Oracle Solaris Studio 12.2:C 用户指南

E.1.4.7 (6.1.3.4) The current locale used to convert multibyte characters into corresponding wide characters (codes) for a wide character constant(用于针对宽字符常量将多字节字符转换为相应宽字符的当前语言环境):

LC_ALLLC_CTYPELANG 环境变量指定的有效语言环境。