Gcc/10.2.0/gcc/VAX-Options

From Get docs

3.19.55 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.