p Check the marshaling facilities (trying to read the result of linux/amd64)
+! setenv GRAS_NO_WARN_EXPERIMENTAL=1
$ $SG_TEST_EXENV gras/datadesc/datadesc_usage --read ${srcdir:=.}/gras/datadesc/datadesc.little64 --log=test.thres:verbose --log=structs.thres:info "--log=root.fmt:%m%n" $ARGS
> Read from file datadesc.little64
> This file was generated on little64 (4)