Abseil Common Libraries (C++) (grcp 依赖)
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100 lines
3.6 KiB
100 lines
3.6 KiB
7 years ago
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// Copyright 2017 The Abseil Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://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,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// -----------------------------------------------------------------------------
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// File: policy_checks.h
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// -----------------------------------------------------------------------------
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//
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// This header enforces a minimum set of policies at build time, such as the
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// supported compiler and library versions. Unsupported configurations are
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// reported with `#error`. This enforcement is best effort, so successfully
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// compiling this header does not guarantee a supported configuration.
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#ifndef ABSL_BASE_POLICY_CHECKS_H_
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#define ABSL_BASE_POLICY_CHECKS_H_
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// Included for the __GLIBC_PREREQ macro used below.
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#include <limits.h>
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// Included for the _STLPORT_VERSION macro used below.
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#if defined(__cplusplus)
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#include <cstddef>
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#endif
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// -----------------------------------------------------------------------------
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// Operating System Check
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// -----------------------------------------------------------------------------
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#if defined(__CYGWIN__)
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#error "Cygwin is not supported."
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#endif
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// -----------------------------------------------------------------------------
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// Compiler Check
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// -----------------------------------------------------------------------------
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// We support MSVC++ 14.0 update 2 and later.
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// This minimum will go up.
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#if defined(_MSC_FULL_VER) && _MSC_FULL_VER < 190023918
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#error "This package requires Visual Studio 2015 Update 2 or higher"
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#endif
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// We support gcc 4.7 and later.
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// This minimum will go up.
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#if defined(__GNUC__) && !defined(__clang__)
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#if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 7)
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#error "This package requires gcc 4.7 or higher"
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#endif
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#endif
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// We support Apple Xcode clang 4.2.1 (version 421.11.65) and later.
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// This corresponds to Apple Xcode version 4.5.
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// This minimum will go up.
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#if defined(__apple_build_version__) && __apple_build_version__ < 4211165
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#error "This package requires __apple_build_version__ of 4211165 or higher"
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#endif
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// -----------------------------------------------------------------------------
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// C++ Version Check
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// -----------------------------------------------------------------------------
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// Enforce C++11 as the minimum. Note that Visual Studio has not
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// advanced __cplusplus despite being good enough for our purposes, so
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// so we exempt it from the check.
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#if defined(__cplusplus) && !defined(_MSC_VER)
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#if __cplusplus < 201103L
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#error "C++ versions less than C++11 are not supported."
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#endif
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#endif
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// -----------------------------------------------------------------------------
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// Standard Library Check
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// -----------------------------------------------------------------------------
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// We have chosen glibc 2.12 as the minimum as it was tagged for release
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// in May, 2010 and includes some functionality used in Google software
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// (for instance pthread_setname_np):
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// https://sourceware.org/ml/libc-alpha/2010-05/msg00000.html
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#ifdef __GLIBC_PREREQ
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#if !__GLIBC_PREREQ(2, 12)
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#error "Minimum required version of glibc is 2.12."
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#endif
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#endif
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#if defined(_STLPORT_VERSION)
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#error "STLPort is not supported."
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#endif
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#endif // ABSL_BASE_POLICY_CHECKS_H_
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