* cdl/isoinfra.cdl: Typo: CYGBLD_ISO_STDIO_FILEPOS -> CYGBLD_ISO_STDIO_FILEPOS_HEADER. * include/limits.h: Avoid potential illegal recursion if already been included by GCC's limits.h. * include/stdio.h: Include stdarg.h to save duplication. Give fileno(),fdopen() throw specifiers. * include/unistd.h: Prototype for rename() lives in stdio.h.