Object code control

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Table 1. Object code control pragmas
Pragma Description
XL-based front end begins#pragma alloca (C only)

Provides an inline definition of system function alloca when it is called from source code that does not include the alloca.h header.
XL-based front end begins#pragma comment

Places a comment into the object module.

XL-based front end begins C only#pragma fini (C only)

Specifies the order in which the runtime library calls a list of functions after main() completes or exit() is called.
XL-based front end begins#pragma hashome (C++ only)

Informs the compiler that the specified class has a home module that will be specified by #pragma ishome.

XL-based front end begins #pragma ishome (C++ only)

Informs the compiler that the home module of the specified class is the current compilation unit.
XL-based front end begins C only#pragma init (C only)

Specifies the order in which the runtime library calls a list of functions before main() is called.
XL-based front end begins#pragma map

Converts all references to an identifier to another, externally defined identifier.

#pragma pack

Sets the alignment of all aggregate members to a specified byte boundary.

XL-based front end begins

Specifies the priority level for the initialization of static objects.

XL-based front end begins#pragma reg_killed_by

Specifies registers that may be altered by functions specified by #pragma mc_func.
XL-based front end begins#pragma strings

Specifies the storage type for string literals.

XL-based front end begins#pragma weak

Prevents the linker from issuing error messages if it encounters a symbol multiply-defined during linking, or if it does not find a definition for a symbol.