fe0ac89500
also: - build/infra improvements - updated submodules - updated conformance tests - misc code review/refactors - library version bump - TOML version bump
517 lines
14 KiB
Meson
517 lines
14 KiB
Meson
project(
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'tomlplusplus',
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'cpp',
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version : '2.2.0',
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meson_version : '>=0.53.0',
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license : 'MIT',
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default_options : [
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# core options
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'buildtype=release',
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'warning_level=3',
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'werror=true',
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'layout=flat',
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# base options
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'b_lto=true',
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'b_ndebug=if-release',
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# compiler options
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'cpp_std=c++17'
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]
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)
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#######################################################################################################################
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# compiler management
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#######################################################################################################################
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compiler = meson.get_compiler('cpp')
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message(['target cpu_family', host_machine.cpu_family()])
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message(['target cpu', host_machine.cpu()])
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message(['target system', host_machine.system()])
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message(['target endian', host_machine.endian()])
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is_gcc = compiler.get_id() == 'gcc'
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is_clang = compiler.get_id() == 'clang'
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is_msvc = compiler.get_id() == 'msvc'
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is_icc_cl = compiler.get_id() == 'intel-cl'
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is_icc = is_icc_cl or compiler.get_id() == 'intel'
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is_lld = compiler.get_linker_id() == 'ld.lld'
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is_debug = get_option('debug')
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is_release = not is_debug
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is_pedantic = get_option('pedantic')
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is_windows = host_machine.system() == 'windows'
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is_x64 = host_machine.cpu_family() == 'x86_64'
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is_subproject = meson.is_subproject()
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has_exceptions = get_option('cpp_eh') != 'none'
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include_dirs = include_directories('include', 'extern')
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overrides = []
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additional_arguments = []
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message(['is_release', is_release])
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message(['is_windows', is_windows])
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message(['is_x64', is_x64])
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# compiler argument references:
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# msvc: https://docs.microsoft.com/en-us/cpp/build/reference/compiler-options-listed-alphabetically?view=vs-2019
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# intel and intel-cl: https://software.intel.com/content/www/us/en/develop/documentation/cpp-compiler-oneapi-dev-guide-and-reference/top/compiler-reference/compiler-options/alphabetical-list-of-compiler-options.html
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# gcc:
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# clang:
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# GCC or Clang
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if is_gcc or is_clang
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add_project_arguments(
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'-march=native',
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language : 'cpp'
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)
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if is_release
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add_project_arguments(
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'-fdata-sections',
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'-ffunction-sections',
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'-Wl,--gc-sections',
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'-Wl,-s',
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language : 'cpp'
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)
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endif
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endif
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# GCC
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if is_gcc
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add_project_arguments(
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'-fmax-errors=5',
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'-Wno-init-list-lifetime',
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language : 'cpp'
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)
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if is_pedantic
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add_project_arguments(
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'-Wcast-align',
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'-Wcast-qual',
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'-Wctor-dtor-privacy',
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'-Wdisabled-optimization',
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'-Wextra',
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'-Wfloat-equal',
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'-Wimport',
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'-Winit-self',
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'-Wlogical-op',
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'-Wmissing-declarations',
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'-Wmissing-field-initializers',
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'-Wmissing-format-attribute',
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'-Wmissing-include-dirs',
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'-Wmissing-noreturn',
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'-Wnoexcept',
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'-Wold-style-cast',
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'-Woverloaded-virtual',
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'-Wpacked',
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'-Wpadded',
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'-Wpedantic',
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'-Wpointer-arith',
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'-Wredundant-decls',
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'-Wshadow',
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'-Wsign-conversion',
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'-Wsign-promo',
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'-Wstack-protector',
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'-Wstrict-null-sentinel',
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'-Wswitch-default',
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'-Wswitch-enum',
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'-Wundef',
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'-Wunreachable-code',
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'-Wunused',
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'-Wunused-parameter',
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'-Wvariadic-macros',
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'-Wwrite-strings',
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'-Wmissing-noreturn',
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'-Wsuggest-attribute=const',
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'-Wsuggest-attribute=pure',
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language : 'cpp'
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)
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endif
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if is_release
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add_project_arguments(
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'-fmerge-constants',
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language : 'cpp'
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)
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endif
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endif
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# Clang
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if is_clang
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if is_pedantic
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add_project_arguments('-Weverything', language : 'cpp')
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endif
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add_project_arguments(
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'-ferror-limit=5',
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'-Wno-unused-command-line-argument',
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# flags from here down are disabling stupidly pedantic warnings that only appear with -Weverything
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'-Wno-c++98-compat',
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'-Wno-c++98-compat-pedantic',
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'-Wno-documentation',
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'-Wno-documentation-unknown-command',
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'-Wno-switch-enum',
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'-Wno-covered-switch-default',
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language : 'cpp'
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)
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if get_option('time_trace')
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add_project_arguments('-ftime-trace', language : 'cpp')
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endif
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if is_release
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add_project_arguments(
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'-Oz',
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'-fmerge-all-constants',
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language : 'cpp'
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)
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endif
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endif
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# MSVC or icc-cl
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if is_msvc or is_icc_cl
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add_project_arguments(
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'/bigobj',
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'/fp:except-', # disable floating-point exceptions
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'/Gy', # function-level linking
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'/GF', # string pooling
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'/openmp-',
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'/permissive-',
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'/sdl-',
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'/utf-8',
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'/volatile:iso',
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'/Zc:__cplusplus',
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'/Zc:inline',
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'/Zc:throwingNew',
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'/Zi', # generate debug info (doesn't affect optimization)
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language : 'cpp'
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)
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add_project_link_arguments('/DEBUG', language : 'cpp') # generate PDB (doesn't affect optimization)
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if is_release
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add_project_arguments(
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'/GL', # whole program optimization
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'/Gw', # Optimize Global Data
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'/Ob3', # aggressive inlining
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'/Oy', # omit frame pointers
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'/Oi', # generate intrinsics
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language : 'cpp'
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)
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add_project_link_arguments('/ltcg', language : 'cpp')
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endif
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if is_pedantic
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add_project_arguments('/W4', language : 'cpp')
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endif
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if is_x64
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add_project_arguments('/arch:AVX', language : 'cpp')
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endif
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endif
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# icc-cl
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if is_icc_cl
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add_project_arguments(
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'/wd82', # storage class is not first
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'/wd177', # unreferenced var
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'/wd280', # selector expression is constant (why the fuck is that a warning?)
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'/wd411', # class provides no constructor (duh, it's an aggregate)
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'/wd869', # parameter "blah" was never referenced
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'/wd1011', # missing return statement (false negative)
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'/wd1628', # function marked [[noreturn]] returns (false positive)
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'/wd2261', # assume with side effects discarded
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'/wd2557', # mismatched sign compare
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'/wd3280', # declaration hides member (triggered in Catch2)
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language : 'cpp'
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)
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endif
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# icc (any)
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if is_icc
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add_project_arguments(
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'/Qdiag-error-limit:5',
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'/Qoption,cpp,--unicode_source_kind,UTF-8',
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'/D__builtin_bit_cast(T, v)=([&]()noexcept{ T val; memcpy(&val, &v, sizeof(T)); return val; })()', # __builtin_bit_cast workaround
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language : 'cpp'
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)
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endif
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# windows stuff
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if is_windows
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add_project_arguments(
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'-D_ITERATOR_DEBUG_LEVEL=0',
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'-D_WINSOCK_DEPRECATED_NO_WARNINGS',
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'-D_SCL_SECURE_NO_WARNINGS',
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'-D_CRT_SECURE_NO_WARNINGS',
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language : 'cpp'
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)
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add_project_arguments(has_exceptions ? '-D_HAS_EXCEPTIONS=1' : '-D_HAS_EXCEPTIONS=0', language : 'cpp')
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elif is_release
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overrides += 'strip=true'
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endif
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# LTO
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if is_lld or is_debug
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overrides += 'b_lto=false'
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endif
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#######################################################################################################################
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# c++ 20 check
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# (used by tests)
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#######################################################################################################################
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compiler_supports_cpp20_args = []
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if is_gcc or is_clang
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compiler_supports_cpp20_args += '-std=c++2a'
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elif is_icc
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compiler_supports_cpp20_args += '/Qstd=c++2a'
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elif is_msvc
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compiler_supports_cpp20_args += '/std:c++latest'
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endif
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compiler_supports_cpp20 = compiler_supports_cpp20_args.length() > 0 and compiler.links('''
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#include <version>
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#include <string>
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#include <iostream>
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int main()
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{
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std::string s = "kek";
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std::cout << s << std::endl;
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return 0;
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}
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''',
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name : 'supports c++20',
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args : compiler_supports_cpp20_args
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)
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#######################################################################################################################
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# char8_t check
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# (used by tests)
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#######################################################################################################################
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compiler_supports_char8_args = []
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if is_gcc or is_clang
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compiler_supports_char8_args += '-fchar8_t'
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endif
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compiler_supports_char8_args_private = []
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compiler_supports_char8_args_private += compiler_supports_cpp20_args
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compiler_supports_char8_args_private += compiler_supports_char8_args
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compiler_supports_char8 = compiler_supports_cpp20 and compiler.links('''
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#include <version>
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#include <string_view>
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#include <string>
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#include <type_traits>
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using namespace std::string_view_literals;
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#ifndef __cpp_lib_char8_t
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#error oh noes
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#endif
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static_assert(!std::is_same_v<char, char8_t>);
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static_assert(!std::is_same_v<std::string, std::u8string>);
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std::u8string func()
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{
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return std::u8string{ u8"this is a test."sv };
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}
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int main()
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{
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return 0;
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}
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''',
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name : 'supports char8_t',
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args : compiler_supports_char8_args_private
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)
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#######################################################################################################################
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# consteval check
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# (this doesn't inform the build in any way; it's just so i can see who supports it)
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#######################################################################################################################
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compiler_supports_consteval = compiler_supports_cpp20 and compiler.compiles('''
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consteval int test() noexcept
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{
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return 42;
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}
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int main()
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{
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constexpr auto val = test(); // test() should be compiletime-callable
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return val;
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}
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''',
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name : 'supports consteval keyword',
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args : compiler_supports_cpp20_args
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)
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#######################################################################################################################
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# __fp16 and _Float16 checks
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#######################################################################################################################
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float_16_preprocessor_single_check_template = '''
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#ifndef @0@
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#error @0@ wasn't defined!
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#else
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#pragma message("@0@: " MAKE_STRING(@0@))
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#endif
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#if @0@ != @1@
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#error @0@ was not @1@!
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#endif
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'''
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float_16_preprocessor_checks = '''
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#define MAKE_STRING(s) MAKE_STRING_1(s)
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#define MAKE_STRING_1(s) #s
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''' + float_16_preprocessor_single_check_template.format('__FLT_RADIX__', '2') \
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+ float_16_preprocessor_single_check_template.format('__FLT16_MANT_DIG__', '11') \
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+ float_16_preprocessor_single_check_template.format('__FLT16_DIG__', '3') \
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+ float_16_preprocessor_single_check_template.format('__FLT16_MIN_EXP__', '-13') \
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+ float_16_preprocessor_single_check_template.format('__FLT16_MIN_10_EXP__', '-4') \
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+ float_16_preprocessor_single_check_template.format('__FLT16_MAX_EXP__', '16') \
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+ float_16_preprocessor_single_check_template.format('__FLT16_MAX_10_EXP__', '4')
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compiler_supports_float16_args = []
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if is_gcc
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compiler_supports_float16_args += '-mfp16-format=ieee'
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endif
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compiler_supports_fp16 = compiler.links('''
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int main()
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{
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static_assert(sizeof(__fp16) == 2);
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__fp16 f = static_cast<__fp16>(1);
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const auto f2 = static_cast<float>(f);
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const auto f3 = static_cast<__fp16>(0.2L);
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return 0;
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}
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''',
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name : 'supports __fp16',
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args : compiler_supports_float16_args
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)
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compiler_supports_float16 = compiler.links('''
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@0@
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int main()
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{
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static_assert(sizeof(_Float16) == 2);
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_Float16 f = static_cast<_Float16>(1);
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const auto f2 = static_cast<float>(f);
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const auto f3 = static_cast<_Float16>(0.2L);
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return 0;
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}
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'''.format(float_16_preprocessor_checks),
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name : 'supports _Float16',
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args : compiler_supports_float16_args
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)
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if compiler_supports_fp16 or compiler_supports_float16
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additional_arguments += compiler_supports_float16_args
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endif
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#######################################################################################################################
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# int128 check
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#######################################################################################################################
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compiler_supports_int128 = compiler.links('''
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#ifndef __SIZEOF_INT128__
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#error __SIZEOF_INT128__ wasn't defined!
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#endif
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#include <cstdint>
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int main()
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{
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static_assert(__SIZEOF_INT128__ == 16);
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static_assert(sizeof(__int128_t) == 16);
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static_assert(sizeof(__uint128_t) == 16);
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__int128_t i = static_cast<__int128_t>(1);
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const auto i2 = static_cast<int64_t>(i);
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const auto i3 = static_cast<int32_t>(i);
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return 0;
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}
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''',
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name : 'supports __int128_t'
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)
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#######################################################################################################################
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# float128 check
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#######################################################################################################################
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compiler_supports_float128 = compiler.links('''
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#ifndef __SIZEOF_FLOAT128__
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#error __SIZEOF_FLOAT128__ wasn't defined!
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#endif
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#ifndef __FLT128_MANT_DIG__
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#error __FLT128_MANT_DIG__ wasn't defined!
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#endif
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#ifndef __LDBL_MANT_DIG__
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#error __LDBL_MANT_DIG__ wasn't defined!
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#endif
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#if __FLT128_MANT_DIG__ <= __LDBL_MANT_DIG__
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#error __FLT128_MANT_DIG__ was <= __LDBL_MANT_DIG__
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#endif
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int main()
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{
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static_assert(__SIZEOF_FLOAT128__ == 16);
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static_assert(sizeof(__float128) == 16);
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__float128 f = static_cast<__float128>(1);
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const auto f2 = static_cast<long double>(f);
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const auto f3 = static_cast<double>(f);
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return 0;
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}
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''',
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name : 'supports __float128'
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)
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if compiler_supports_float16 or compiler_supports_int128 or compiler_supports_float128
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if is_gcc
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additional_arguments += '-fext-numeric-literals'
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endif
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endif
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#######################################################################################################################
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# subdirectories
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#######################################################################################################################
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build_tests = get_option('build_tests') and not is_subproject
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if build_tests
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run_command('git', 'submodule', 'update', '--init', 'extern/Catch2')
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run_command('git', 'submodule', 'update', '--init', 'extern/tloptional')
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subdir('tests')
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endif
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build_examples = get_option('build_examples') and not is_subproject
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if build_examples
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subdir('examples')
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endif
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install_subdir('include/toml++',
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strip_directory: true,
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install_dir: 'include/toml++'
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)
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#######################################################################################################################
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# dependencies, cmake etc.
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#######################################################################################################################
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tomlplusplus_dep = declare_dependency(
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include_directories : include_directories('include'),
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version : meson.project_version(),
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)
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pkgc = import('pkgconfig')
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pkgc.generate(
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name: meson.project_name(),
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version: meson.project_version(),
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description: 'Header-only TOML config file parser and serializer for modern C++',
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install_dir: join_paths(get_option('datadir'), 'pkgconfig'),
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)
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# cmake
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if get_option('generate_cmake_config') and not is_subproject
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cmake = import('cmake')
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cmake.write_basic_package_version_file(
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name: meson.project_name(),
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version: meson.project_version(),
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install_dir: join_paths('lib', 'cmake', meson.project_name()),
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)
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cmake_conf = configuration_data()
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cmake.configure_package_config_file(
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name: meson.project_name(),
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input: 'cmake/tomlplusplus.cmake.in',
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configuration: cmake_conf,
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install_dir: join_paths('lib', 'cmake', meson.project_name()),
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)
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endif
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