genproto

Syntax

    -qgenproto | -qgenproto=parmnames | -qnogenproto

Purpose
Produces ANSI prototypes from K&R function definitions. This should help to ease the transition from K&R to ANSI.

Notes
Using -qgenproto without PARMnames will cause prototypes to be generated without parameter names. Parameter names are included in the prototype when PARMnames is specified.

Example
For the following function, foo.c:

foo(a,b,c)
  float a;
  int *b;

specifying

xlC -c -qgenproto foo.c

produces

int foo(double, int*, int);

The parameter names are dropped. On the other hand, specifying

xlC -c -qgenproto=parm foo.c

produces

int foo(double a, int* b, int c);

In this case the parameter names are kept.

Note that float a is represented as double or double a in the prototype, since ANSI states that all narrow-type arguments (such as chars, shorts, and floats) are widened before they are passed to K&R functions.

List of Compiler Options and Their Defaults
Options that Specify Compiler Characteristics