C++11 1.4 [intro.compliance]/p7 "A freestanding implementation is one in which execution may take place without the benefit of an operating system, and has an i

C++11 1.4 [intro.compliance]/p7 "A freestanding implementation is one in which execution may take place without the benefit of an operating system, and has an implementation-defined set of libraries that includes certain language-support libraries" [1] C11 4 [conformance]/p6 "A conforming freestanding implementation shall accept any strictly conforming program in which the use of the features specified in the library clause (clause 7) is confined to the contents of the standard headers <float.h>, <iso646.h>, <limits.h>, <stdalign.h>, <stdarg.h>, <stdbool.h>, <stddef.h>, <stdint.h>, and <stdnoreturn.h>." [2] [1] http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2011/n3242.pdf http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2011/n324... [2] http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1570.pdf http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1570.pdf