diff --git a/lib/atc/Makefile.mingw32-cross b/lib/atc/Makefile.mingw32-cross
new file mode 100644
index 0000000000..706c8cfefc
--- /dev/null
+++ b/lib/atc/Makefile.mingw32-cross
@@ -0,0 +1,148 @@
+# library build -*- makefile -*-
+SHELL = /bin/sh
+
+# ------ FILES ------
+
+SRC = ATC_HardyKernel.cpp \
+ATC_Transfer.cpp \
+ATC_TransferHardy.cpp \
+ATC_TransferThermal.cpp \
+ATC_TransferUtility.cpp \
+AtomicRegulator.cpp \
+ElasticTimeIntegrator.cpp \
+ElectronFlux.cpp \
+ElectronHeatCapacity.cpp \
+ElectronHeatFlux.cpp \
+ElectronPhononExchange.cpp \
+ExtrinsicModel.cpp \
+ExtrinsicModelTwoTemperature.cpp \
+FE_Element.cpp \
+FE_Engine.cpp \
+FE_Mesh.cpp \
+FieldEulerIntegrator.cpp \
+ImplicitSolveOperator.cpp \
+Kinetostat.cpp \
+LammpsInterface.cpp \
+Material.cpp \
+Matrix.cpp \
+OutputManager.cpp \
+PhysicsModelThermal.cpp \
+PhysicsModelTwoTemperature.cpp \
+PrescribedDataManager.cpp \
+Solver.cpp \
+Thermostat.cpp \
+TimeFilter.cpp \
+TimeIntegrator.cpp \
+Vector.cpp \
+XT_Function.cpp
+
+INC = Array2D.h \
+Array.h \
+ATC_Error.h \
+ATC_HardyKernel.h \
+ATC_Transfer.h \
+ATC_TransferHardy.h \
+ATC_TransferThermal.h \
+ATC_TypeDefs.h \ \
+AtomicRegulator.h \
+CG.h \
+CloneVector.h \
+DenseMatrix.h \
+DenseVector.h \
+DiagonalMatrix.h \
+ElasticTimeIntegrator.h \
+ElectronFlux.h \
+ElectronHeatCapacity.h \
+ElectronHeatFlux.h \
+ElectronPhononExchange.h \
+ExtrinsicModel.h \
+ExtrinsicModelTwoTemperature.h \
+FE_Element.h \
+FE_Engine.h \
+FE_Mesh.h \
+FieldEulerIntegrator.h \
+GMRES.h \
+ImplicitSolveOperator.h \
+Kinetostat.h \
+LammpsInterface.h \
+Material.h \
+MatrixDef.h \
+Matrix.h \
+MatrixLibrary.h \
+OutputManager.h \
+PhysicsModel.h \
+PhysicsModelThermal.h \
+PhysicsModelTwoTemperature.h \
+PrescribedDataManager.h \
+Quadrature.h \
+Solver.h \
+SparseMatrix.h \
+SparseMatrix-inl.h \
+SparseVector.h \
+SparseVector-inl.h \
+StringManip.h \
+Thermostat.h \
+TimeFilter.h \
+TimeIntegrator.h \
+Utility.h \
+Vector.h \
+XT_Function.h
+
+# ------ DEFINITIONS ------
+# which file will be copied to Makefile.lammps
+
+EXTRAMAKE = Makefile.lammps.linalg
+
+DIR = Obj_mingw32/
+LIB = $(DIR)libatc.a
+OBJ = $(SRC:%.cpp=$(DIR)%.o)
+
+# ------ SETTINGS ------
+
+# include any MPI settings needed for the ATC library to build with
+# the same MPI library that LAMMPS is built with
+
+CC =		i686-w64-mingw32-g++
+CCFLAGS =	-I../../src -I../../src/STUBS -DMPICH_IGNORE_CXX_SEEK	\
+		-O3 -march=i686 -mtune=generic -mfpmath=387 -mpc64	\
+                -ffast-math -funroll-loops -fstrict-aliasing 	\
+		-Wno-uninitialized
+ARCHIVE =	i686-w64-mingw32-ar
+ARCHFLAG =	-rcs
+DEPFLAGS =      -M
+LINK =         	i686-w64-mingw32-g++
+LINKFLAGS =	-O
+USRLIB =
+SYSLIB =
+
+# ------ MAKE PROCEDURE ------
+
+default: $(DIR) $(LIB) Makefile.lammps
+
+$(DIR):
+	mkdir $(DIR)
+
+Makefile.lammps:
+	@cp $(EXTRAMAKE) Makefile.lammps
+
+$(LIB): 	$(OBJ)
+	$(ARCHIVE) $(ARFLAGS) $(LIB) $(OBJ)
+	@cp $(EXTRAMAKE) Makefile.lammps
+
+# ------ COMPILE RULES ------
+
+$(DIR)%.o:%.cpp
+	$(CC) $(CCFLAGS) -c $< -o $@
+$(DIR)%.d:%.cpp
+	$(CC) $(CCFLAGS) $(DEPFLAGS) $< > $@		
+
+# ------ DEPENDENCIES ------
+
+DEPENDS = $(OBJ:.o=.d)
+
+# ------ CLEAN ------
+
+clean:
+	rm $(DIR)*.o $(DIR)*.d *~ $(LIB)
+
+sinclude $(DEPENDS)
diff --git a/lib/atc/Makefile.mingw64-cross b/lib/atc/Makefile.mingw64-cross
new file mode 100644
index 0000000000..52672c4963
--- /dev/null
+++ b/lib/atc/Makefile.mingw64-cross
@@ -0,0 +1,148 @@
+# library build -*- makefile -*-
+SHELL = /bin/sh
+
+# ------ FILES ------
+
+SRC = ATC_HardyKernel.cpp \
+ATC_Transfer.cpp \
+ATC_TransferHardy.cpp \
+ATC_TransferThermal.cpp \
+ATC_TransferUtility.cpp \
+AtomicRegulator.cpp \
+ElasticTimeIntegrator.cpp \
+ElectronFlux.cpp \
+ElectronHeatCapacity.cpp \
+ElectronHeatFlux.cpp \
+ElectronPhononExchange.cpp \
+ExtrinsicModel.cpp \
+ExtrinsicModelTwoTemperature.cpp \
+FE_Element.cpp \
+FE_Engine.cpp \
+FE_Mesh.cpp \
+FieldEulerIntegrator.cpp \
+ImplicitSolveOperator.cpp \
+Kinetostat.cpp \
+LammpsInterface.cpp \
+Material.cpp \
+Matrix.cpp \
+OutputManager.cpp \
+PhysicsModelThermal.cpp \
+PhysicsModelTwoTemperature.cpp \
+PrescribedDataManager.cpp \
+Solver.cpp \
+Thermostat.cpp \
+TimeFilter.cpp \
+TimeIntegrator.cpp \
+Vector.cpp \
+XT_Function.cpp
+
+INC = Array2D.h \
+Array.h \
+ATC_Error.h \
+ATC_HardyKernel.h \
+ATC_Transfer.h \
+ATC_TransferHardy.h \
+ATC_TransferThermal.h \
+ATC_TypeDefs.h \ \
+AtomicRegulator.h \
+CG.h \
+CloneVector.h \
+DenseMatrix.h \
+DenseVector.h \
+DiagonalMatrix.h \
+ElasticTimeIntegrator.h \
+ElectronFlux.h \
+ElectronHeatCapacity.h \
+ElectronHeatFlux.h \
+ElectronPhononExchange.h \
+ExtrinsicModel.h \
+ExtrinsicModelTwoTemperature.h \
+FE_Element.h \
+FE_Engine.h \
+FE_Mesh.h \
+FieldEulerIntegrator.h \
+GMRES.h \
+ImplicitSolveOperator.h \
+Kinetostat.h \
+LammpsInterface.h \
+Material.h \
+MatrixDef.h \
+Matrix.h \
+MatrixLibrary.h \
+OutputManager.h \
+PhysicsModel.h \
+PhysicsModelThermal.h \
+PhysicsModelTwoTemperature.h \
+PrescribedDataManager.h \
+Quadrature.h \
+Solver.h \
+SparseMatrix.h \
+SparseMatrix-inl.h \
+SparseVector.h \
+SparseVector-inl.h \
+StringManip.h \
+Thermostat.h \
+TimeFilter.h \
+TimeIntegrator.h \
+Utility.h \
+Vector.h \
+XT_Function.h
+
+# ------ DEFINITIONS ------
+# which file will be copied to Makefile.lammps
+
+EXTRAMAKE = Makefile.lammps.linalg
+
+DIR = Obj_mingw64/
+LIB = $(DIR)libatc.a
+OBJ = $(SRC:%.cpp=$(DIR)%.o)
+
+# ------ SETTINGS ------
+
+# include any MPI settings needed for the ATC library to build with
+# the same MPI library that LAMMPS is built with
+
+CC =		  x86_64-w64-mingw32-g++
+CCFLAGS =	-I../../src -I../../src/STUBS -DMPICH_IGNORE_CXX_SEEK	\
+		-O3 -march=core2 -mtune=core2 -mpc64 -msse2    \
+                -ffast-math -funroll-loops -fstrict-aliasing		\
+		-Wno-uninitialized
+ARCHIVE =	x86_64-w64-mingw32-ar
+ARCHFLAG =	-rcs
+DEPFLAGS =      -M
+LINK =         	x86_64-w64-mingw32-g++
+LINKFLAGS =	-O
+USRLIB =
+SYSLIB =
+
+# ------ MAKE PROCEDURE ------
+
+default: $(DIR) $(LIB) Makefile.lammps
+
+$(DIR):
+	mkdir $(DIR)
+
+Makefile.lammps:
+	@cp $(EXTRAMAKE) Makefile.lammps
+
+$(LIB): 	$(OBJ)
+	$(ARCHIVE) $(ARFLAGS) $(LIB) $(OBJ)
+	@cp $(EXTRAMAKE) Makefile.lammps
+
+# ------ COMPILE RULES ------
+
+$(DIR)%.o:%.cpp
+	$(CC) $(CCFLAGS) -c $< -o $@
+$(DIR)%.d:%.cpp
+	$(CC) $(CCFLAGS) $(DEPFLAGS) $< > $@		
+
+# ------ DEPENDENCIES ------
+
+DEPENDS = $(OBJ:.o=.d)
+
+# ------ CLEAN ------
+
+clean:
+	rm $(DIR)*.o $(DIR)*.d *~ $(LIB)
+
+sinclude $(DEPENDS)
diff --git a/src/USER-ATC/Install.sh b/src/USER-ATC/Install.sh
index 197e94e29d..23a0781e24 100755
--- a/src/USER-ATC/Install.sh
+++ b/src/USER-ATC/Install.sh
@@ -35,7 +35,7 @@ if (test $1 = 1) then
   if (test -e ../Makefile.package) then
     sed -i -e 's/[^ \t]*atc[^ \t]* //' ../Makefile.package
     sed -i -e 's|^PKG_INC =[ \t]*|&-I../../lib/atc |' ../Makefile.package
-    sed -i -e 's|^PKG_PATH =[ \t]*|&-L../../lib/atc |' ../Makefile.package
+    sed -i -e 's|^PKG_PATH =[ \t]*|&-L../../lib/atc$(LIBOBJDIR) |' ../Makefile.package
     sed -i -e 's|^PKG_LIB =[ \t]*|&-latc |' ../Makefile.package
     sed -i -e 's|^PKG_SYSINC =[ \t]*|&$(user-atc_SYSINC) |' ../Makefile.package
     sed -i -e 's|^PKG_SYSLIB =[ \t]*|&$(user-atc_SYSLIB) |' ../Makefile.package