Reported on the Debian BTS:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=780106
llvm-svn: 232714
// locale. Linux, not so much. The following functions avoid the locale when
// that's possible and otherwise do the wrong thing. FIXME.
#if defined(__linux__) || defined(__EMSCRIPTEN__) || defined(_AIX) || \
- defined(_NEWLIB_VERSION)
+ defined(_NEWLIB_VERSION) || defined(__GLIBC__)
#ifdef _LIBCPP_LOCALE__L_EXTENSIONS
decltype(MB_CUR_MAX_L(_VSTD::declval<locale_t>()))