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NVCC + C++17 #1103

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Sep 22, 2021
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NVCC + C++17 #1103

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e6c7e1c
NVCC + C++17
ax3l Sep 15, 2021
284512c
NVCC 11.0.2 C++17 work-around: Add Comment
ax3l Sep 15, 2021
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NVCC + C++17 
Work-around a build issue with NVCC in C++17 builds.
```
include/openPMD/backend/Attributable.hpp(437):
error #289: no instance of constructor "openPMD::Attribute::Attribute" matches the argument list
            argument types are: (std::__cxx11::string)
          detected during instantiation of "__nv_bool openPMD::AttributableInterface::setAttribute(const std::__cxx11::string &, T) [with T=std::__cxx11::string]"
```
from
```
inline bool
AttributableInterface::setAttribute( std::string const & key, char const value[] )
{
    return this->setAttribute(key, std::string(value));
}
```

Seen with:
- NVCC 11.0.2 + GCC 8.3.0
- NVCC 11.0.2 + GCC 7.5.0
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@ax3l
ax3l committed Sep 15, 2021
commit e6c7e1cb4d03aa117675622927a5be94c007d110
3 changes: 2 additions & 1 deletion include/openPMD/backend/Attributable.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -434,7 +434,8 @@ AttributableInterface::setAttribute( std::string const & key, T value )
&& !attri.m_attributes.key_comp()(key, it->first) )
{
// key already exists in map, just replace the value
it->second = Attribute(value);
Attribute::resource val(value);
it->second = Attribute(std::move(val));
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@ax3l ax3l Sep 15, 2021 •
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Just FYI, this triggers the same issue:

Suggested change
Attribute::resource val(value);
it->second = Attribute(std::move(val));
it->second = Attribute(std::move(value));

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@franzpoeschel franzpoeschel Sep 15, 2021 •
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Could you test if this one works:

Attribute::resource val(std::move(value));
it->second = Attribute(std::move(vale));

or even:

it->second = Attribute(Attribute::resource(std::move(value)));

That way would at least be without copying

Also, let's put a comment there to make it clear that this is purposefully strange

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Good idea. I have no access to Cori due to maintenance today and will test it tomorrow.

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Tested it now, the explicit construction of the resource in place works as a work-around, too :)
Added also a comment :)

return true;
} else
{
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