### Language-Dependent Compiler Options

Some IBM C and C++ Compilers options are only valid when compiling C programs, while others only apply to C++ programs.

C Programs Only

/qalias | Specifies aliasing rules. The typeptr, allptrs, and addrtaken suboptions can only be used in C programs. Only the ansi suboption can be used in C++ programs.
/Sg | Set margins for input files. This option is provided primarily for compatibility with IBM C/370. C++ does not require any such compatibility.
/Sq | Set sequence numbers for input files. This option is provided primarily for compatibility with IBM C/370. C++ does not require any such compatibility.
/Sr | Set type conversion rules. The C++ language only supports the new type conversion rules defined by the ANSI standard.
/Ss | Allow use of double slashes for comments. C++ allows double slashes to indicate comments as part of the language.
/S2 | Allow only SAA Level 2 C constructs. There is no SAA definition of the C++ language.

C++ Programs Only

/Ft | Control generation of files for template resolution. The C language does not support templates.
/Gk | Link with Version 2 C++ libraries.
/Gx | Control inclusion of C++ exception-handling information. The C language does not include specific constructs for exception handling.
/Sc | Allows constructs compatible with earlier versions of the C++ language. These constructs are not allowed in C.
/Nx | Set names of exception-handling segments.
/qrtti | Generate information for the typeid operator and the dynamic_cast operator.
/qsomvolattr | Use volatile on attribute prototypes.

Summary of Compiler Options
Summary of Compiler Options by Function