| 1 | /* |
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| 2 | Copyright Benjamin Worpitz 2018 |
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| 3 | Distributed under the Boost Software License, Version 1.0. |
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| 4 | (See accompanying file LICENSE_1_0.txt or copy at |
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| 5 | http://www.boost.org/LICENSE_1_0.txt) |
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| 6 | */ |
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| 7 | |
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| 8 | #ifndef BOOST_PREDEF_COMPILER_NVCC_H |
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| 9 | #define BOOST_PREDEF_COMPILER_NVCC_H |
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| 10 | |
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| 11 | #include <boost/predef/version_number.h> |
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| 12 | #include <boost/predef/make.h> |
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| 13 | |
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| 14 | /* tag::reference[] |
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| 15 | = `BOOST_COMP_NVCC` |
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| 16 | |
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| 17 | https://en.wikipedia.org/wiki/NVIDIA_CUDA_Compiler[NVCC] compiler. |
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| 18 | Version number available as major, minor, and patch beginning with version 7.5. |
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| 19 | |
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| 20 | [options="header"] |
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| 21 | |=== |
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| 22 | | {predef_symbol} | {predef_version} |
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| 23 | |
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| 24 | | `+__NVCC__+` | {predef_detection} |
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| 25 | |
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| 26 | | `+__CUDACC_VER_MAJOR__+`, `+__CUDACC_VER_MINOR__+`, `+__CUDACC_VER_BUILD__+` | V.R.P |
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| 27 | |=== |
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| 28 | */ // end::reference[] |
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| 29 | |
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| 30 | #define BOOST_COMP_NVCC BOOST_VERSION_NUMBER_NOT_AVAILABLE |
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| 31 | |
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| 32 | #if defined(__NVCC__) |
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| 33 | # if !defined(__CUDACC_VER_MAJOR__) || !defined(__CUDACC_VER_MINOR__) || !defined(__CUDACC_VER_BUILD__) |
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| 34 | # define BOOST_COMP_NVCC_DETECTION BOOST_VERSION_NUMBER_AVAILABLE |
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| 35 | # else |
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| 36 | # define BOOST_COMP_NVCC_DETECTION BOOST_VERSION_NUMBER(__CUDACC_VER_MAJOR__, __CUDACC_VER_MINOR__, __CUDACC_VER_BUILD__) |
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| 37 | # endif |
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| 38 | #endif |
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| 39 | |
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| 40 | #ifdef BOOST_COMP_NVCC_DETECTION |
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| 41 | /* |
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| 42 | Always define BOOST_COMP_NVCC instead of BOOST_COMP_NVCC_EMULATED |
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| 43 | The nvcc compilation process is somewhat special as can be read here: |
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| 44 | https://docs.nvidia.com/cuda/cuda-compiler-driver-nvcc/index.html#cuda-compilation-trajectory |
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| 45 | The nvcc compiler precompiles the input two times. Once for the device code |
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| 46 | being compiled by the cicc device compiler and once for the host code |
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| 47 | compiled by the real host compiler. NVCC uses gcc/clang/msvc/... |
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| 48 | depending on the host compiler being set on the command line. |
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| 49 | |
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| 50 | Predef (as a preprocessor only lib) detects the one doing the preprocessing |
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| 51 | as compiler and expects it to be the one doing the real compilation. |
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| 52 | This is not true for NVCC which is only doing the preprocessing and which |
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| 53 | is using another compiler for parts of its work. So for NVCC it should be |
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| 54 | allowed to set BOOST_COMP_NVCC additionally to the already detected host |
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| 55 | compiler because both is true: It is gcc/clang/... compiling the code, but it |
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| 56 | is also NVCC doing the preprocessing and adding some other quirks you may |
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| 57 | want to detect. |
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| 58 | |
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| 59 | This behavior is similar to what boost config is doing in `select_compiler_config.hpp`. |
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| 60 | There the NVCC detection is not handled as a real compiler (part of the |
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| 61 | #if-#elif) but as additional option before the real compiler. |
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| 62 | */ |
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| 63 | # undef BOOST_COMP_NVCC |
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| 64 | # define BOOST_COMP_NVCC BOOST_COMP_NVCC_DETECTION |
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| 65 | # define BOOST_COMP_NVCC_AVAILABLE |
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| 66 | # include <boost/predef/detail/comp_detected.h> |
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| 67 | #endif |
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| 68 | |
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| 69 | #define BOOST_COMP_NVCC_NAME "NVCC" |
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| 70 | |
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| 71 | #endif |
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| 72 | |
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| 73 | #include <boost/predef/detail/test.h> |
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| 74 | BOOST_PREDEF_DECLARE_TEST(BOOST_COMP_NVCC,BOOST_COMP_NVCC_NAME) |
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| 75 | |
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