LinuxQuestions.org - Makefile works on ubuntu 12.04 LTS, but not on redhat

I wrote a multithreading program on my Ubuntu 12.04 and now want to run it on a SGI cluster running Red Hat Enterprise Linux Server release 6.3. It runs fine on my ubuntu, but has the usual

makefile:1: * missing separator. Stop.

error when running make on the server machine.

here is my makefile:

Code:

HDF5DIR = /cfel/common

#HDF5DIR = /usr





#INC_DIR = /usr/local/include

#LIB_DIR = /usr/local/lib

INC_DIR = /cfel/common/include

LIB_DIR = /cfel/common/lib

LIBS = -lm -lstdc++ -lpthread -lhdf5 -lfftw3 -lfftw3f -lfftw3f_threads -        lfftw3_threads



SHELL      = /bin/sh



CC      = g++

CFLAGS      = -g -O3 -ffast-math -mtune=native -msse3 -msse4

C_FLAGS    = -I$(INC_DIR) -I$(HDF5DIR)/include $(CFLAGS) -c



LD      = g++

LDFLAGS    = -g -O3 -ffast-math -mtune=native -msse3 -msse4

$(LDFLAGS)

LD_FLAGS    = -L$(LIB_DIR) -L$(HDF5DIR)/lib $(LIBS) $(LDFLAGS)





OBJ_FILES  = phaseit3d.o global.o settings.o data2d.o data3d.o fftwData.o worker.o

EXE_FILE    = phaseit3d





.cpp.o : Makefile $*.h

    $(CC) $(C_FLAGS) $*.cpp -o $*.o



all : $(OBJ_FILES) Makefile

    $(LD) $(OBJ_FILES) $(LD_FLAGS) -o $(EXE_FILE)



clean : 

    rm $(OBJ_FILES)

Can anyone spot my mistake? Any differences between those distributions? I used tabs in the important places, and the error says it's on line 1, very strange