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oscplot.c:898:20: error: use of undeclared identifier 'M_PI' #440

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yurivict opened this issue Jul 11, 2023 · 0 comments

yurivict commented Jul 11, 2023 •

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You use -D_POSIX_C_SOURCE=200809L.

M_PI etc seems to be required only by late POSIX standards, e.g. IEEE Std 1003.1™-2017. I did not tried to look
for the earliest reference.

You need to compile with -D_XOPEN_SOURCE=700 if you want POSIX 2008 with XSI.

Source: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=271808

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