2 Copyright Benjamin Worpitz 2018
3 Distributed under the Boost Software License, Version 1.0.
4 (See accompanying file LICENSE_1_0.txt or copy at
5 http://www.boost.org/LICENSE_1_0.txt)
8 #ifndef BOOST_PREDEF_COMPILER_NVCC_H
9 #define BOOST_PREDEF_COMPILER_NVCC_H
11 #include <boost/predef/version_number.h>
12 #include <boost/predef/make.h>
15 [heading `BOOST_COMP_NVCC`]
17 [@https://en.wikipedia.org/wiki/NVIDIA_CUDA_Compiler NVCC] compiler.
18 Version number available as major, minor, and patch beginning with version 7.5.
21 [[__predef_symbol__] [__predef_version__]]
23 [[`__NVCC__`] [__predef_detection__]]
25 [[`__CUDACC_VER_MAJOR__`, `__CUDACC_VER_MINOR__`, `__CUDACC_VER_BUILD__`] [V.R.P]]
29 #define BOOST_COMP_NVCC BOOST_VERSION_NUMBER_NOT_AVAILABLE
32 # if !defined(__CUDACC_VER_MAJOR__) || !defined(__CUDACC_VER_MINOR__) || !defined(__CUDACC_VER_BUILD__)
33 # define BOOST_COMP_NVCC_DETECTION BOOST_VERSION_NUMBER_AVAILABLE
35 # define BOOST_COMP_NVCC_DETECTION BOOST_VERSION_NUMBER(__CUDACC_VER_MAJOR__, __CUDACC_VER_MINOR__, __CUDACC_VER_BUILD__)
39 #ifdef BOOST_COMP_NVCC_DETECTION
41 Always define BOOST_COMP_NVCC instead of BOOST_COMP_NVCC_EMULATED
42 The nvcc compilation process is somewhat special as can be read here:
43 https://docs.nvidia.com/cuda/cuda-compiler-driver-nvcc/index.html#cuda-compilation-trajectory
44 The nvcc compiler precompiles the input two times. Once for the device code
45 being compiled by the cicc device compiler and once for the host code
46 compiled by the real host compiler. NVCC uses gcc/clang/msvc/...
47 depending on the host compiler being set on the command line.
49 Predef (as a preprocessor only lib) detects the one doing the preprocessing
50 as compiler and expects it to be the one doing the real compilation.
51 This is not true for NVCC which is only doing the preprocessing and which
52 is using another compiler for parts of its work. So for NVCC it should be
53 allowed to set BOOST_COMP_NVCC additionally to the already detected host
54 compiler because both is true: It is gcc/clang/... compiling the code, but it
55 is also NVCC doing the preprocessing and adding some other quirks you may
58 This behavior is similar to what boost config is doing in `select_compiler_config.hpp`.
59 There the NVCC detection is not handled as a real compiler (part of the
60 #if-#elif) but as additional option before the real compiler.
62 # undef BOOST_COMP_NVCC
63 # define BOOST_COMP_NVCC BOOST_COMP_NVCC_DETECTION
64 # define BOOST_COMP_NVCC_AVAILABLE
65 # include <boost/predef/detail/comp_detected.h>
68 #define BOOST_COMP_NVCC_NAME "NVCC"
72 #include <boost/predef/detail/test.h>
73 BOOST_PREDEF_DECLARE_TEST(BOOST_COMP_NVCC,BOOST_COMP_NVCC_NAME)