24 lines
663 B
Plaintext
24 lines
663 B
Plaintext
@node fenv.h
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@section @file{fenv.h}
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POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/fenv.h.html}
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Gnulib module: fenv
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@mindex fenv
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Portability problems fixed by Gnulib:
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@itemize
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@item
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This header file is missing on some platforms:
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FreeBSD 5.2.1, NetBSD 5.0, OpenBSD 3.8, AIX 5.1, Cygwin 1.7.7, MSVC 9.
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@end itemize
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Portability problems not fixed by Gnulib:
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@itemize
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@item
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On MSVC, the values of the rounding direction macros have changed:
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@c https://github.com/MicrosoftDocs/cpp-docs/issues/4796
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In MSVC 14, @code{FE_UPWARD} is 0x100 and @code{FE_DOWNWARD} is 0x200,
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whereas in MSVC 14.30, it's the opposite.
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@end itemize
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