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* m4/roundf.m4 (gl_FUNC_ROUNDF): Search for roundf() in the libraries also when it is not declared. Set HAVE_ROUNDF. For replacement code, test HAVE_ROUNDF, not HAVE_DECL_ROUNDF. * modules/roundf (configure.ac): For replacement code, test HAVE_ROUNDF, not HAVE_DECL_ROUNDF. (Depends-on): Update conditions. * modules/roundf-ieee (Depends-on): Update conditions. * doc/posix-functions/roundf.texi: Mention the IRIX problem.
37 lines
1015 B
Plaintext
37 lines
1015 B
Plaintext
@node roundf
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@section @code{roundf}
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@findex roundf
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POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/roundf.html}
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Gnulib module: roundf or roundf-ieee
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Portability problems fixed by either Gnulib module @code{roundf} or @code{roundf-ieee}:
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@itemize
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@item
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This function is missing on some platforms:
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FreeBSD 5.2.1, OpenBSD 3.8, Minix 3.1.8, AIX 5.1, HP-UX 11, older IRIX 6.5, OSF/1 4.0, Solaris 9, MSVC 9, Interix 3.5.
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@item
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This function is not declared on some platforms:
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glibc 2.8, IRIX 6.5, OSF/1 5.1.
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@item
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This functions returns a wrong result for x = 1/2 - 2^-25 on some platforms:
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mingw.
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@end itemize
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Portability problems fixed by Gnulib module @code{roundf-ieee}:
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@itemize
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@item
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This function returns a positive zero for an argument between -0.5 and 0
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on some platforms:
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AIX 7.1, OSF/1 5.1.
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@item
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This function returns a positive zero for a minus zero argument
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on some platforms:
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OSF/1 5.1.
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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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