Using the GNU Compiler Collection (GCC): VAX Options

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#### 3.19.56 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.

`-mg`

  Output code for G-format floating-point numbers instead of D-format.

`-mlra`
`-mno-lra`

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