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10.24.228 math_errhandling ¶

ISO C23 specification:
https://www.open-std.org/jtc1/sc22/wg14/www/docs/n3220.pdf section 7.12.1

Documentation:
man math_error

Gnulib module: —

Portability problems fixed by Gnulib:

Portability problems not fixed by Gnulib:

• This macro is missing on some platforms: NetBSD 10.0, mingw.
• This macro does not describe the error behaviour of elementary arithmetic operations (+, -, *, /) and of mathematical operations for which the compiler emits inline code (such as sqrt on some CPUs).
• This macro does not describe the error behaviour of functions such as strtod.
• For mathematical operations in general, it is a safer bet to look at the exceptions set in the floating-point environment (by calling feclearexcept (FE_ALL_EXCEPT) before the operation and fetestexcept after the operation), regardless of math_errhandling.