<para>Unregisterised compilation can be useful when porting GHC to
a new machine, since it reduces the prerequisite tools to
- <program>gcc</program>, <program>as</program>, and
- <program>ld</program> and nothing more, and furthermore the amount
+ <command>gcc</command>, <command>as</command>, and
+ <command>ld</command> and nothing more, and furthermore the amount
of platform-specific code that needs to be written in order to get
unregisterised compilation going is usually fairly small.</para>