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--!A cross-platform build utility based on Lua
--
-- Licensed under the Apache License, Version 2.0 (the "License");
-- you may not use this file except in compliance with the License.
-- You may obtain a copy of the License at
--
-- http://www.apache.org/licenses/LICENSE-2.0
--
-- Unless required by applicable law or agreed to in writing, software
-- distributed under the License is distributed on an "AS IS" BASIS,
-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-- See the License for the specific language governing permissions and
-- limitations under the License.
--
-- Copyright (C) 2015-present, Xmake Open Source Community.
--
-- @author ruki
-- @file cxxfeatures.lua
--
-- imports
import("core.tools.gcc.cxxfeatures")
-- set features
function _set(feature, condition)
_g.features[feature] = condition
end
-- get features
--
-- @see http://clang.llvm.org/cxx_status.html
--
-- porting from Modules/Compiler/Clang-CXX-FeatureTests.cmake
--
function main()
-- init features
_g.features = cxxfeatures()
-- init conditions
-- clang -x c++ -std=c++20 -dM -E - < /dev/null | grep __cplusplus
local clang_minver = "((__clang_major__ * 100) + __clang_minor__) >= 301"
local clang80_cxx20 = "((__clang_major__ * 100) + __clang_minor__) >= 800 && __cplusplus >= 202002L"
local clang50_cxx17 = "((__clang_major__ * 100) + __clang_minor__) >= 500 && __cplusplus >= 201703L"
local clang34_cxx14 = "((__clang_major__ * 100) + __clang_minor__) >= 304 && __cplusplus > 201103L"
local clang31_cxx11 = clang_minver .. " && __cplusplus >= 201103L"
local clang29_cxx11 = clang_minver .. " && __cplusplus >= 201103L"
local clang_cxx98 = clang_minver .. " && __cplusplus >= 199711L"
-- set language standard supports
_set("cxx_std_98", clang_cxx98)
_set("cxx_std_11", clang29_cxx11)
_set("cxx_std_14", clang34_cxx14)
_set("cxx_std_17", clang50_cxx17)
_set("cxx_std_20", clang80_cxx20)
-- set features for __has_feature()
local features_of_has_feature =
{
"cxx_alias_templates"
, "cxx_alignas"
, "cxx_attributes"
, "cxx_auto_type"
, "cxx_binary_literals"
, "cxx_constexpr"
, "cxx_contextual_conversions"
, "cxx_decltype"
, "cxx_default_function_template_args"
, "cxx_defaulted_functions"
, "cxx_delegating_constructors"
, "cxx_deleted_functions"
, "cxx_explicit_conversions"
, "cxx_generalized_initializers"
, "cxx_inheriting_constructors"
, "cxx_lambdas"
, "cxx_local_type_template_args"
, "cxx_noexcept"
, "cxx_nonstatic_member_init"
, "cxx_nullptr"
, "cxx_range_for"
, "cxx_raw_string_literals"
, "cxx_reference_qualified_functions"
, "cxx_relaxed_constexpr"
, "cxx_return_type_deduction"
, "cxx_rvalue_references"
, "cxx_static_assert"
, "cxx_strong_enums"
, "cxx_thread_local"
, "cxx_unicode_literals"
, "cxx_unrestricted_unions"
, "cxx_user_literals"
, "cxx_variable_templates"
, "cxx_variadic_templates"
, {"cxx_aggregate_default_initializers", "cxx_aggregate_nsdmi" }
, {"cxx_trailing_return_types", "cxx_trailing_return" }
, {"cxx_alignof", "cxx_alignas" }
, {"cxx_final", "cxx_override_control" }
, {"cxx_override", "cxx_override_control" }
, {"cxx_uniform_initialization", "cxx_generalized_initializers" }
, {"cxx_defaulted_move_initializers", "cxx_defaulted_functions" }
, {"cxx_lambda_init_captures", "cxx_init_captures" }
}
for _, feature in ipairs(features_of_has_feature) do
local name = feature
local test = feature
if type(feature) == "table" then
name = feature[1]
test = feature[2]
end
_set(name, clang_minver .. " && __has_feature(" .. test .. ")")
end
-- set features
_set("cxx_attribute_deprecated", clang34_cxx14) -- http://llvm.org/bugs/show_bug.cgi?id=19242
_set("cxx_decltype_auto", clang34_cxx14) -- http://llvm.org/bugs/show_bug.cgi?id=19698
_set("cxx_digit_separators", clang34_cxx14)
_set("cxx_generic_lambdas", clang34_cxx14) -- http://llvm.org/bugs/show_bug.cgi?id=19674
_set("cxx_enum_forward_declarations", clang31_cxx11)
_set("cxx_sizeof_member", clang31_cxx11)
_set("cxx_extended_friend_declarations", clang29_cxx11)
_set("cxx_extern_templates", clang29_cxx11)
_set("cxx_func_identifier", clang29_cxx11)
_set("cxx_inline_namespaces", clang29_cxx11)
_set("cxx_long_long_type", clang29_cxx11)
_set("cxx_right_angle_brackets", clang29_cxx11)
_set("cxx_variadic_macros", clang29_cxx11)
_set("cxx_template_template_parameters", clang_cxx98)
-- get features
return _g.features
end
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