-C

Check array references for out of range subscripts.

SPARC: 77/90 x86:77

Subscripting arrays beyond their declared sizes may result in unexpected results, including segmentation faults. The -C option checks for possible array subscript violations in the source code and during execution.

Specifying -C may make the executable file larger.

If the -C option is used, array subscript violations are treated as an error. If an array subscript range violation is detected in the source code during compilation, it is treated as a compilation error.

If an array subscript violation can only be determined at runtime, the compiler generates range-checking code into the executable program. This may cause an increase in execution time. As a result, it is appropriate to enable full array subscript checking while developing and debugging a program, then recompiling the final production executable without subscript checking.