Comments (9)
I think we do need to include nvcc.hpp to set up the device/host macros, but disable the nvcc specific macros when clang is being used. There are actually 3 use cases:
- Clang is doing everything.
- NVCC is calling clang as the host compiler and/or preprocessor.
- It really is NVCC.
I assume that (2) still need the workarounds (in which case Boost.Optional may still be broken if it's behaving differently for clang), but I don't have a CUDO setup here to test on any more.
If we encase the block:
// A bug in version 7.0 of CUDA prevents use of variadic templates in some occasions
// https://svn.boost.org/trac/boost/ticket/11897
// This is fixed in 7.5. As the following version macro was introduced in 7.5 an existance
// check is enough to detect versions < 7.5
#if BOOST_CUDA_VERSION < 7050000
# define BOOST_NO_CXX11_VARIADIC_TEMPLATES
#endif
// The same bug is back again in 8.0:
#if (BOOST_CUDA_VERSION > 8000000) && (BOOST_CUDA_VERSION < 8010000)
# define BOOST_NO_CXX11_VARIADIC_TEMPLATES
#endif
// CUDA (8.0) has no constexpr support in msvc mode:
#if defined(_MSC_VER) && (BOOST_CUDA_VERSION < 9000000)
# define BOOST_NO_CXX11_CONSTEXPR
#endif
In a
# !defined(__clang__) || defined(__NVCC__)
block, does that fix things for you?
from config.
Yes, that would indeed fix it!
(Note: Coming back to this I initially had some trouble to replicate the bug with the snippet I provided above, as variadic templates require compilation with std=c++11
or newer - which I forgot).
from config.
I just ran into this as well, because BOOST_METAPARSE_STRING
fails to compile with clang in CUDA mode: https://cuda.godbolt.org/z/nzsGEGTn9
The reason is again because BOOST_NO_CXX11_VARIADIC_TEMPLATES
is wrongly defined by Boost.Config.
from config.
@jzmaddock If I apply the above mentioned fix then I get compilation errors: boost/type_traits/is_base_and_derived.hpp:142:25: error: invalid application of 'sizeof' to an incomplete type 'boost::in_place_factory_base' BOOST_STATIC_ASSERT(sizeof(B) != 0);
. This might be more involved to fix.
from config.
What compile line are you using with clang, for some reason MSys-mingw/clang-11 and
clang -x cuda --cuda-gpu-arch=sm_75 -std=c++14 -I. -nocudalib -nocudainc t.cu
does NOT set __CUDACC__
which is required to trigger the issue.
from config.
Ah, -nocudainc is the issue, but without that I get other issues.
from config.
OK reproduced on Ubuntu with clang-11 and CUDA 11 SDK. The above fix addresses the original issue so this one is closing down now.
@bernhardmgruber : your issue indicates that something has forward declared boost::in_place_factory_base and then used it in is_base_of: this is indeed an error, and should be so. You will need to provide more information in a separate issue though as I'm unable to reproduce with current develop and either clang-10 or 11 and CUDA 11. You could try including boost/utlity/in_place_factory.hpp at the start of your test file to see if this fixes things? If so then it's a question of tracking down who the culprit is (ie which library is instantiating is_base_of on an incomplete type).
from config.
@bernhardmgruber this should work for you also: https://cuda.godbolt.org/#g:!((g:!((g:!((h:codeEditor,i:(filename:'1',fontScale:14,fontUsePx:'0',j:1,lang:cuda,selection:(endColumn:1,endLineNumber:8,positionColumn:1,positionLineNumber:8,selectionStartColumn:1,selectionStartLineNumber:8,startColumn:1,startLineNumber:8),source:'%23include+%3Cboost/config.hpp%3E%0A%23undef+BOOST_NO_CXX11_VARIADIC_TEMPLATES%0A%23undef+BOOST_NO_VARIADIC_TEMPLATES%0A%0A%0A%23include+%3Cboost/metaparse/string.hpp%3E%0A%0A//+%23if+BOOST_CUDA_VERSION+%3C+7050000%0A//+%23error%0A//+%23endif%0A%0A//+%23if+defined+BOOST_NO_CXX11_VARIADIC_TEMPLATES%0A//+%23error%0A//+%23endif%0A%0A//+static_assert(BOOST_METAPARSE_STD+%3E%3D+2011,+%22%22)%3B%0A%0Ausing+T+%3D+BOOST_METAPARSE_STRING(%22asfd%22)%3B%0A'),l:'5',n:'0',o:'CUDA+C%2B%2B+source+%231',t:'0')),k:40.469973890339425,l:'4',n:'0',o:'',s:0,t:'0'),(g:!((g:!((h:compiler,i:(compiler:cuclang1100,filters:(b:'0',binary:'1',commentOnly:'0',demangle:'0',directives:'0',execute:'1',intel:'0',libraryCode:'0',trim:'1'),flagsViewOpen:'1',fontScale:14,fontUsePx:'0',j:1,lang:cuda,libs:!(),options:'-std%3Dc%2B%2B14+-O3+-I/opt/compiler-explorer/libs/boost_1_77_0/',selection:(endColumn:1,endLineNumber:1,positionColumn:1,positionLineNumber:1,selectionStartColumn:1,selectionStartLineNumber:1,startColumn:1,startLineNumber:1),source:1,tree:'1'),l:'5',n:'0',o:'clang+11.0.0+sm_75+CUDA-10.2+(CUDA+C%2B%2B,+Editor+%231,+Compiler+%231)',t:'0')),k:33.33333333333333,l:'4',m:50,n:'0',o:'',s:0,t:'0'),(g:!((h:output,i:(compiler:1,editor:1,fontScale:14,fontUsePx:'0',tree:'1',wrap:'1'),l:'5',n:'0',o:'Output+of+clang+11.0.0+sm_75+CUDA-10.2+(Compiler+%231)',t:'0')),header:(),l:'4',m:50,n:'0',o:'',s:0,t:'0')),k:59.530026109660575,l:'3',n:'0',o:'',t:'0')),l:'2',n:'0',o:'',t:'0')),version:4
from config.
@jzmaddock thank you! We have something similar in our code now. Unfortunately, the problem persists and now moved to Boost.Format. See: #406.
from config.
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