You can use the #pragma options preprocessor
directive to override the default values for compiler options. The
exception is LONGNAME | NOLONGNAME, where the compiler options override
the #pragma preprocessor directives. Compiler options that are specified
on the command line or in the CPARM parameter of the IBM-supplied
cataloged procedures can override compiler options that are used in #pragma
options. The exception is CSECT, where the #pragma
csect directive takes precedence. For complete details
on the #pragma
options preprocessor directive, see z/OS XL C/C++ Language Reference.
The
#pragma options preprocessor directive must
appear before the first
z/OS® XL C statement
in your input source file. Only comments and other preprocessor directives
can precede the
#pragma options directive. Only
the options that are listed below can be specified in a
#pragma
options directive. If you specify a compiler option that
is not in the following list, the compiler generates a warning message,
and does not use the option.
| AGGREGATE |
ALIAS |
| ANSIALIAS |
ARCHITECTURE |
| CHECKOUT |
GONUMBER |
| IGNERRNO |
INLINE |
| LIBANSI |
MAXMEM |
| OBJECT |
OPTIMIZE |
| RENT |
SERVICE |
| SPILL |
START |
| TEST |
TUNE |
| UPCONV |
XREF |
Notes: - When you specify conflicting attributes explicitly, or implicitly
by the specification of other options, the last explicit option is
accepted. The compiler usually does not issue a diagnostic message
indicating that it is overriding any options.
- When you compile your program with the SOURCE compiler option, an
options list in the listing indicates the options in effect at invocation.
The values in the list are the options that are specified on the
command line, or the default options that were specified at installation.
These values do not reflect options that are specified in the #pragma
options directive.