58 lines
2.4 KiB
Plaintext
58 lines
2.4 KiB
Plaintext
# Copyright 2022 The Pigweed Authors
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may not
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# use this file except in compliance with the License. You may obtain a copy of
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# the License at
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#
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# https://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations under
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# the License.
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# Constants that represent the different C++ standards. These are set to the
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# value of __cplusplus, which allows for unambiguous numeric comparison of C++
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# standards.
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pw_toolchain_STANDARD = {
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CXX98 = 199711
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CXX11 = 201103
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CXX14 = 201402
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CXX17 = 201703
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CXX20 = 202002
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}
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if (defined(is_fuchsia_tree) && is_fuchsia_tree) {
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# In the Fuchsia build, this must align with how code is actually being
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# compiled in that build, which is controlled by Fuchsia's build argument.
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import("//build/config/fuchsia_cxx_version.gni")
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# This is not a GN build argument at all when Pigweed is integrated into the
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# Fuchsia build, just a reflection of the Fuchsia build's configuration.
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# **NOTE:** This line will blow up if the value isn't one of the supported
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# ones listed above.
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pw_toolchain_CXX_STANDARD = pw_toolchain_STANDARD["CXX$fuchsia_cxx_version"]
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} else {
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declare_args() {
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# Specifies the C++ standard this toolchain is compiling for. The value
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# must be an integer that matches the value of the __cplusplus macro when
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# compiling with that standard. Use the pw_toolchain_CXX_STANDARD_##
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# constants to set this value.
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pw_toolchain_CXX_STANDARD = pw_toolchain_STANDARD.CXX17
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}
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}
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assert(
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pw_toolchain_CXX_STANDARD == pw_toolchain_STANDARD.CXX98 ||
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pw_toolchain_CXX_STANDARD == pw_toolchain_STANDARD.CXX11 ||
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pw_toolchain_CXX_STANDARD == pw_toolchain_STANDARD.CXX14 ||
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pw_toolchain_CXX_STANDARD == pw_toolchain_STANDARD.CXX17 ||
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pw_toolchain_CXX_STANDARD == pw_toolchain_STANDARD.CXX20,
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"pw_toolchain_CXX_STANDARD ($pw_toolchain_CXX_STANDARD) is an " +
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"unsupported value. The toolchain must set it to one of the " +
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"pw_toolchain_STANDARD constants (e.g. pw_toolchain_STANDARD.CXX17).")
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assert(pw_toolchain_CXX_STANDARD >= pw_toolchain_STANDARD.CXX14,
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"Pigweed requires at least C++14.")
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