Ralf W. Grosse-Kunstleve b1bd7f2600
fix: define (non-empty) PYBIND11_EXPORT_EXCEPTION only under macOS. (#4298)
Background: #2999, #4105, #4283, #4284

In a nutshell:

* Only macOS actually needs `PYBIND11_EXPORT_EXCEPTION` (#4284).

* Evidently (#4283), under macOS `PYBIND11_EXPORT_EXCEPTION` does not run the risk of introducing ODR violations,

* but evidently (#4283) under Linux it does, in the presumably rare/unusual situation that `RTLD_GLOBAL` is used.

* Windows does no have the equivalent of `RTLD_GLOBAL`, therefore `PYBIND11_EXPORT_EXCEPTION` has no practical benefit, on the contrary, noisy warning suppression pragmas are needed, therefore it is best left empty.
2022-10-31 13:36:26 -04:00
..
2022-07-27 10:41:57 -07:00
2022-02-11 19:06:16 -05:00
2022-09-14 14:00:27 -07:00