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1 /*
2  * Copyright (C) 2018 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_UTILS_BASE_CONFIG_H_
20 #define LIBTEXTCLASSIFIER_UTILS_BASE_CONFIG_H_
21 
22 namespace libtextclassifier3 {
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 libtextclassifier3
42 
43 #endif  // LIBTEXTCLASSIFIER_UTILS_BASE_CONFIG_H_
44