* Allow lists in package bindings, e.g.,

("srcs", [Relative("foo/bar.c"), Relative("foo/baz.h")])

  The result is an environment variable that contains the path names of the
  inputs separated by spaces (so this is not safe for values containing
  spaces).

src/fix.cc

@@ -170,6 +170,18 @@ static string processBinding(EvalState & state, Expr e, FState & fs)
     
     if (ATmatch(e, "False")) return "";
 
+    ATermList l;
+    if (ATmatch(e, "[<list>]", &l)) {
+	string s;
+	bool first = true;
+        while (!ATisEmpty(l)) {
+	    if (!first) s = s + " "; else first = false;
+	    s += processBinding(state, evalExpr(state, ATgetFirst(l)), fs);
+            l = ATgetNext(l);
+        }
+	return s;
+    }
+    
     throw badTerm("invalid package binding", e);
 }