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https://https.git.savannah.gnu.org/git/gnulib.git
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Bruno Haible
c36a0f21b3
* doc/Makefile (undocumented-modules.texi): New rule. (%.info, %.html, %.dvi, %.pdf): Depend on undocumented-modules.texi. (mostlyclean): Remove also *.m and *.tmp. (force): New rule. * doc/*.texi: Add module index entries. * doc/*/*.texi: Likewise.
34 lines
913 B
Plaintext
34 lines
913 B
Plaintext
@node log2
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@subsection @code{log2}
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@findex log2
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POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9799919799/functions/log2.html}
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Gnulib module: log2 or log2-ieee
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@mindex log2
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@mindex log2-ieee
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Portability problems fixed by either Gnulib module @code{log2} or @code{log2-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 6.0, NetBSD 3.0, OpenBSD 3.8, Minix 3.1.8, AIX 5.1, Solaris 9, MSVC 9, Android 4.2.
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@item
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This function is only provided as a macro on some platforms:
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Cygwin 1.5.x.
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@item
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This function returns slightly wrong values for exact powers of 2 on some platforms:
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Cygwin 1.7.9.
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@end itemize
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Portability problems fixed by Gnulib module @code{log2-ieee}:
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@itemize
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@item
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This function returns a wrong value for a negative argument on some platforms:
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NetBSD 5.1, Solaris 10/x86_64.
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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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