* config/{tc-alpha.h, tc-arc.h, tc-d10v.h, tc-generic.h, tc-i960.h,

	* config/{tc-alpha.h, tc-arc.h, tc-d10v.h, tc-generic.h, tc-i960.h,
	tc-mn10200.h, tc-mn10300.h, tc-sh.h, tc-v850.h, tc-vax.h, tc-w65.h}:
	Add default definition of zero for TARGET_BYTES_BIG_ENDIAN.
	* config/{tc-arm.h, tc-hppa.h, tc-i386.h, tc-mips.h, tc-ns32k.h,
 	tc-ppc.h, tc-sparc.h}: Move definition of TARGET_BYTES_BIG_ENDIAN
	to a location consistent with the rest of the target include files.
	* config/tc-i386.c: Remove misleading comment.
	* doc/internals.texi (CPU backend): Add description of function
	md_undefined_symbol.
start-sanitize-tic80
	* config/tc-tic80.c: Add code to insert predefined symbols into the
	symbol table so they can be parsed by the standard expression parser.
	Remove custom code that use to parse them.
	* config/tc-tic80.h: Move definition of TARGET_BYTES_BIG_ENDIAN
	to a location consistent with the rest of the target include files.
end-sanitize-tic80