File: meson.build

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project(
    'openMSX', 'cpp',
    version : '0.15.0',
    license : 'GPL2',
    default_options : ['warning_level=3', 'cpp_std=c++17'],
    meson_version: '>=0.50.0'
    )

subdir('src')

# Compile Flags
# =============

compiler = meson.get_compiler('cpp')

if compiler.get_argument_syntax() == 'gcc'
# We support GCC and Clang.

# Additional warnings:

add_project_arguments('-Wundef', language : 'cpp')
add_project_arguments('-Wshadow', language : 'cpp')
add_project_arguments('-Wunused-macros', language : 'cpp')
add_project_arguments('-Wdouble-promotion', language : 'cpp')
add_project_arguments('-Wmissing-declarations', language : 'cpp')
add_project_arguments('-Wold-style-cast', language : 'cpp')
add_project_arguments('-Wzero-as-null-pointer-constant', language : 'cpp')

# Disable warnings that cause too many false positives:

add_project_arguments('-Wno-pedantic', language : 'cpp')
add_project_arguments('-Wno-invalid-offsetof', language : 'cpp')

# Hardware descriptions can contain constants that are not used in the code
# but still useful as documentation.
# The flag exists for both GCC and Clang, but GCC doesn't enable it via -Wall.
# We'll disable it for both, just in case GCC auto-enables it in the future.
add_project_arguments('-Wno-unused-const-variable', language : 'cpp')

endif

# Dependencies
# ============

dep_sdl2 = dependency('SDL2')
dep_sdl2_ttf = dependency('SDL2_ttf')
dep_png = dependency('libpng')
dep_tcl = dependency('tcl', version : '>=8.6.0')
dep_threads = dependency('threads')
dep_zlib = dependency('zlib')

dep_gl = dependency('GL', required : get_option('glrenderer'))
dep_glew = dependency('glew', required : get_option('glrenderer'))

dep_ogg = dependency('ogg', required : get_option('laserdisc'))
dep_theora = dependency('theoradec', required : get_option('laserdisc'))
dep_vorbis = dependency('vorbis', required : get_option('laserdisc'))

if host_machine.system() == 'linux'
dep_alsa = dependency('alsa', required : get_option('alsamidi'))
else
dep_alsa = dependency('', required : false)
endif

# Components
# ==========

components = {
    'CORE':
        true,
    'GL':
        not get_option('glrenderer').disabled()
        and dep_gl.found() and dep_glew.found(),
    'LASERDISC':
        not get_option('laserdisc').disabled()
        and dep_ogg.found() and dep_theora.found() and dep_vorbis.found(),
    'ALSAMIDI':
        not get_option('alsamidi').disabled()
        and dep_alsa.found(),
    }

# TODO: Subset the sources.

conf_components = configuration_data()
enabled_components = []
foreach name, enabled : components
    conf_components.set10('COMPONENT_' + name, enabled)
    if enabled
        enabled_components += name
    endif
endforeach
conf_components.set(
    'BUILD_COMPONENTS', '"' + ' '.join(enabled_components) + '"'
    )
hdr_components = configure_file(
    output : 'components.hh',
    configuration : conf_components
    )

# System Functions
# ================

conf_systemfuncs = configuration_data()
conf_systemfuncs.set10(
    'HAVE_FTRUNCATE',
    compiler.has_function('ftruncate', prefix : '#include <unistd.h>')
    )
if host_machine.system() in ['darwin', 'openbsd']
    mmap_prefix = '\n'.join([
        '#include <sys/types.h>',
        '#include <sys/mman.h>'
        ])
else
    mmap_prefix = '#include <sys/mman.h>'
endif
conf_systemfuncs.set10(
    'HAVE_MMAP',
    compiler.has_function('mmap', prefix : mmap_prefix)
    )
conf_systemfuncs.set10(
    'HAVE_NFTW',
    compiler.has_function('nftw', prefix : '#include <ftw.h>')
    )
conf_systemfuncs.set10(
    'HAVE_POSIX_MEMALIGN',
    compiler.has_function('posix_memalign', prefix : '#include <stdlib.h>')
    )
hdr_systemfuncs = configure_file(
    output : 'systemfuncs.hh',
    configuration : conf_systemfuncs
    )

# Other Generated Headers
# =======================

prog_python = import('python').find_installation('python3')

hdr_version = custom_target(
    'version header',
    output : 'Version.ii',
    input : 'build/version2code.py',
    command : [prog_python, '@INPUT@', '@OUTPUT@'],
    build_always_stale : true,
    )

abs_datadir = get_option('prefix') / get_option('datadir') / 'openmsx'

hdr_config = custom_target(
    'build info header',
    output : 'build-info.hh',
    input : 'build/buildinfo2code.py',
    command : [
        prog_python, '@INPUT@', '@OUTPUT@',
        host_machine.system(),
        host_machine.cpu_family(), # TODO: is cpu() more suitable?
        'devel', # OPENMSX_FLAVOUR
        abs_datadir
        ],
    )

# Targets
# =======

main_exec = executable(
    'openmsx',
    main_sources, sources,
    hdr_version, hdr_config, hdr_components, hdr_systemfuncs,
    install : true,
    implicit_include_directories : false,
    include_directories: incdirs,
    dependencies : [
        dep_alsa, dep_gl, dep_glew, dep_ogg, dep_png, dep_sdl2, dep_sdl2_ttf,
        dep_tcl, dep_theora, dep_threads, dep_vorbis, dep_zlib
        ],
    )

objects = main_exec.extract_objects(sources)

test_exec = executable(
    'unittest',
    test_sources,
    hdr_version, hdr_config, hdr_components, hdr_systemfuncs,
    objects : objects,
    build_by_default : false,
    install : false,
    implicit_include_directories : false,
    include_directories: [incdirs, 'Contrib/catch2'],
    dependencies : [
        dep_alsa, dep_gl, dep_glew, dep_ogg, dep_png, dep_sdl2, dep_sdl2_ttf,
        dep_tcl, dep_theora, dep_threads, dep_vorbis, dep_zlib
        ],
    )

test('combined unit test', test_exec)