Enables compiler support for vector data types.
.-noaltivec-. >>- -q--+-altivec---+------------------------------------------><
This option instructs the compiler to support vector data types and operators and has effect only when -qarch is set or implied to be a target architecture that supports VMX instructions and the -qenablevmx compiler option is in effect (it is in effect by default on currently supported Linux distributions). Otherwise, the compiler will ignore -qaltivec and issue a warning message.
When -qaltivec is in effect, the following macros are defined:
To enable compiler support for vector programming, enter:
xlc myprogram.c -qarch=ppc64v -qaltivec
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