fragments from the @file{config} directory. These are used to set
Makefile parameters that are not amenable to being calculated by
autoconf. The list of fragments to incorporate is set by
-@file{config.gcc}; @xref{System Config}.
+@file{config.gcc} (and occasionally @file{config.build}); @xref{System Config}.
Fragments are named either @file{t-@var{target}} or @file{x-@var{host}},
depending on whether they are relevant to configuring GCC to produce