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authorZack Weinberg <zackw@panix.com>2016-11-17 09:26:27 -0500
committerZack Weinberg <zackw@panix.com>2017-06-20 08:21:24 -0400
commit09a596cc2cf4e0f9f8e9f3bba4b1a97efcb13bcb (patch)
tree683187ce3396bef30d751b9dc139e9f90affffaa /bits
parentb8216e82783774e068106486a8f67357f63acc67 (diff)
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Remove bits/string.h.
These machine-dependent inline string functions have never been on by
default, and even if they were a good idea at the time they were
introduced, they haven't really been touched in ten to fifteen years
and probably aren't a good idea on current-gen processors.  Current
thinking is that this class of optimization is best left to the
compiler.

	* bits/string.h, string/bits/string.h
	* sysdeps/aarch64/bits/string.h
	* sysdeps/m68k/m680x0/m68020/bits/string.h
	* sysdeps/s390/bits/string.h, sysdeps/sparc/bits/string.h
	* sysdeps/x86/bits/string.h: Delete file.

	* string/string.h: Don't include bits/string.h.
	* string/bits/string3.h: Rename to bits/string_fortified.h.
	No need to undef various symbols that the removed headers
	might have defined as macros.
	* string/Makefile (headers): Remove bits/string.h, change
	bits/string3.h to bits/string_fortified.h.
	* string/string-inlines.c: Update commentary.  Remove definitions
	of various macros that nothing looks at anymore.  Don't directly
	include bits/string.h. Set _STRING_INLINE_unaligned here, based on
	compiler-predefined macros.
	* string/strncat.c: If STRNCAT is not defined, or STRNCAT_PRIMARY
	_is_ defined, provide internal hidden alias __strncat.
	* include/string.h: Declare internal hidden alias __strncat.
	Only forward __stpcpy to __builtin_stpcpy if __NO_STRING_INLINES is
	not defined.
	* include/bits/string3.h: Rename to bits/string_fortified.h,
	update to match above.

	* sysdeps/i386/string-inlines.c: Define compat symbols for
	everything formerly defined by sysdeps/x86/bits/string.h.
	Make existing definitions into compat symbols as well.
	Remove some no-longer-necessary messing around with macros.

	* sysdeps/powerpc/powerpc32/power4/multiarch/mempcpy.c
	* sysdeps/powerpc/powerpc64/multiarch/mempcpy.c
	* sysdeps/powerpc/powerpc64/multiarch/stpcpy.c
	* sysdeps/s390/multiarch/mempcpy.c
	No need to define _HAVE_STRING_ARCH_mempcpy.
	Do define __NO_STRING_INLINES and NO_MEMPCPY_STPCPY_REDIRECT.

	* sysdeps/i386/i686/multiarch/strncat-c.c
	* sysdeps/s390/multiarch/strncat-c.c
	* sysdeps/x86_64/multiarch/strncat-c.c
	Define STRNCAT_PRIMARY.  Don't change definition of libc_hidden_def.
Diffstat (limited to 'bits')
-rw-r--r--bits/string.h18
1 files changed, 0 insertions, 18 deletions
diff --git a/bits/string.h b/bits/string.h
deleted file mode 100644
index 89c627c182..0000000000
--- a/bits/string.h
+++ /dev/null
@@ -1,18 +0,0 @@
-/* This file should provide inline versions of string functions.
-
-   Surround GCC-specific parts with #ifdef __GNUC__, and use `__extern_inline'.
-
-   This file should define __STRING_INLINES if functions are actually defined
-   as inlines.  */
-
-#ifndef _BITS_STRING_H
-#define _BITS_STRING_H	1
-
-/* Define whether to use the unaligned string inline ABI.
-   The string inline functions are an external ABI, thus cannot be changed
-   after the first release of a new target (unlike _STRING_ARCH_unaligned
-   which may be changed from release to release).  Targets must support
-   unaligned accesses in hardware if either define is set to true.  */
-#define _STRING_INLINE_unaligned   0
-
-#endif /* bits/string.h */