K 10 svn:author V 7 pluknet K 8 svn:date V 27 2013-12-19T17:29:56.708370Z K 7 svn:log V 534 MFC r255194 and prerequisites r229494,229496: Introduce internal macros for __U/INT64_C to define the U/INT64_MAX/MIN values properly. The previous definition only worked if __STDC_LIMIT_MACROS and __STDC_CONSTANT_MACROS were defined at the same time. Newer versions of gcc define __INT64_C and __UINT64_C, so avoid redefining them if gcc provides them. Applying r255194 fixes stable/9 host to allow source upgrading to the newer versions with usr.bin/dtc included in bootstrap tools. Approved by: imp (MFC to stable/9) END