang support this extension, but recent
# versions of clang generate a warning that needs to be disabled.
if cc.has_argument('-Wno-c99-designator')
common_arguments += [
'-Wno-c99-designator',
]
endif
c_arguments += common_arguments
cpp_arguments += common_arguments
add_project_arguments(c_arguments, language : 'c')
add_project_arguments(cpp_arguments, language : 'cpp')
add_project_link_arguments(cpp_arguments, language : 'cpp')
libcamera_includes = include_directories('include')
# Sub-directories fill py_modules with their dependencies.
py_modules = []
# Libraries used by multiple components
liblttng = cc.find_library('lttng-ust', required : get_option('tracing'))
# Pipeline handlers
#
# Tests require the vimc pipeline handler, include it automatically when tests
# are enabled.
pipelines = get_option('pipelines')
if get_option('test') and 'vimc' not in pipelines
message('Enabling vimc pipeline handler to support tests')
pipelines += ['vimc']
endif
# Utilities are parsed first to provide support for other components.
subdir('utils')
subdir('include')
subdir('src')
# The documentation and test components are optional and can be disabled
# through configuration values. They are enabled by default.
subdir('Documentation')
subdir('test')
if not meson.is_cross_build()
kernel_version_req = '>= 5.0.0'
kernel_version = run_command('uname', '-r').stdout().strip()
if not kernel_version.version_compare(kernel_version_req)
warning('The current running kernel version @0@ is too old to run libcamera.'
.format(kernel_version))
warning('If you intend to use libcamera on this machine, please upgrade to a kernel @0@.'
.format(kernel_version_req))
endif
endif
# Create a symlink from the build root to the source root. This is used when
# running libcamera from the build directory to locate resources in the source
# directory (such as IPA configuration files).
run_command('ln', '-fsT', meson.source_root(), meson.build_root() / 'source')
configure_file(output : 'config.h', configuration : config_h)
# Check for python installation and modules.
py_mod = import('python')
py_mod.find_installation('python3', modules: py_modules)
## Summarise Configurations
summary({
'Enabled pipelines': pipelines,
'Enabled IPA modules': ipa_modules,
'Android support': android_enabled,
'GStreamer support': gst_enabled,
'V4L2 emulation support': v4l2_enabled,
'cam application': cam_enabled,
'qcam application': qcam_enabled,
'lc-compliance application': lc_compliance_enabled,
'Unit tests': test_enabled,
},
section : 'Configuration',
bool_yn : true)
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