[variable-substitution-variable-declaration.html]
  [target1 --var2]
    expected:
      if (os == "linux") and not debug: ["PASS", "FAIL"]

  [target2 --var1]
    expected:
      if (os == "linux") and not debug: ["PASS", "FAIL"]

  [target3 --var1]
    expected:
      if (os == "linux") and not debug: ["PASS", "FAIL"]

  [target3 --var2]
    expected:
      if (os == "linux") and not debug: ["PASS", "FAIL"]

  [target4 --varC]
    expected:
      if (os == "linux") and not debug: ["PASS", "FAIL"]

  [target8 --varB]
    expected:
      if (os == "linux") and not debug: ["PASS", "FAIL"]

  [target9 --varA]
    expected:
      if (os == "linux") and not debug: ["PASS", "FAIL"]

