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0c5e7922f8
* modules/trunc-ieee: New file. * m4/trunc.m4 (gl_FUNC_TRUNC): If gl_FUNC_TRUNC_IEEE is also used, test whether trunc works according to ISO C 99 with IEC 60559. * m4/trunc-ieee.m4: New file. * lib/math.in.h (trunc): Replace if REPLACE_TRUNC is set. * m4/math_h.m4 (gl_MATH_H_DEFAULTS): Initialize REPLACE_TRUNC. * modules/math (Makefile.am): Substitute REPLACE_TRUNC. * modules/trunc-ieee-tests: New file. * tests/test-trunc-ieee.c: New file, based on tests/test-truncf-ieee.c. * tests/test-trunc1.c (main): Remove signbit tests. * modules/trunc-tests (Depends-on): Remove 'signbit'. * doc/posix-functions/trunc.texi: Mention the new module.
30 lines
753 B
Plaintext
30 lines
753 B
Plaintext
@node trunc
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@section @code{trunc}
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@findex trunc
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POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/trunc.html}
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Gnulib module: trunc or trunc-ieee
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Portability problems fixed by either Gnulib module @code{trunc} or @code{trunc-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, NetBSD 3.0, OpenBSD 3.8, Solaris 9, Interix 3.5.
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@item
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This function is not declared (without @code{-D_GNU_SOURCE}) on some platforms:
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glibc 2.8.
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@end itemize
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Portability problems fixed by Gnulib module @code{trunc-ieee}:
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@itemize
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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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