Mixed mode disassembly listing -- impossible?

[Timo Finnilä]

Hi,

In the section 8.6 of "GDB User Manual"
(http://sourceware.org/gdb/current/onlinedocs/gdb_9.html#SEC64)
is said that it is possible to get mixed mode (both source and machine
code) listing from
the "disassemble" command by using the "/m" option. However, when I
try this (e.g. by saying
"disassemble /m someFunction" with GDB 8.6, i only get "A syntax error
in expression,
near '/m'." complaint. What am I missing here? Or doing wrong?

BR,

Timo F.