56 lines
1.7 KiB
Plaintext
56 lines
1.7 KiB
Plaintext
@node limits.h
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@section @file{limits.h}
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POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/limits.h.html}
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Gnulib module: limits-h or gethostname
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@mindex limits-h
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@mindex gethostname
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Portability problems fixed by Gnulib module @code{limits-h}:
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@itemize
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@item
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The macros @code{LLONG_MIN}, @code{LLONG_MAX}, @code{ULLONG_MAX} are not
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defined on some platforms:
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older glibc systems (e.g. Fedora 1), AIX 5.1, HP-UX 11, OpenVMS.
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@item
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The macro @code{MB_LEN_MAX} is not defined on some platforms:
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pcc 1.2.0.DEVEL 20220331.
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@item
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The macros @code{WORD_BIT}, @code{LONG_BIT} are not defined on some platforms:
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glibc 2.11 without @code{-D_GNU_SOURCE}, Cygwin, mingw, MSVC 14.
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@item
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Macros like @code{CHAR_WIDTH} are not defined on some platforms:
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glibc 2.24, NetBSD 10.0, many others.
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@item
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The macros @code{BOOL_MAX} and @code{BOOL_WIDTH} are not defined on
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some platforms:
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glibc 2.32, many others.
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@item
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The macro @code{BOOL_MAX} is not defined with some compilers:
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clang 15.0.6.
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@item
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The macro @code{SSIZE_MAX} is not defined on some platforms:
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MSVC 14.
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@end itemize
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Portability problems fixed by Gnulib module @code{gethostname}:
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@itemize
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@item
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The @code{HOST_NAME_MAX} macro is not defined on some platforms:
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macOS 11.1, FreeBSD 14.0, NetBSD 10.0, OpenBSD 7.5, AIX 5.1, HP-UX 11, Solaris 11.4, Cygwin 1.5.x, mingw, MSVC 14.
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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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The macro @code{SSIZE_MAX} has the wrong type,
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albeit with the correct value:
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32-bit glibc 2.24 (on some architectures), Cygwin 2.5.2.
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@end itemize
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@mindex pathmax
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For @code{PATH_MAX}, Gnulib provides a module @code{pathmax} with a header
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file @code{"pathmax.h"}. It defines @code{PATH_MAX} to a constant on
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platforms with a file name length limit.
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