libcamera/meson.build
Naushir Patuck db39cc7698 build: Preserve upstream git versioning using meson dist
When distributions build and package libcamera libraries, they may not
necessarily run the build in the upstream source tree. In these cases, the git
SHA1 versioning information will be lost.

This change addresses that problem by requiring package managers to run
'meson dist' to create a tarball of the source files and build from there.
On runing 'meson dist', the utils/run-dist.sh script will create a
.tarball-version file in the release tarball with the version string generated
from the existing utils/gen-version.sh script.

The utils/gen-version.sh script has been updated to check for the presence of
this .tarball-version file and read the version string from it instead of
creating one.

Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2021-10-19 13:14:54 +03:00

184 lines
5.8 KiB
Meson

# 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]
# This script gererates the .tarball-version file on a 'meson dist' command.
meson.add_dist_script('utils/run-dist.sh')
# 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)