a33fa76fed
pointer-based newlib implementation. (_ctype_b): Declare. (__ctype_cp): Move to newlib. Declare. (__ctype_iso): Ditto. (__set_ctype): Implement changing __ctype_ptr__. Only copy character class data in applications built under older Cygwin. * cygwin.din (__ctype_ptr__): Export. * include/ctype.h: Remove in favor of newlib implementation. * include/cygwin/config.h (__EXPORT): Define alongside __IMPORT. * include/cygwin/version.h (CYGWIN_VERSION_CHECK_FOR_OLD_CTYPE): Define check for old vs. new ctype implementation. Bump API minor number.