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include/pybind11/numpy.h: gcc 4.8.4 does not have is_trivially_copyable #3270

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Merged
merged 1 commit into from
Sep 15, 2021
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include/pybind11/numpy.h: gcc 4.8.4 does not have is_trivially_copyable #3270

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2 changes: 1 addition & 1 deletion include/pybind11/numpy.h
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Original file line number Diff line number Diff line change
Expand Up @@ -319,7 +319,7 @@ template <typename T> using remove_all_extents_t = typename array_info<T>::type;

template <typename T> using is_pod_struct = all_of<
std::is_standard_layout<T>, // since we're accessing directly in memory we need a standard layout type
#if defined(__GLIBCXX__) && (__GLIBCXX__ < 20150422 || __GLIBCXX__ == 20150623 || __GLIBCXX__ == 20150626 || __GLIBCXX__ == 20160803)
#if defined(__GLIBCXX__) && (__GLIBCXX__ < 20150422 || __GLIBCXX__ == 20150426 || __GLIBCXX__ == 20150623 || __GLIBCXX__ == 20150626 || __GLIBCXX__ == 20160803)
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Yikes. Disappointed there isn't a better way to query this information.

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+1 but I'll merge this now to get us back to normal.

Question, to maybe do something different later in another PR: would there anything be lost if we simply made this

#if defined(__GLIBCXX__) && __GLIBCXX__ < 20160803

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I think the dates are the release dates, even if they are not sequential?

// libstdc++ < 5 (including versions 4.8.5, 4.9.3 and 4.9.4 which were released after 5)
// don't implement is_trivially_copyable, so approximate it
std::is_trivially_destructible<T>,
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