@@ -290,7 +290,12 @@ def header_dirs
290290      unbundled  =  header_files . reject  {  |path | vendor_bundle? ( path )  } 
291291      unexcluded  =  unbundled . reject  {  |path | in_exclude_dir? ( path )  } 
292292      files  =  unexcluded . select  {  |path | HPP_EXTENSIONS . include? ( path . extname . downcase )  } 
293-       files . map ( &:dirname ) . uniq 
293+       ret  =  files . map ( &:dirname ) . uniq 
294+       puts  "header_dirs for #{ @base_dir } #{ ret }  
295+       puts  "from header_files: #{ header_files }  
296+       puts  "all items in library dir: #{ Dir . entries ( @arduino_lib_dir ) }  
297+       puts  "all files in dir: #{ Dir . entries ( @base_dir ) }  
298+       ret 
294299    end 
295300
296301    # wrapper for the GCC command 
@@ -328,6 +333,7 @@ def arduino_library_src_dirs(aux_libraries)
328333    # @return [Array<String>] The GCC command-line flags necessary to include those libraries 
329334    def  include_args ( aux_libraries ) 
330335      all_aux_include_dirs  =  arduino_library_src_dirs ( aux_libraries ) 
336+       puts  "all_aux_include_dirs from #{ aux_libraries } \n  #{ all_aux_include_dirs }  
331337      places  =  [ ARDUINO_HEADER_DIR ,  UNITTEST_HEADER_DIR ]  + header_dirs  + all_aux_include_dirs 
332338      places . map  {  |d | "-I#{ d }   } 
333339    end 
@@ -411,6 +417,8 @@ def build_for_test_with_configuration(test_file, aux_libraries, gcc_binary, ci_g
411417      # combine library.properties defs (if existing) with config file. 
412418      # TODO: as much as I'd like to rely only on the properties file(s), I think that would prevent testing 1.0-spec libs 
413419      full_aux_libraries  =  arduino_library_dependencies . nil?  ? aux_libraries  : aux_libaries  + arduino_library_dependencies 
420+       puts  "full_aux_libraries = #{ full_aux_libraries }  
421+       puts  "after aux_libraries = #{ aux_libraries }  
414422      arg_sets  << test_args ( full_aux_libraries ,  ci_gcc_config ) 
415423      arg_sets  << cpp_files_libraries ( full_aux_libraries ) . map ( &:to_s ) 
416424      arg_sets  << [ test_file . to_s ] 
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