Compile error when using some --mm options

[doug719]

Using nim 2.0.8. and loaded latest bignum from this site. My program runs fine with -mm options orc and arc. When I use refc, markAndSweep, or boehm I get the following error:

/home/doug/.nimble/pkgs2/gmp-0.2.6-325cdfe29f675afb2262877f78d6bb676522d9bb/gmp/pure.nim(1512, 1) Error: signature for '=destroy' must be proc[T: object](x: var T)

[doug719]

-mm should be --mm. Could not edit.