diff --git a/cxx.gemspec b/cxx.gemspec
index 259b29b..fe17c2b 100644
--- a/cxx.gemspec
+++ b/cxx.gemspec
@@ -2,7 +2,7 @@ require 'rake'
 
 include FileUtils
 
-PKG_VERSION = '0.5.0'
+PKG_VERSION = '0.5.1'
 PKG_FILES = FileList[
   'lib/**/*.rb',
   'Rakefile.rb',
diff --git a/lib/cxxproject/buildingblocks/executable.rb b/lib/cxxproject/buildingblocks/executable.rb
index 7ffe110..121ef69 100644
--- a/lib/cxxproject/buildingblocks/executable.rb
+++ b/lib/cxxproject/buildingblocks/executable.rb
@@ -2,7 +2,6 @@
 require 'cxxproject/buildingblocks/has_libraries_mixin'
 require 'cxxproject/buildingblocks/has_sources_mixin'
 require 'cxxproject/buildingblocks/has_includes_mixin'
-require 'cxxproject/utils/process'
 
 require 'tmpdir'
 require 'set'
@@ -46,14 +45,14 @@ def linker_libs_string
 
     def get_executable_name() # relative path
       return @exe_name if @exe_name
-
+      
       parts = [@output_dir]
-
+      
       if @output_dir_abs
         parts = [@output_dir_relPath] if @output_dir_relPath
         parts << 'exes'
       end
-
+      
       parts << "#{@name}#{@tcs[:LINKER][:OUTPUT_ENDING]}"
 
       @exe_name = File.join(parts)
@@ -61,8 +60,8 @@ def get_executable_name() # relative path
     end
 
     def get_task_name() # full path
-      return @task_name if @task_name
-
+      return @task_name if @task_name 
+      
       parts = [@output_dir]
       parts << 'exes' if @output_dir_abs
       parts << "#{@name}#{@tcs[:LINKER][:OUTPUT_ENDING]}"
@@ -70,7 +69,7 @@ def get_task_name() # full path
 
       @task_name = @project_dir + "/" + @task_name unless @output_dir_abs
       @task_name
-    end
+    end    
 
     def collect_unique(array, set)
       ret = []
@@ -125,37 +124,29 @@ def convert_to_rake()
 
       res = typed_file_task Rake::Task::EXECUTABLE, get_task_name => object_multitask do
         Dir.chdir(@project_dir) do
+          cmd = remove_empty_strings_and_join([
+            linker[:COMMAND], # g++
+            linker[:MUST_FLAGS],
+            linker[:FLAGS], # --all_load
+            linker[:EXE_FLAG],
+            get_executable_name, # -o debug/x.exe
+            get_object_filenames, # debug/src/abc.o debug/src/xy.o
+            @linker_script ? "#{@tcs[:LINKER][:SCRIPT]} #{@linker_script}" : "", # -T xy/xy.dld
+            @mapfile ? "#{linker[:MAP_FILE_FLAG]} >#{@output_dir + "/" + @mapfile}" : "", # -Wl,-m6 > xy.map
+            linker[:LIB_PREFIX_FLAGS], # "-Wl,--whole-archive "
+            remove_empty_strings_and_join(calc_linker_lib_string),
+            linker[:LIB_POSTFIX_FLAGS] # "-Wl,--no-whole-archive "
+          ])
 
-          cmd = [linker[:COMMAND]] # g++
-          cmd += linker[:MUST_FLAGS].split(" ")
-          cmd += linker[:FLAGS].split(" ") # --all_load
-          cmd << linker[:EXE_FLAG]
-          cmd << get_executable_name # -o debug/x.exe
-          cmd += @objects # debug/src/abc.o debug/src/xy.o
-          cmd << linker[:SCRIPT] if @linker_script # -T
-          cmd << @linker_script if @linker_script # xy/xy.dld
-          cmd << linker[:MAP_FILE_FLAG] if @mapfile # -Wl,-m6
-          cmd += linker[:LIB_PREFIX_FLAGS].split(" ") # "-Wl,--whole-archive "
-          cmd += calc_linker_lib_string
-          cmd += linker[:LIB_POSTFIX_FLAGS].split(" ") # "-Wl,--no-whole-archive "
-
-          rd, wr = IO.pipe
-          sp = spawn(*cmd,
-            {
-             :out=> @mapfile ? "#{@output_dir}/#{@mapfile}" : :err, # > xy.map
-             :err=>wr
-            })
-
-          # for console print
-          cmd << " >#{@output_dir}/#{@mapfile}" if @mapfile
-
-          consoleOutput = ProcessHelper.readOutput(sp, rd, wr)
           show_command(cmd, "Linking #{get_executable_name}")
+          # TempFile used, because some compilers, e.g. diab, uses ">" for piping to map files:
+          consoleOutput = `#{cmd + " 2>" + get_temp_filename}`
+          consoleOutput.concat(read_file_or_empty_string(get_temp_filename))
           process_console_output(consoleOutput, @tcs[:LINKER][:ERROR_PARSER])
           check_system_command(cmd)
         end
       end
-      res.enhance(transitive_config_files)
+      res.enhance(@config_files)
       res.enhance([@project_dir + "/" + @linker_script]) if @linker_script
       add_output_dir_dependency(get_task_name, res, true)
 
@@ -187,5 +178,9 @@ def run_command(task, command)
       sh "#{command}"
     end
 
+    def get_temp_filename
+      Dir.tmpdir + "/lake.tmp"
+    end
+
   end
 end
diff --git a/lib/cxxproject/buildingblocks/has_sources_mixin.rb b/lib/cxxproject/buildingblocks/has_sources_mixin.rb
index ad223e5..28cc894 100644
--- a/lib/cxxproject/buildingblocks/has_sources_mixin.rb
+++ b/lib/cxxproject/buildingblocks/has_sources_mixin.rb
@@ -1,5 +1,4 @@
 require 'yaml'
-require 'cxxproject/utils/process'
 
 module Cxxproject
   module HasSources
@@ -21,14 +20,14 @@ def set_sources(x)
       @sources = x
       self
     end
-
+    
     def source_patterns
       @source_patterns ||= []
     end
     def set_source_patterns(x)
       @source_patterns = x
       self
-    end
+    end    
 
     def exclude_sources
       @exclude_sources ||= []
@@ -68,7 +67,7 @@ def calc_compiler_strings()
 
       @incArray = local_includes.dup
       @incArray.concat(includes)
-
+      
       all_dependencies.each_with_index do |d,i|
         next if not HasIncludes === d
         next if i == 0
@@ -76,7 +75,7 @@ def calc_compiler_strings()
         next if not prefix
         @incArray.concat(d.includes.map {|inc| File.add_prefix(prefix,inc)})
       end
-
+      
       [:CPP, :C, :ASM].each do |type|
         @include_string[type] = get_include_string(@tcs, type)
         @define_string[type] = get_define_string(@tcs, type)
@@ -84,11 +83,11 @@ def calc_compiler_strings()
     end
 
     def get_include_string(tcs, type)
-      @incArray.uniq.map!{|k| "#{tcs[:COMPILER][type][:INCLUDE_PATH_FLAG]}#{k}"}
+      @incArray.uniq.map!{|k| "#{tcs[:COMPILER][type][:INCLUDE_PATH_FLAG]}#{k}"}.join(" ")
     end
 
     def get_define_string(tcs, type)
-      tcs[:COMPILER][type][:DEFINES].map {|k| "#{tcs[:COMPILER][type][:DEFINE_FLAG]}#{k}"}
+      tcs[:COMPILER][type][:DEFINES].map {|k| "#{tcs[:COMPILER][type][:DEFINE_FLAG]}#{k}"}.join(" ")
     end
 
     def get_object_file(sourceRel)
@@ -160,7 +159,7 @@ def outfileTask.needed?
     def create_object_file_tasks()
 
       sources_to_build = {} # todo: pair!
-
+      
       exclude_files = Set.new
       exclude_sources.each do |p|
         Dir.glob(p).each {|f| exclude_files << f}
@@ -182,13 +181,13 @@ def create_object_file_tasks()
           sources_to_build[f] = tcs4source(p)
         end
       end
-
+        
       obj_tasks = []
       sources_to_build.each do |s, the_tcs|
         obj_task = create_object_file_task(s, the_tcs)
         obj_tasks << obj_task unless obj_task.nil?
       end
-
+      
       obj_tasks
     end
 
@@ -203,40 +202,24 @@ def create_object_file_task(sourceRel, the_tcs)
       @objects << objectRel
       object = File.expand_path(objectRel)
       source = File.expand_path(sourceRel)
-
+      
       depStr = ""
-      if type != :ASM
+      if type != :ASM 
         dep_file = get_dep_file(objectRel)
         depStr = the_tcs[:COMPILER][type][:DEP_FLAGS] + dep_file # -MMD -MF debug/src/abc.o.d
       end
 
+      compiler = the_tcs[:COMPILER][type]
+      cmd = remove_empty_strings_and_join([compiler[:COMMAND], compiler[:COMPILE_FLAGS], depStr, compiler[:FLAGS], # g++ -c -depstr -g3
+        the_tcs == @tcs ? @include_string[type] : get_include_string(the_tcs, type), # -I include
+        the_tcs == @tcs ? @define_string[type] : get_define_string(the_tcs, type), # -DDEBUG
+        compiler[:OBJECT_FILE_FLAG], objectRel, sourceRel # -o abc.o src/abc.cpp
+      ])
       res = typed_file_task Rake::Task::OBJECT, object => source do
-
-        i_array = the_tcs == @tcs ? @include_string[type] : get_include_string(the_tcs, type)
-        d_array = the_tcs == @tcs ? @define_string[type] : get_define_string(the_tcs, type)
-
-        compiler = the_tcs[:COMPILER][type]
-        cmd = [compiler[:COMMAND]]
-        cmd += compiler[:COMPILE_FLAGS].split(" ")
-        cmd += depStr.split(" ")
-        cmd += compiler[:FLAGS].split(" ")
-        cmd += i_array
-        cmd += d_array
-        cmd << compiler[:OBJECT_FILE_FLAG]
-        cmd << objectRel
-        cmd << sourceRel
-
-        rd, wr = IO.pipe
-        sp = spawn(*cmd, {
-            :err=>:out,
-            :out=>wr
-          })
-        consoleOutput = ProcessHelper.readOutput(sp, rd, wr)
-
         show_command(cmd, "Compiling #{sourceRel}")
-        process_console_output(consoleOutput, compiler[:ERROR_PARSER])
+        process_console_output(catch_output(cmd), compiler[:ERROR_PARSER])
         check_system_command(cmd)
-        convert_depfile(dep_file) if type != :ASM
+        convert_depfile(dep_file) if type != :ASM 
       end
       enhance_with_additional_files(res)
       add_output_dir_dependency(object, res, false)
@@ -245,8 +228,8 @@ def create_object_file_task(sourceRel, the_tcs)
     end
 
     def enhance_with_additional_files(task)
+      task.enhance(@config_files)
       task.enhance(file_dependencies)
-      task.enhance(transitive_config_files)
     end
 
     def process_console_output(console_output, ep)
diff --git a/lib/cxxproject/buildingblocks/source_library.rb b/lib/cxxproject/buildingblocks/source_library.rb
index a4eba81..20f96d8 100644
--- a/lib/cxxproject/buildingblocks/source_library.rb
+++ b/lib/cxxproject/buildingblocks/source_library.rb
@@ -2,7 +2,7 @@
 require 'cxxproject/buildingblocks/has_libraries_mixin'
 require 'cxxproject/buildingblocks/has_sources_mixin'
 require 'cxxproject/buildingblocks/has_includes_mixin'
-require 'cxxproject/utils/process'
+require 'cxxproject/utils/string'
 
 module Cxxproject
   class SourceLibrary < BuildingBlock
@@ -54,39 +54,53 @@ def get_task_name() # full path
     #
     def convert_to_rake()
       object_multitask = prepare_tasks_for_objects()
+
       archiver = @tcs[:ARCHIVER]
 
       res = typed_file_task Rake::Task::LIBRARY, get_task_name => object_multitask do
         Dir.chdir(@project_dir) do
 
-          FileUtils.rm(get_archive_name) if File.exists?(get_archive_name)
-          cmd = [archiver[:COMMAND]] # ar
-          cmd += archiver[:ARCHIVE_FLAGS].split(" ")
-          cmd += archiver[:FLAGS].split(" ") # --all_load
-          cmd << get_archive_name # -o debug/x.exe
-          cmd += @objects
-
-          rd, wr = IO.pipe
-          sp = spawn(*cmd,
-            {
-              :err=>:out,
-              :out=>wr
-            })
-
-          consoleOutput = ProcessHelper.readOutput(sp, rd, wr)
-
+          objString = get_object_filenames
+          if objString.length > 8000
+            ar_arrays = StringUtils.splitString(objString,8000,".o ", 1)
+            archs = []
+            for i in 1..ar_arrays.length
+              cmd = remove_empty_strings_and_join([
+                archiver[:COMMAND], # ar
+                archiver[:ARCHIVE_FLAGS], # -rc
+                archiver[:FLAGS],
+                get_archive_name+"_"+i.to_s, # debug/x.a
+                ar_arrays[i-1] # debug/src/abc.o debug/src/xy.o
+                ])
+              show_command(cmd, "Creating #{get_archive_name}, part #{i} of #{ar_arrays.length}")
+              process_console_output(catch_output(cmd), @tcs[:ARCHIVER][:ERROR_PARSER])
+              check_system_command(cmd)
+              archs << get_archive_name+"_"+i.to_s
+            end
+            objString = archs.join(" ")
+          end
+          
+          cmd = remove_empty_strings_and_join([
+            archiver[:COMMAND], # ar
+            archiver[:ARCHIVE_FLAGS], # -rc
+            archiver[:FLAGS],
+            get_archive_name, # debug/x.a
+            objString # debug/src/abc.o debug/src/xy.o
+          ])
           show_command(cmd, "Creating #{get_archive_name}")
-          process_console_output(consoleOutput, @tcs[:ARCHIVER][:ERROR_PARSER])
+          process_console_output(catch_output(cmd), @tcs[:ARCHIVER][:ERROR_PARSER])
           check_system_command(cmd)
         end
       end
-
+      
       enhance_with_additional_files(res)
       add_output_dir_dependency(get_task_name, res, true)
-
+      
       add_grouping_tasks(get_task_name)
 
       setup_rake_dependencies(res)
+        
+     
       return res
     end
 
diff --git a/lib/cxxproject/utils/string.rb b/lib/cxxproject/utils/string.rb
new file mode 100644
index 0000000..869f32a
--- /dev/null
+++ b/lib/cxxproject/utils/string.rb
@@ -0,0 +1,16 @@
+module Cxxproject
+  class StringUtils
+    def self.splitString(str, chunkSize, delim, delimShift = -1)
+      res = []
+      s = str
+      oldPos = 0
+      while s.length > chunkSize + oldPos
+        pos = s.rindex(delim,oldPos+chunkSize)
+        res << s[oldPos..pos+delimShift]
+        oldPos = pos+delim.length
+      end
+      res << s[oldPos..-1]
+      res
+    end  
+  end
+end
diff --git a/spec/building_block_spec.rb b/spec/building_block_spec.rb
index 8ab614e..8b6ddd6 100644
--- a/spec/building_block_spec.rb
+++ b/spec/building_block_spec.rb
@@ -45,8 +45,13 @@
   end
 
   it 'should calc correct transitive_config_files' do
-    lib1 = Cxxproject::SourceLibrary.new('1').set_config_files(['config1']).set_project_dir('.')
-    lib2 = Cxxproject::SourceLibrary.new('2').set_dependencies(['1']).set_config_files(['config2']).set_project_dir('.')
-    lib2.transitive_config_files.should eq(['config2', 'config1'])
+    lib1 = Cxxproject::SourceLibrary.new('1').
+            set_config_files(['config1']).
+            set_project_dir('.')
+    lib2 = Cxxproject::SourceLibrary.new('2').
+            set_dependencies(['1']).
+            set_config_files(['config2']).
+            set_project_dir('.')
+    Set.new(lib2.transitive_config_files).should eq(Set.new(['config2', 'config1']))
   end
 end