Instructs the compiler to ignore certain pragma statements.
where pragma statements affected by this option are:
disjoint Ignores all #pragma disjoint directives in the source file. isolated Ignores all #pragma isolated_call directives in the source file. all Ignores all #pragma isolated_call and #pragma disjoint directives in the source file. omp Ignores all OpenMP parallel processing directives in the source file, such as #pragma omp parallel, #pragma omp critical.
See also #pragma options.
This option is useful for detecting aliasing pragma errors. Incorrect aliasing gives runtime errors that are hard to diagnose. When a runtime error occurs, but the error disappears when you use -qignprag with the -O option, the information specified in the aliasing pragmas is likely incorrect.
To compile myprogram.c and ignore any #pragma isolated_call directives, enter:
xlc myprogram.c -qignprag=isolated
Compiler Command Line Options
#pragma disjoint
#pragma isolated_call
#pragma options
Pragmas to Control Parallel Processing