r343111 breaks build

 I can not build CURRENT r343111 on r343022 world. Looks like r343111
itself cause problems (r343110 builds):

In file included from /data/src/contrib/libc++/src/algorithm.cpp:11:
In file included from /data/src/contrib/libc++/include/random:1646:
In file included from /data/src/contrib/libc++/include/istream:163:
In file included from /data/src/contrib/libc++/include/ostream:138:
In file included from /data/src/contrib/libc++/include/ios:216:
In file included from /data/src/contrib/libc++/include/__locale:18:
In file included from /data/src/contrib/libc++/include/mutex:191:
In file included from /data/src/contrib/libc++/include/__mutex_base:16:
In file included from /data/src/contrib/libc++/include/system_error:146:
In file included from /data/src/contrib/libc++/include/__errc:106:
In file included from /data/src/contrib/libc++/include/cerrno:27:
/data/src/contrib/libc++/include/errno.h:70:2: error: unterminated
conditional directive
#ifdef ELAST
 ^
/data/src/contrib/libc++/include/errno.h:63:2: error: unterminated
conditional directive
#ifdef ELAST
 ^
/data/src/contrib/libc++/include/errno.h:56:2: error: unterminated
conditional directive
#ifdef ELAST
 ^
/data/src/contrib/libc++/include/errno.h:52:2: error: unterminated
conditional directive
#if !defined(EOWNERDEAD) && !defined(ENOTRECOVERABLE) &&
!defined(EINTEGRITY)
 ^
/data/src/contrib/libc++/include/errno.h:36:2: error: unterminated
conditional directive
#if !defined(EOWNERDEAD) || !defined(ENOTRECOVERABLE) ||
!defined(EINTEGRITY)
 ^
/data/src/contrib/libc++/include/errno.h:34:2: error: unterminated
conditional directive
#ifdef __cplusplus
 ^
/data/src/contrib/libc++/include/errno.h:11:2: error: unterminated
conditional directive
#ifndef _LIBCPP_ERRNO_H
 ^
In file included from /data/src/contrib/libc++/src/algorithm.cpp:11:
In file included from /data/src/contrib/libc++/include/random:1646:
In file included from /data/src/contrib/libc++/include/istream:163:
In file included from /data/src/contrib/libc++/include/ostream:138:
In file included from /data/src/contrib/libc++/include/ios:216:
In file included from /data/src/contrib/libc++/include/__locale:18:
In file included from /data/src/contrib/libc++/include/mutex:191:
In file included from /data/src/contrib/libc++/include/__mutex_base:17:
In file included from
/data/src/contrib/libc++/include/__threading_support:16:
/data/src/contrib/libc++/include/errno.h:70:2: error: unterminated
conditional directive
#ifdef ELAST
 ^
/data/src/contrib/libc++/include/errno.h:63:2: error: unterminated
conditional directive
#ifdef ELAST
 ^
/data/src/contrib/libc++/include/errno.h:56:2: error: unterminated
conditional directive
#ifdef ELAST
 ^
/data/src/contrib/libc++/include/errno.h:52:2: error: unterminated
conditional directive
#if !defined(EOWNERDEAD) && !defined(ENOTRECOVERABLE) &&
!defined(EINTEGRITY)
 ^
/data/src/contrib/libc++/include/errno.h:36:2: error: unterminated
conditional directive
#if !defined(EOWNERDEAD) || !defined(ENOTRECOVERABLE) ||
!defined(EINTEGRITY)
 ^
/data/src/contrib/libc++/include/errno.h:34:2: error: unterminated
conditional directive
#ifdef __cplusplus
 ^
/data/src/contrib/libc++/include/errno.h:11:2: error: unterminated
conditional directive
#ifndef _LIBCPP_ERRNO_H
 ^


-- 
// Lev Serebryakov