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* lib/math.in.h (FP_ILOGB0, FP_ILOGBNAN): Define fallback. * tests/test-math.c: Check that FP_ILOGB0, FP_ILOGBNAN are defined. (main): Check their values. * doc/posix-headers/math.texi: Mention the FP_ILOGB0, FP_ILOGBNAN problem.
49 lines
1.3 KiB
Plaintext
49 lines
1.3 KiB
Plaintext
@node math.h
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@section @file{math.h}
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POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/basedefs/math.h.html}
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Gnulib module: math
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Portability problems fixed by Gnulib:
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@itemize
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@item
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The conversion from @code{int} to @code{long double} in incorrect on some
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platforms:
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glibc 2.7 on Linux/SPARC64.
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@item
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The macro @code{NAN} is not defined on some platforms:
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OpenBSD 4.0, AIX 5.1, IRIX 6.5, OSF/1 5.1.
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@item
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The macro @code{NAN} is not exposed outside of C99 compilation on some
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platforms:
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glibc.
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@item
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The macros @code{NAN} and @code{HUGE_VAL} expand to a function address
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rather than a floating point constant on some platforms:
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Solaris 10.
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@item
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The macros @code{HUGE_VALF} and @code{HUGE_VALL} are not defined on some
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platforms:
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glibc/HPPA, glibc/SPARC, AIX 5.1, IRIX 6.5, Solaris 9, MSVC 9.
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@item
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The macros @code{FP_ILOGB0} and @code{FP_ILOGBNAN} are not defined on some
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platforms:
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NetBSD 5.1, AIX 5.1, IRIX 6.5, Solaris 9, 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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@code{NAN} is not a compile time constant with some compilers:
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OSF/1 with Compaq (ex-DEC) C 6.4.
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@item
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The macro or variable @code{math_errhandling} is not defined on some platforms:
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glibc 2.11, OpenBSD 4.9, NetBSD 5.1, UP-UX 11, IRIX 6.5, OSF/1 5.1, Cygwin 1.7.9, mingw, MSVC 9.
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@end itemize
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