1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 // Define macros to indicate C++ standard / platform / etc we use. 18 19 #ifndef LIBTEXTCLASSIFIER_UTIL_BASE_CONFIG_H_ 20 #define LIBTEXTCLASSIFIER_UTIL_BASE_CONFIG_H_ 21 22 namespace libtextclassifier { 23 24 // Define LANG_CXX11 to 1 if current compiler supports C++11. 25 // 26 // GXX_EXPERIMENTAL_CXX0X is defined by gcc and clang up to at least 27 // gcc-4.7 and clang-3.1 (2011-12-13). __cplusplus was defined to 1 28 // in gcc before 4.7 (Crosstool 16) and clang before 3.1, but is 29 // defined according to the language version in effect thereafter. 30 // Microsoft Visual Studio 14 (2015) sets __cplusplus==199711 despite 31 // reasonably good C++11 support, so we set LANG_CXX for it and 32 // newer versions (_MSC_VER >= 1900). 33 #if (defined(__GXX_EXPERIMENTAL_CXX0X__) || __cplusplus >= 201103L || \ 34 (defined(_MSC_VER) && _MSC_VER >= 1900)) 35 // Define this to 1 if the code is compiled in C++11 mode; leave it 36 // undefined otherwise. Do NOT define it to 0 -- that causes 37 // '#ifdef LANG_CXX11' to behave differently from '#if LANG_CXX11'. 38 #define LANG_CXX11 1 39 #endif 40 41 } // namespace libtextclassifier 42 43 #endif // LIBTEXTCLASSIFIER_UTIL_BASE_CONFIG_H_ 44