meson.build

project(
    'stdplus',
    'cpp',
    version: '0.1',
    meson_version: '>=1.1.1',
    default_options: [
        'warning_level=3',
        'cpp_std=c++23',
        'tests=' + (meson.is_subproject() ? 'disabled' : 'auto'),
        'examples=' + (meson.is_subproject() ? 'false' : 'true'),
    ],
)

has_dl = false
if not get_option('dl').disabled()
    dl_dep = meson.get_compiler('cpp').find_library('dl', required: false)
    has_dl = meson.get_compiler('cpp').links(
        '''
    #include <dlfcn.h>
    int main() { dlopen("", 0); }
  ''',
        dependencies: dl_dep,
    )
endif
if get_option('dl').enabled() and not has_dl
    error('libdl support required')
endif

has_fd = false
if not get_option('fd').disabled()
    has_fd = true
endif

has_io_uring = false
if not get_option('io_uring').disabled() and has_fd
    io_uring_dep = dependency('liburing', required: get_option('io_uring'))
    if io_uring_dep.found()
        has_io_uring = true
    endif
endif
if get_option('io_uring').enabled() and not has_io_uring
    error('io_uring support is required')
endif

build_tests = get_option('tests')
has_gtest = false
if not build_tests.disabled() or not get_option('gtest').disabled()
    gtest_dep = dependency('gtest', required: false)
    gtest_main_dep = dependency('gtest', main: true, required: false)
    gmock_dep = dependency('gmock', required: false)
    if not gtest_dep.found() or not gmock_dep.found()
        gtest_opts = import('cmake').subproject_options()
        gtest_opts.add_cmake_defines(
            {'BUILD_SHARED_LIBS': 'ON', 'CMAKE_CXX_FLAGS': '-Wno-pedantic'},
        )
        gtest_proj = import('cmake').subproject(
            'googletest',
            options: gtest_opts,
            required: false,
        )
        if gtest_proj.found()
            gtest_dep = declare_dependency(
                dependencies: [
                    dependency('threads'),
                    gtest_proj.dependency('gtest'),
                ],
            )
            gtest_main_dep = declare_dependency(
                dependencies: [gtest_dep, gtest_proj.dependency('gtest_main')],
            )
            gmock_dep = gtest_proj.dependency('gmock')
        else
            assert(
                not build_tests.enabled() and not get_option('gtest').enabled(),
                'Googletest is required',
            )
        endif
    endif
    if not get_option('gtest').disabled() and gtest_dep.found()
        has_gtest = true
    endif
endif

subdir('include')
if has_dl
    subdir('include-dl')
endif
if has_fd
    subdir('include-fd')
endif
if has_io_uring
    subdir('include-uring')
endif
if has_gtest
    subdir('include-gtest')
endif

subdir('src')

build_examples = get_option('examples')

if build_examples
    subdir('example')
endif
if not build_tests.disabled()
    subdir('test')
endif