/sys$common/syshlp/helplib.hlb CC, /OPTIMIZE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

     /OPTIMIZE[=option] (D)
     /NOOPTIMIZE

  Controls whether or not the compiler performs code optimization.
  /OPTIMIZE has the following options:

  [NO]DISJOINT   Directs the compiler to optimize the generated
                 machine code.

  [NO]INLINE     Specifies whether the compiler is allowed to perform
                 the function inline optimization.