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* modules/strstr: Split into... * modules/strstr-simple: ...new module that does not care about performance, but does care about glibc bug. * m4/strstr.m4 (gl_FUNC_STRSTR): Split... (gl_FUNC_STRSTR_SIMPLE): ...into new macro, which replaces strstr if platform memchr is broken, per Debian bug 521737. * m4/strcasestr.m4 (gl_FUNC_STRCASESTR_SIMPLE): React to broken memchr. * m4/memchr.m4 (gl_FUNC_MEMCHR): Only expand once. * doc/posix-functions/strstr.texi (strstr): Document the fix. * doc/glibc-functions/strcasestr.texi (strcasestr): Likewise. * modules/mountlist (Depends-on): Add strstr-simple. * modules/gen-uni-tables (Depends-on): Likewise. * modules/argz (Depends-on): Add strstr. Signed-off-by: Eric Blake <ebb9@byu.net>
33 lines
938 B
Plaintext
33 lines
938 B
Plaintext
@node strstr
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@section @code{strstr}
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@findex strstr
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POSIX specification: @url{http://www.opengroup.org/onlinepubs/9699919799/functions/strstr.html}
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Gnulib module: strstr or strstr-simple
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Portability problems fixed by either Gnulib module @code{strstr-simple}
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or @code{strstr}:
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@itemize
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@item
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This function can trigger memchr bugs on some platforms:
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glibc 2.10.
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@end itemize
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Portability problems fixed by Gnulib @code{strstr}:
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@itemize
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@item
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This function has quadratic instead of linear worst-case complexity on some
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platforms:
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glibc 2.8, MacOS X 10.3, FreeBSD 6.2, NetBSD 3.0, OpenBSD 4.0, AIX
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5.1, HP-UX 11, IRIX 6.5, OSF/1 5.1, Solaris 10, Cygwin 1.5.x, mingw.
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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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This function cannot work correctly on character strings in most multibyte
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locales. Gnulib provides an alternative function @code{mbsstr} that works
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on character strings in all locales.
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@end itemize
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