fixes bootstrapping problems

compiler/jsgen.nim

@@ -2265,7 +2265,7 @@ proc genClass(conf: ConfigRef; obj: PType; content: Rope; ext: string) =
             "class $#$# {$n$#$n}$n") %
            [rope(VersionAsString), cls, extends, content]
 
-  let outfile = changeFileExt(completeCFilePath(conf, AbsoluteFile $cls), ext)
+  let outfile = changeFileExt(completeCFilePath(conf, AbsoluteFile($cls)), ext)
   discard writeRopeIfNotEqual(result, outfile)
 
 proc myClose(graph: ModuleGraph; b: PPassContext, n: PNode): PNode =

compiler/nim.nim

@@ -36,7 +36,7 @@ proc prependCurDir(f: AbsoluteFile): AbsoluteFile =
     if os.isAbsolute(f.string): result = f
     else: result = AbsoluteFile("./" & f.string)
   else:
-    result = AbsoluteFile f
+    result = f
 
 proc processCmdLine(pass: TCmdLinePass, cmd: string; config: ConfigRef) =
   var p = parseopt.initOptParser(cmd)

compiler/options.nim

@@ -514,7 +514,7 @@ proc getOsCacheDir(): string =
   when defined(posix):
     result = getEnv("XDG_CACHE_HOME", getHomeDir() / ".cache") / "nim"
   else:
-    result = getHomeDir() / genSubDir
+    result = getHomeDir() / genSubDir.string
 
 proc getNimcacheDir*(conf: ConfigRef): AbsoluteDir =
   # XXX projectName should always be without a file extension!