clang: error: linker command failed with exit code 1 (use -vto see invocation)

[MuzafarWani]

Here is a makefile I am trying to run.

VISITHOME=/home/muzafar/Downloads/installations

Set this to the version of VisIt that you use

VISITVERSION=3.1.4

Choose one, depending on your system architecture

#VISITARCH=darwin-x86_64
VISITARCH=linux-x86_64

Edit your compiler and its settings

CXX=clang++
CPPFLAGS=
CXXFLAGS=-O3
LDFLAGS=
LIBS=

#################################################################################
SIMDIR=$(VISITHOME)/$(VISITVERSION)/$(VISITARCH)/libsim/V2

SIM_CXXFLAGS=-I$(SIMDIR)/include
SIM_LDFLAGS=-L$(SIMDIR)/lib
SIM_LIBS=-lsimV2 -ldl

SRC=mandelbrot.C patch.C
OBJ=$(SRC:.C=.o)

SRC_BATCH=mandelbrot_batch.C patch.C
OBJ_BATCH=$(SRC_BATCH:.C=.o)

all: mandelbrot mandelbrot_batch

clean:
rm -f mandelbrot mandelbrot_batch $(OBJ)

mandelbrot: $(OBJ)
$(CXX) -o mandelbrot $(OBJ) $(LDFLAGS) $(SIM_LDFLAGS) $(SIM_LIBS) $(LIBS)

mandelbrot_batch: $(OBJ_BATCH)
$(CXX) -o mandelbrot_batch $(OBJ_BATCH) $(LDFLAGS) $(SIM_LDFLAGS) $(SIM_LIBS) $(LIBS)

.C.o:
$(CXX) $(CXXFLAGS) $(SIM_CXXFLAGS) $(CPPFLAGS) -c $<

and the execution details are been shown as below

muzafar@MUZI:~/Downloads/visit_libsim_mandelbrot_example$ make
clang++ -o mandelbrot mandelbrot.o patch.o -L/home/muzafar/Downloads/installations/3.1.4/linux-x86_64/libsim/V2/lib -lsimV2 -ldl
patch.o: file not recognized: file format not recognized
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [Makefile:47: mandelbrot] Error 1