Abseil Common Libraries (C++) (grcp 依赖)
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67 lines
2.4 KiB
67 lines
2.4 KiB
// |
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// Copyright 2019 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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// 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, |
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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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#ifndef ABSL_FLAGS_CONFIG_H_ |
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#define ABSL_FLAGS_CONFIG_H_ |
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// Determine if we should strip string literals from the Flag objects. |
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// By default we strip string literals on mobile platforms. |
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#if !defined(ABSL_FLAGS_STRIP_NAMES) |
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#if defined(__ANDROID__) |
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#define ABSL_FLAGS_STRIP_NAMES 1 |
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#elif defined(__APPLE__) |
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#include <TargetConditionals.h> |
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#if defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE |
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#define ABSL_FLAGS_STRIP_NAMES 1 |
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#elif defined(TARGET_OS_EMBEDDED) && TARGET_OS_EMBEDDED |
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#define ABSL_FLAGS_STRIP_NAMES 1 |
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#endif // TARGET_OS_* |
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#endif |
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#endif // !defined(ABSL_FLAGS_STRIP_NAMES) |
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#if !defined(ABSL_FLAGS_STRIP_NAMES) |
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// If ABSL_FLAGS_STRIP_NAMES wasn't set on the command line or above, |
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// the default is not to strip. |
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#define ABSL_FLAGS_STRIP_NAMES 0 |
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#endif |
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#if !defined(ABSL_FLAGS_STRIP_HELP) |
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// By default, if we strip names, we also strip help. |
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#define ABSL_FLAGS_STRIP_HELP ABSL_FLAGS_STRIP_NAMES |
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#endif |
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// ABSL_FLAGS_INTERNAL_ATOMIC_DOUBLE_WORD macro is used for using atomics with |
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// double words, e.g. absl::Duration. |
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// For reasons in bug https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80878, modern |
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// versions of GCC do not support cmpxchg16b instruction in standard atomics. |
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#ifdef ABSL_FLAGS_INTERNAL_ATOMIC_DOUBLE_WORD |
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#error "ABSL_FLAGS_INTERNAL_ATOMIC_DOUBLE_WORD should not be defined." |
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#elif defined(__clang__) && defined(__x86_64__) && \ |
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defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_16) |
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#define ABSL_FLAGS_INTERNAL_ATOMIC_DOUBLE_WORD 1 |
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#endif |
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// ABSL_FLAGS_INTERNAL_HAS_RTTI macro is used for selecting if we can use RTTI |
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// for flag type identification. |
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#ifdef ABSL_FLAGS_INTERNAL_HAS_RTTI |
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#error ABSL_FLAGS_INTERNAL_HAS_RTTI cannot be directly set |
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#elif !defined(__GNUC__) || defined(__GXX_RTTI) |
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#define ABSL_FLAGS_INTERNAL_HAS_RTTI 1 |
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#endif // !defined(__GNUC__) || defined(__GXX_RTTI) |
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#endif // ABSL_FLAGS_CONFIG_H_
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