--- gforth/dis-gdb.fs	2004/06/15 09:15:06	1.2
+++ gforth/dis-gdb.fs	2004/08/23 14:03:52	1.4
@@ -18,14 +18,14 @@
 \ along with this program; if not, write to the Free Software
 \ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
 
-: append-extend-string ( addr1 u1 addr2 u2 -- addr2 u1+u2 )
-    \ concatenate string1 and string2 with dynamic memory allocation
-    swap >r dup >r extend-mem ( to addr2 u1+u2 r: addr2 u2 )
+: append-extend-string ( addr1 u1 addr2 u2 -- addr3 u1+u2 )
+    \ append string2 to string1 with dynamic memory reallocation.
+    swap >r dup >r extend-mem ( to addr3 u1+u2 r: addr2 u2 )
     rot r> r> rot rot chars move ;
 
 : disasm-gdb { addr u -- }
     base @ >r hex
-    s\" file=`mktemp -t gforthdis.XXXXXXXXXX` && file2=`mktemp -t gforthdis.XXXXXXXXXX` && echo \"set verbose off\nset logging file $file\nset logging on\ndisas " save-mem ( addr u addr1 u1 )
+    s\" type mktemp >/dev/null && type gdb >/dev/null && file=`mktemp -t gforthdis.XXXXXXXXXX` && file2=`mktemp -t gforthdis.XXXXXXXXXX` && echo \"set verbose off\nset logging file $file\nset logging on\ndisas " save-mem ( addr u addr1 u1 )
     addr 0 <<# bl hold # #s 'x hold # #> append-extend-string #>>
     addr u + 0 <<# # #s 'x hold # #> append-extend-string #>>
     r> base ! cr