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| From: | Markus Mützel |
| Subject: | [Octave-bug-tracker] [bug #61812] Math constants (e.g. M_PI) are not part of C/C++ standard |
| Date: | Thu, 13 Jan 2022 12:29:18 -0500 (EST) |
| User-agent: | Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/97.0.4692.71 Safari/537.36 Edg/97.0.1072.55 |
Follow-up Comment #8, bug #61812 (project octave):
Re-reading the POSIX specs:
> An XSI-conforming application shall ensure that the feature test macro
_XOPEN_SOURCE is defined with the value 700 before inclusion of any header.
This is needed to enable the functionality described in The _POSIX_C_SOURCE
Feature Test Macro and to ensure that the XSI option is enabled.
I now think that we should define that macro in our "octave-config.h". Not
just in those headers that include <cmath>...
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