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Limiting pragma for ignoring GCC 7 -Wnoexcept-type to the scope of pybind11.h. (#3161)

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* Moving pragma for ignoring -Wnoexcept-type to the one location where it is needed.

* Trying a second location.

* The previous commit worked (GitHub Actions green), but see the added comment about the dicy nature of -Wnoexcept-type ("if and only if").

* Applying reviewer suggestion.
This commit is contained in:
Ralf W. Grosse-Kunstleve 2021-07-30 07:09:55 -07:00 committed by Henry Schreiner
parent 05852fb6bc
commit 46c51fc03b
1 changed files with 16 additions and 3 deletions
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19
include/pybind11/pybind11.h
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@ -19,9 +19,6 @@
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Wunused-but-set-parameter"
# pragma GCC diagnostic ignored "-Wattributes"
# if __GNUC__ >= 7
# pragma GCC diagnostic ignored "-Wnoexcept-type"
# endif
#endif
#include "attr.h"
@ -49,6 +46,18 @@
# include <cxxabi.h>
#endif
/* https://stackoverflow.com/questions/46798456/handling-gccs-noexcept-type-warning
This warning is about ABI compatibility, not code health.
It is only actually needed in a couple places, but apparently GCC 7 "generates this warning if
and only if the first template instantiation ... involves noexcept" [stackoverflow], therefore
it could get triggered from seemingly random places, depending on user code.
No other GCC version generates this warning.
*/
#if defined(__GNUC__) && __GNUC__ == 7
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Wnoexcept-type"
#endif
PYBIND11_NAMESPACE_BEGIN(PYBIND11_NAMESPACE)
#if defined(_MSC_VER)
@ -2309,6 +2318,10 @@ inline function get_overload(const T *this_ptr, const char *name) {
PYBIND11_NAMESPACE_END(PYBIND11_NAMESPACE)
#if defined(__GNUC__) && __GNUC__ == 7
# pragma GCC diagnostic pop // -Wnoexcept-type
#endif
#if defined(_MSC_VER) && !defined(__INTEL_COMPILER)
# pragma warning(pop)
#elif defined(__GNUG__) && !defined(__clang__) && !defined(__INTEL_COMPILER)