did not compile without these statements

code/Makefile

@@ -626,6 +626,7 @@ IO.o:                          IO.f90 \
 DAMASK_interface.o:            spectral_interface.f90 \
                                $(wildcard DAMASK_FEM_interface.f90) \
                                prec.o
+	$(PREFIX) $(COMPILERNAME) $(COMPILE) -c $(INTERFACENAME) -o DAMASK_interface.o $(SUFFIX)
 
 prec.o:                        prec.f90 \
                                system_routines.o

code/spectral_interface.f90

@@ -264,6 +264,8 @@ end function storeWorkingDirectory
 !> @brief simply returns the private string workingDir 
 !--------------------------------------------------------------------------------------------------
 character(len=1024) function getSolverWorkingDirectoryName()
+ use system_routines, only: &
+   getCWD2
 
  implicit none
  getSolverWorkingDirectoryName = workingDirectory
@@ -302,6 +304,8 @@ end function getSolverJobName
 !> @brief basename of geometry file with extension from command line arguments
 !--------------------------------------------------------------------------------------------------
 character(len=1024) function getGeometryFile(geometryParameter)
+ use system_routines, only: &
+   getCWD2
 
  implicit none
  character(len=1024), intent(in) :: &
@@ -334,6 +338,8 @@ end function getGeometryFile
 !> @brief relative path of loadcase from command line arguments
 !--------------------------------------------------------------------------------------------------
 character(len=1024) function getLoadCaseFile(loadCaseParameter)
+ use system_routines, only: &
+   getCWD2
 
  implicit none
  character(len=1024), intent(in) :: &