v0.2.2

lib/rscons/builders/program.rb

@@ -17,6 +17,7 @@ module Rscons
     def run(target, sources, cache, env, vars = {})
       # build sources to linkable objects
       objects = env.build_sources(sources, [env['OBJSUFFIX'], env['LIBSUFFIX']].flatten, cache, vars)
+      return false unless objects
       ld = if env["LD"]
              env["LD"]
            elsif sources.find {|s| s.has_suffix?(env["DSUFFIX"])}

lib/rscons/environment.rb

@@ -50,7 +50,7 @@ module Rscons
     # is given, the Environment object is yielded to the block and when the
     # block returns, the {#process} method is automatically called.
     def clone(variables = {})
-      env = Environment.new()
+      env = self.class.new
       @builders.each do |builder_name, builder|
         env.add_builder(builder)
       end

lib/rscons/varset.rb

@@ -72,7 +72,7 @@ module Rscons
           elsif varval.is_a?(Array)
             varval.map {|vv| expand_varref("#{prefix}#{vv}#{suffix}")}.flatten
           else
-            raise "I do not know how to expand a variable reference to a #{varval.class.name}"
+            raise "I do not know how to expand a variable reference to a #{varval.class.name} (from #{varname.inspect} => #{@vars[varname].inspect})"
           end
         else
           varref

lib/rscons/version.rb

@@ -1,4 +1,4 @@
 module Rscons
   # gem version
-  VERSION = "0.2.0"
+  VERSION = "0.2.2"
 end