Vax C90-EL SERIES Service Manual download pdf (Page 77)

#pragma Directives [3]

3.5.9 ident Directive

The ident directive directs the compiler to store the string indicated by text

into the object (.o) file. This can be used to place a source identification string

into an object file.

The format of this directive is as follows:

#pragma _CRI ident "text"

3.6 Instantiation Directives

The Cray Standard C++ compiler recognizes three instantiation directives.

Instantiation directives can be used to control the instantiation of specific

template entities or sets of template entities. The following directives are

described in detail in Section 6.4, page 114:

• #pragma _CRI instantiate

• #pragma _CRI do_not_instantiate

• #pragma _CRI can_instantiate

• The #pragma _CRI instantiate directive causes a specified entity to

be instantiated.

• The #pragma _CRI do_not_instantiate directive suppresses the

instantiation of a specified entity. It is typically used to suppress the

instantiation of an entity for which a specific definition is supplied.

• The #pragma _CRI can_instantiate directive indicates that a specified

entity can be instantiated in the current compilation, but need not be. It is

used in conjunction with automatic instantiation to indicate potential sites for

instantiation if the template entity is deemed to be required by the compiler.

See Chapter 6, page 109 for more information on template instantiation.

3.7 Vectorization Directives

Because vector operations cannot be expressed directly in Cray Standard C/C++,

the compilers must be capable of vectorization, which means transforming scalar

operations into equivalent vector operations. The candidates for vectorization

are operations in loops and assignments of structures. For more information,

see Optimizing Application Code on UNICOS Systems.

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Vax C90-EL SERIES Service Manual Page 77