Category
Pragma equivalent
#pragma options ignprag
Purpose
Instructs the compiler to ignore certain pragma statements.
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 ignprag with the -O option, the information specified in the aliasing pragmas is likely incorrect.
Syntax
.- :--------------------. V | >>- -qignprag--=----+-------------------+-+-------------------->< +-+-all-----------+-+ | +-disjoint------+ | | '-isolated_call-' | +-ibm---------------+ '-omp---------------'
Defaults
Not applicable.
Parameters
- all
- Ignores all #pragma isolated_call and #pragma disjoint directives in the source file.
- disjoint
- Ignores all #pragma disjoint directives in the source file.
- ibm
- Ignores all #pragma ibm snapshot directives and all IBM SMP directives (such as #pragma ibm schedule) in the source file.
- isolated_call
- Ignores all #pragma isolated_call directives in the source file.
- omp
- Ignores all OpenMP parallel processing directives in the source file, such as #pragma omp parallel, #pragma omp critical.
Predefined macros
None.
Examples
To compile myprogram.c and
ignore any #pragma isolated_call directives, enter:
xlc myprogram.c -qignprag=isolated_call