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6187bd67c9
* lib/float.in.h: Add workarounds for FreeBSD/x86, AIX with GCC, IRIX. * lib/float.c: New file. * m4/float_h.m4 (gl_FLOAT_H): Also handle FreeBSD, AIX, IRIX. Set REPLACE_FLOAT_LDBL. * modules/float (Files): Add lib/float.c. (configure.ac): Invoke AC_LIBOBJ. * doc/posix-headers/float.texi: Mention problems on FreeBSD, AIX, IRIX.
24 lines
788 B
Plaintext
24 lines
788 B
Plaintext
@node float.h
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@section @file{float.h}
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POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/basedefs/float.h.html}
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Gnulib module: float
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Portability problems fixed by Gnulib:
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@itemize
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@item
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The values of @code{LDBL_*} macros are incorrect on some platforms:
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On OpenBSD 4.0, MirBSD 10, and BeOS, they are the same as the values of the
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@code{DBL_*} macros, although @samp{long double} is a larger type than
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@samp{double}.
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On FreeBSD/x86 6.4, they represent the incorrect 53-bit precision assumptions
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in the compiler, not the real 64-bit precision at runtime.
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On AIX 7.1 with GCC 4.2 and on IRIX 6.5, they don't reflect the
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``double double'' representation of @code{long double} correctly.
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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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@end itemize
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