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Fix locale memmem namespace (bug 17585).

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Locale code, brought in by ISO C functions, calls memmem, which is not
an ISO C function.  This isn't an ISO C conformance bug, because all
mem* names are reserved, but glibc practice is not to rely on that
reservation (thus, memmem is only declared in string.h if __USE_GNU
even though ISO C would allow it to be declared unconditionally, for
example).  This patch changes that code to use __memmem.

Note: there are uses of memmem elsewhere in glibc that I didn't
change, although it may turn out some of those also need to use
__memmem.

Tested for x86_64 (testsuite, and that disassembly of installed shared
libraries is unchanged by this patch).

	[BZ #17585]
	* string/memmem.c [!_LIBC] (__memmem): Define to memmem.
	(memmem): Rename to __memmem and define as weak alias of
	__memmem.  Use libc_hidden_weak.
	(__memmem): Use libc_hidden_def.
	* include/string.h (__memmem): Declare.  Use libc_hidden_proto.
	* locale/findlocale.c (valid_locale_name): Use __memmem instead of
	memmem.
This commit is contained in:
Joseph Myers
2014-11-12 22:41:03 +00:00
parent c4eae75271
commit 9975e3d37d
5 changed files with 20 additions and 6 deletions
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2
include/string.h
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@ -90,6 +90,8 @@ extern char *__strsep_g (char **__stringp, const char *__delim);
libc_hidden_proto (__strsep_g)
libc_hidden_proto (strnlen)
libc_hidden_proto (memmem)
extern __typeof (memmem) __memmem;
libc_hidden_proto (__memmem)
libc_hidden_proto (__ffs)
libc_hidden_builtin_proto (memchr)