# 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()).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('execinfo.h', 'backtrace') config_h.set('HAVE_BACKTRACE', 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('<5') error('clang version is too old, libcamera requires 5.0 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) pkg_mod = import('pkgconfig') pkg_mod.generate(libraries : libcamera, version : '1.0', name : 'libcamera', filebase : 'camera', description : 'Complex Camera Support Library', subdirs : 'libcamera') # 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)