getentropy       1189 lib/unistd.in.h _GL_FUNCDECL_SYS (getentropy, int, (void *buffer, size_t length));
getentropy       1191 lib/unistd.in.h _GL_CXXALIAS_SYS (getentropy, int, (void *buffer, size_t length));
getentropy       1192 lib/unistd.in.h _GL_CXXALIASWARN (getentropy);
getentropy       1196 lib/unistd.in.h _GL_WARN_ON_USE (getentropy, "getentropy is unportable - "