@item
The foreign type specifier @code{(sb-alien:enum @var{name} &rest
@var{specs})} describes an enumeration type that maps between integer
-values and keywords. If @var{name} is @code{nil}, then the type is
+values and symbols. If @var{name} is @code{nil}, then the type is
anonymous. Each element of the @var{specs} list is either a Lisp
-keyword, or a list @code{(@var{keyword} @var{value})}. @var{value} is
+symbol, or a list @code{(@var{symbol} @var{value})}. @var{value} is
an integer. If @var{value} is not supplied, then it defaults to one
greater than the value for the preceding spec (or to zero if it is the
first spec).
@item
The foreign type specifier @code{sb-alien:c-string} is similar to
-@code{(* char)}, but is interpreted as a null-terminated string, and
-is automatically converted into a Lisp string when accessed; or if the
+@code{(* char)}, but is interpreted as a null-terminated string, and is
+automatically converted into a Lisp string when accessed; or if the
pointer is C @code{NULL} or @code{0}, then accessing it gives Lisp
-@code{nil}. Lisp strings are stored with a trailing NUL
-termination, so no copying (either by the user or the implementation)
-is necessary when passing them to foreign code.
+@code{nil}. Lisp strings of type @code{base-string} are stored with a
+trailing NUL termination, so no copying (either by the user or the
+implementation) is necessary when passing them to foreign code; strings
+of type @code{(simple-array character (*))} are copied by the
+implementation as required.
Assigning a Lisp string to a @code{c-string} structure field or
variable stores the contents of the string to the memory already
order to enable incremental loading with some linkers, you may need to
say @samp{cc -G 0 -c test.c})
-Once the C code has been compiled, you can start up Lisp and load it
-in: @samp{sbcl} Lisp should start up with its normal prompt.
+Once the C code has been compiled, you can start up Lisp and load it in:
+@samp{sbcl}. Lisp should start up with its normal prompt.
Within Lisp, compile the Lisp file. (This step can be done
separately. You don't have to recompile every time.)