Pragma directive syntax

XL C/C++ supports the following forms of pragma directives:

#pragma name

This form uses the following syntax:


              .------------------------.   
              V                        |   
>>-#--pragma----name--(--suboptions--)-+-----------------------><

The name is the pragma directive name, and the suboptions are any required or optional suboptions that can be specified for the pragma, where applicable.

_Pragma ("name")

This form uses the following syntax:


                  .------------------------.         
                  V                        |         
>>-_Pragma--(--"----name--(--suboptions--)-+--"--)-------------><

For example, the statement:

_Pragma ( "pack(1)" )

is equivalent to:

#pragma pack(1)

For all forms of pragma statements, you can specify more than one name and suboptions in a single #pragma statement.

The name on a pragma is subject to macro substitutions, unless otherwise stated. The compiler ignores unrecognized pragmas, issuing an informational message indicating this.

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