1make: "varmod-loop-varname.mk" line 17: In the :@ modifier, the variable name "${:Ubar:S,b,v,}" must not contain a dollar 2 while evaluating "${:Uone two three:@${:Ubar:S,b,v,}@+${var}+@} != "+one+ +two+ +three+"" with value "one two three" 3make: "varmod-loop-varname.mk" line 87: In the :@ modifier, the variable name "v$" must not contain a dollar 4 while evaluating variable "1 2 3" with value "1 2 3" 5make: "varmod-loop-varname.mk" line 93: In the :@ modifier, the variable name "v$$" must not contain a dollar 6 while evaluating variable "1 2 3" with value "1 2 3" 7make: "varmod-loop-varname.mk" line 99: In the :@ modifier, the variable name "v$$$" must not contain a dollar 8 while evaluating variable "1 2 3" with value "1 2 3" 9make: Fatal errors encountered -- cannot continue 10make: stopped making "all" in unit-tests 11exit status 1 12