clangfeatures.h (3351B)
1 /* 2 Copyright 2010-2016, D. E. Shaw Research. 3 All rights reserved. 4 5 Redistribution and use in source and binary forms, with or without 6 modification, are permitted provided that the following conditions are 7 met: 8 9 * Redistributions of source code must retain the above copyright 10 notice, this list of conditions, and the following disclaimer. 11 12 * Redistributions in binary form must reproduce the above copyright 13 notice, this list of conditions, and the following disclaimer in the 14 documentation and/or other materials provided with the distribution. 15 16 * Neither the name of D. E. Shaw Research nor the names of its 17 contributors may be used to endorse or promote products derived from 18 this software without specific prior written permission. 19 20 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 23 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 24 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 25 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 26 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 30 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 #ifndef __clangfeatures_dot_hpp 33 #define __clangfeatures_dot_hpp 34 35 #ifndef R123_USE_X86INTRIN_H 36 #if (defined(__x86_64__)||defined(__i386__)) 37 #define R123_USE_X86INTRIN_H 1 38 #else 39 #define R123_USE_X86INTRIN_H 0 40 #endif 41 #endif 42 43 #ifndef R123_USE_CXX11_UNRESTRICTED_UNIONS 44 #define R123_USE_CXX11_UNRESTRICTED_UNIONS __has_feature(cxx_unrestricted_unions) 45 #endif 46 47 #ifndef R123_USE_CXX11_STATIC_ASSERT 48 #define R123_USE_CXX11_STATIC_ASSERT __has_feature(cxx_static_assert) 49 #endif 50 51 // With clang-3.6, -Wall warns about unused-local-typedefs. 52 // The "obvious" thing to do is to ignore -Wunused-local-typedefs, 53 // but that doesn't work because earlier versions of clang blow 54 // up on an 'unknown warning group'. So we briefly ignore -Wall... 55 // It's tempting to just give up on static assertions in pre-c++11 code. 56 #if !R123_USE_CXX11_STATIC_ASSERT && !defined(R123_STATIC_ASSERT) 57 #define R123_STATIC_ASSERT(expr, msg) \ 58 _Pragma("clang diagnostic push") \ 59 _Pragma("clang diagnostic ignored \"-Wall\"") \ 60 typedef char static_assertion[(!!(expr))*2-1] \ 61 _Pragma("clang diagnostic pop") 62 #endif 63 64 #ifndef R123_USE_CXX11_CONSTEXPR 65 #define R123_USE_CXX11_CONSTEXPR __has_feature(cxx_constexpr) 66 #endif 67 68 #ifndef R123_USE_CXX11_EXPLICIT_CONVERSIONS 69 #define R123_USE_CXX11_EXPLICIT_CONVERSIONS __has_feature(cxx_explicit_conversions) 70 #endif 71 72 // With clang-3.0, the apparently simpler: 73 // #define R123_USE_CXX11_RANDOM __has_include(<random>) 74 // dumps core. 75 #ifndef R123_USE_CXX11_RANDOM 76 #if __cplusplus>=201103L && __has_include(<random>) 77 #define R123_USE_CXX11_RANDOM 1 78 #else 79 #define R123_USE_CXX11_RANDOM 0 80 #endif 81 #endif 82 83 #ifndef R123_USE_CXX11_TYPE_TRAITS 84 #if __cplusplus>=201103L && __has_include(<type_traits>) 85 #define R123_USE_CXX11_TYPE_TRAITS 1 86 #else 87 #define R123_USE_CXX11_TYPE_TRAITS 0 88 #endif 89 #endif 90 91 #include "gccfeatures.h" 92 93 #endif