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

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.