iverilog/ivtest/vvp_tests/vams_abs1.json

{
    "type" : "normal",
    "source" : "vams_abs1.v",
    "iverilog-args" : [ "-gverilog-ams" ],
    "vlog95" : {
        "iverilog-args" : [ "-pallowsigned=1" ]
    }
}