VAX Options (Using the GNU Compiler Collection (GCC)) (original) (raw)

3.20.50 VAX Options ¶

These ‘-m’ options are defined for the VAX:

-munix ¶

Do not output certain jump instructions (aobleq and so on) that the Unix assembler for the VAX cannot handle across long ranges.

-mgnu ¶

Do output those jump instructions, on the assumption that the GNU assembler is being used.

-md ¶

-md-float

Use the D_floating data format for double-precision floating-point numbers instead of G_floating.

-mg ¶

-mg-float

Use the G_floating data format for double-precision floating-point numbers instead of D_floating.

-mlra ¶

-mno-lra

Enable Local Register Allocation. This is still experimental for the VAX, so by default the compiler uses standard reload.