No rule to make target '-L/usr/local/lib'

Question

I am facing a problem while trying to link opencv to CPP project generated by Matlab Coder. In the auto generated Makefile of the project, I added pkg-config --cflags opencv to CFLAGS and pkg-config --libs opencv to LIBS (opencv 3.4), which then gives the error "No rule to make target '-L/usr/local/lib'". Any ideas how to fix ther error?

PRODUCT_NAME              = runeef
MAKEFILE                  = runeef_rtw.mk
MATLAB_ROOT               = /usr/local/Polyspace/R2020a
MATLAB_BIN                = /usr/local/Polyspace/R2020a/bin
MATLAB_ARCH_BIN           = $(MATLAB_BIN)/glnxa64
MASTER_ANCHOR_DIR         = 
START_DIR                 = /home/dell/Documents/purefusion/codegen/exe/runeef
TGT_FCN_LIB               = ISO_C++11
SOLVER_OBJ                = 
CLASSIC_INTERFACE         = 0
MODEL_HAS_DYNAMICALLY_LOADED_SFCNS = 
RELATIVE_PATH_TO_ANCHOR   = .
C_STANDARD_OPTS           = -fwrapv -ansi -pedantic -Wno-long-long
CPP_STANDARD_OPTS         = -fwrapv -std=c++11 -pedantic

###########################################################################
## TOOLCHAIN SPECIFICATIONS
###########################################################################

# Toolchain Name:          GNU gcc/g++ | gmake (64-bit Linux)
# Supported Version(s):    
# ToolchainInfo Version:   2020a
# Specification Revision:  1.0
# 
#-------------------------------------------
# Macros assumed to be defined elsewhere
#-------------------------------------------

# C_STANDARD_OPTS
# CPP_STANDARD_OPTS

#-----------
# MACROS
#-----------

WARN_FLAGS         = -Wall -W -Wwrite-strings -Winline -Wstrict-prototypes -Wnested-externs -Wpointer-arith -Wcast-align
WARN_FLAGS_MAX     = $(WARN_FLAGS) -Wcast-qual -Wshadow
CPP_WARN_FLAGS     = -Wall -W -Wwrite-strings -Winline -Wpointer-arith -Wcast-align
CPP_WARN_FLAGS_MAX = $(CPP_WARN_FLAGS) -Wcast-qual -Wshadow

TOOLCHAIN_SRCS = 
TOOLCHAIN_INCS = 
TOOLCHAIN_LIBS = 

#------------------------
# BUILD TOOL COMMANDS
#------------------------

# C Compiler: GNU C Compiler
CC = gcc

# Linker: GNU Linker
LD = g++

# C++ Compiler: GNU C++ Compiler
CPP = g++

# C++ Linker: GNU C++ Linker
CPP_LD = g++

# Archiver: GNU Archiver
AR = ar

# MEX Tool: MEX Tool
MEX_PATH = $(MATLAB_ARCH_BIN)
MEX = "$(MEX_PATH)/mex"

# Download: Download
DOWNLOAD =

# Execute: Execute
EXECUTE = $(PRODUCT)

# Builder: GMAKE Utility
MAKE_PATH = %MATLAB%/bin/glnxa64
MAKE = "$(MAKE_PATH)/gmake"


#-------------------------
# Directives/Utilities
#-------------------------

CDEBUG              = -g
C_OUTPUT_FLAG       = -o
LDDEBUG             = -g
OUTPUT_FLAG         = -o
CPPDEBUG            = -g
CPP_OUTPUT_FLAG     = -o
CPPLDDEBUG          = -g
OUTPUT_FLAG         = -o
ARDEBUG             =
STATICLIB_OUTPUT_FLAG =
MEX_DEBUG           = -g
RM                  = @rm -f
ECHO                = @echo
MV                  = @mv
RUN                 =

#--------------------------------------
# "Faster Runs" Build Configuration
#--------------------------------------

ARFLAGS              = ruvs
CFLAGS               = $(shell pkg-config --cflags opencv) -c $(C_STANDARD_OPTS)  -fPIC \
                       -O3 -fno-loop-optimize -fno-aggressive-loop-optimizations
CPPFLAGS             = $(shell pkg-config --cflags opencv) -c $(CPP_STANDARD_OPTS) -fPIC \
                       -O3 -fno-loop-optimize -fno-aggressive-loop-optimizations
CPP_LDFLAGS          = -Wl,-rpath,"$(MATLAB_ARCH_BIN)",-L"$(MATLAB_ARCH_BIN)"
CPP_SHAREDLIB_LDFLAGS  = -shared -Wl,-rpath,"$(MATLAB_ARCH_BIN)",-L"$(MATLAB_ARCH_BIN)" -Wl,--no-undefined
DOWNLOAD_FLAGS       =
EXECUTE_FLAGS        =
LDFLAGS              = -Wl,-rpath,"$(MATLAB_ARCH_BIN)",-L"$(MATLAB_ARCH_BIN)"
MEX_CPPFLAGS         =
MEX_CPPLDFLAGS       =
MEX_CFLAGS           =
MEX_LDFLAGS          =
MAKE_FLAGS           = -f $(MAKEFILE)
SHAREDLIB_LDFLAGS    = -shared -Wl,-rpath,"$(MATLAB_ARCH_BIN)",-L"$(MATLAB_ARCH_BIN)" -Wl,--no-undefined



###########################################################################
## OUTPUT INFO
###########################################################################

PRODUCT = /home/dell/Documents/purefusion/runeef
PRODUCT_TYPE = "executable"
BUILD_TYPE = "Executable"

###########################################################################
## INCLUDE PATHS
###########################################################################

INCLUDES_BUILDINFO = -I$(START_DIR) -I/home/dell/Documents/purefusion -I$(MATLAB_ROOT)/extern/include -I$(MATLAB_ROOT)/toolbox/vision/builtins/src/ocv/include -I$(MATLAB_ROOT)/toolbox/vision/builtins/src/ocvcg/opencv/include -I/home/dell/Documents/purefusion/codegen/exe 

INCLUDES = $(INCLUDES_BUILDINFO)

###########################################################################
## DEFINES
###########################################################################

DEFINES_CUSTOM = 
DEFINES_STANDARD = -DMODEL=runeef

DEFINES = $(DEFINES_CUSTOM) $(DEFINES_STANDARD)

###########################################################################
## SOURCE FILES
###########################################################################

SRCS = $(START_DIR)/rt_nonfinite.cpp $(START_DIR)/rtGetNaN.cpp $(START_DIR)/rtGetInf.cpp $(MATLAB_ROOT)/toolbox/vision/builtins/src/ocv/detectFASTCore.cpp $(MATLAB_ROOT)/toolbox/vision/builtins/src/ocv/cgCommon.cpp $(MATLAB_ROOT)/toolbox/vision/builtins/src/ocv/extractFreakCore.cpp $(MATLAB_ROOT)/toolbox/vision/builtins/src/ocv/mwfreak.cpp /home/dell/Documents/purefusion/codegen/exe/main.cpp $(START_DIR)/runeef_rtwutil.cpp $(START_DIR)/runeef_data.cpp $(START_DIR)/runeef_initialize.cpp $(START_DIR)/runeef_terminate.cpp $(START_DIR)/runeef.cpp $(START_DIR)/colon.cpp $(START_DIR)/string1.cpp $(START_DIR)/rgb2gray.cpp $(START_DIR)/abs.cpp $(START_DIR)/histeq.cpp $(START_DIR)/minOrMax.cpp $(START_DIR)/sum.cpp $(START_DIR)/imhist.cpp $(START_DIR)/bsxfun.cpp $(START_DIR)/cornerPoints_cg.cpp $(START_DIR)/FeaturePointsImpl.cpp $(START_DIR)/repmat.cpp $(START_DIR)/extractFeatures.cpp $(START_DIR)/mod.cpp $(START_DIR)/eef.cpp $(START_DIR)/remapFun.cpp $(START_DIR)/prod.cpp $(START_DIR)/imfilter.cpp $(START_DIR)/padarray.cpp $(START_DIR)/multiscaleBlendingColor.cpp $(START_DIR)/gaussian_pyramid.cpp $(START_DIR)/laplacian_pyramid.cpp $(START_DIR)/upsample.cpp $(START_DIR)/reconstruct_laplacian_pyramid.cpp $(START_DIR)/robustNormalization.cpp $(START_DIR)/sort.cpp $(START_DIR)/sortIdx.cpp

ALL_SRCS = $(SRCS)

###########################################################################
## OBJECTS
###########################################################################

OBJS = rt_nonfinite.o rtGetNaN.o rtGetInf.o detectFASTCore.o cgCommon.o extractFreakCore.o mwfreak.o main.o runeef_rtwutil.o runeef_data.o runeef_initialize.o runeef_terminate.o runeef.o colon.o string1.o rgb2gray.o abs.o histeq.o minOrMax.o sum.o imhist.o bsxfun.o cornerPoints_cg.o FeaturePointsImpl.o repmat.o extractFeatures.o mod.o eef.o remapFun.o prod.o imfilter.o padarray.o multiscaleBlendingColor.o gaussian_pyramid.o laplacian_pyramid.o upsample.o reconstruct_laplacian_pyramid.o robustNormalization.o sort.o sortIdx.o

ALL_OBJS = $(OBJS)

###########################################################################
## PREBUILT OBJECT FILES
###########################################################################

PREBUILT_OBJS = 

###########################################################################
## LIBRARIES
###########################################################################

LIBS = $(MATLAB_ROOT)/bin/glnxa64/libmwjpegreader.so $(MATLAB_ROOT)/bin/glnxa64/libopencv_calib3d.so.3.4 $(MATLAB_ROOT)/bin/glnxa64/libopencv_core.so.3.4 $(MATLAB_ROOT)/bin/glnxa64/libopencv_features2d.so.3.4 $(MATLAB_ROOT)/bin/glnxa64/libopencv_flann.so.3.4 $(MATLAB_ROOT)/bin/glnxa64/libopencv_imgproc.so.3.4 $(MATLAB_ROOT)/bin/glnxa64/libopencv_ml.so.3.4 $(MATLAB_ROOT)/bin/glnxa64/libopencv_objdetect.so.3.4 $(MATLAB_ROOT)/bin/glnxa64/libopencv_video.so.3.4 $(MATLAB_ROOT)/bin/glnxa64/libopencv_cudaarithm.so.3.4 $(MATLAB_ROOT)/bin/glnxa64/libopencv_cudabgsegm.so.3.4 $(MATLAB_ROOT)/bin/glnxa64/libopencv_cudafeatures2d.so.3.4 $(MATLAB_ROOT)/bin/glnxa64/libopencv_cudafilters.so.3.4 $(MATLAB_ROOT)/bin/glnxa64/libopencv_cudaimgproc.so.3.4 $(MATLAB_ROOT)/bin/glnxa64/libopencv_cudalegacy.so.3.4 $(MATLAB_ROOT)/bin/glnxa64/libopencv_cudaobjdetect.so.3.4 $(MATLAB_ROOT)/bin/glnxa64/libopencv_cudaoptflow.so.3.4 $(MATLAB_ROOT)/bin/glnxa64/libopencv_cudastereo.so.3.4 $(MATLAB_ROOT)/bin/glnxa64/libopencv_cudawarping.so.3.4 $(MATLAB_ROOT)/bin/glnxa64/libopencv_cudev.so.3.4 $(shell pkg-config --libs opencv)
#/usr/local/lib/libopencv_core.so.4.5.1 /usr/local/lib/libopencv_imgcodecs.so.4.5.1 /usr/local/lib/libopencv_highgui.so.4.5.1

###########################################################################
## SYSTEM LIBRARIES
###########################################################################

SYSTEM_LIBS =  -L"$(MATLAB_ROOT)/bin/glnxa64" -lmwrgb2gray_tbb -lmwgetnumcores -lmwtbbhist -lmwgrayxform_tbb -lmwgrayto8 -lmwippfilter -lmwipp -lmwimfilter -lmwnhood -lm -lstdc++ 

###########################################################################
## ADDITIONAL TOOLCHAIN FLAGS
###########################################################################

#---------------
# C Compiler
#---------------

CFLAGS_ = -Wno-variadic-macros -Wno-variadic-macros
CFLAGS_BASIC = $(DEFINES) $(INCLUDES)

CFLAGS += $(CFLAGS_) $(CFLAGS_BASIC) 

#-----------------
# C++ Compiler
#-----------------

CPPFLAGS_ = -Wno-variadic-macros -Wno-variadic-macros
CPPFLAGS_BASIC = $(DEFINES) $(INCLUDES)

CPPFLAGS += $(CPPFLAGS_) $(CPPFLAGS_BASIC)

###########################################################################
## INLINED COMMANDS
###########################################################################

###########################################################################
## PHONY TARGETS
###########################################################################

.PHONY : all build buildobj clean info prebuild download execute


all : build
    @echo "### Successfully generated all binary outputs."


build : prebuild $(PRODUCT)


buildobj : prebuild $(OBJS) $(PREBUILT_OBJS) $(LIBS) 
    @echo "### Successfully generated all binary outputs."


prebuild : 


download : $(PRODUCT)


execute : download
    @echo "### Invoking postbuild tool "Execute" ..."
    $(EXECUTE) $(EXECUTE_FLAGS)
    @echo "### Done invoking postbuild tool."


###########################################################################
## FINAL TARGET
###########################################################################

#-------------------------------------------
# Create a standalone executable            
#-------------------------------------------

$(PRODUCT) : $(OBJS) $(PREBUILT_OBJS) $(LIBS)
    @echo "### Creating standalone executable "$(PRODUCT)" ..."
    $(CPP_LD) $(CPP_LDFLAGS) -o $(PRODUCT) $(OBJS) -Wl,--start-group $(LIBS) -Wl,--end-group $(SYSTEM_LIBS) $(TOOLCHAIN_LIBS) 
    @echo "### Created: $(PRODUCT)"


###########################################################################
## INTERMEDIATE TARGETS
###########################################################################

#---------------------
# SOURCE-TO-OBJECT
#---------------------

%.o : %.c
    $(CC) $(CFLAGS) -o "$@" "$<"


%.o : %.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


%.o : $(RELATIVE_PATH_TO_ANCHOR)/%.c
    $(CC) $(CFLAGS) -o "$@" "$<"


%.o : $(RELATIVE_PATH_TO_ANCHOR)/%.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


%.o : $(START_DIR)/%.c
    $(CC) $(CFLAGS) -o "$@" "$<"


%.o : $(START_DIR)/%.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


%.o : /home/dell/Documents/purefusion/%.c
    $(CC) $(CFLAGS) -o "$@" "$<"


%.o : /home/dell/Documents/purefusion/%.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


%.o : $(MATLAB_ROOT)/toolbox/vision/builtins/src/ocv/%.c
    $(CC) $(CFLAGS) -o "$@" "$<"


%.o : $(MATLAB_ROOT)/toolbox/vision/builtins/src/ocv/%.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


%.o : /home/dell/Documents/purefusion/codegen/exe/%.c
    $(CC) $(CFLAGS) -o "$@" "$<"


%.o : /home/dell/Documents/purefusion/codegen/exe/%.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


rt_nonfinite.o : $(START_DIR)/rt_nonfinite.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


rtGetNaN.o : $(START_DIR)/rtGetNaN.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


rtGetInf.o : $(START_DIR)/rtGetInf.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


detectFASTCore.o : $(MATLAB_ROOT)/toolbox/vision/builtins/src/ocv/detectFASTCore.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


cgCommon.o : $(MATLAB_ROOT)/toolbox/vision/builtins/src/ocv/cgCommon.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


extractFreakCore.o : $(MATLAB_ROOT)/toolbox/vision/builtins/src/ocv/extractFreakCore.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


mwfreak.o : $(MATLAB_ROOT)/toolbox/vision/builtins/src/ocv/mwfreak.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


main.o : /home/dell/Documents/purefusion/codegen/exe/main.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


runeef_rtwutil.o : $(START_DIR)/runeef_rtwutil.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


runeef_data.o : $(START_DIR)/runeef_data.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


runeef_initialize.o : $(START_DIR)/runeef_initialize.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


runeef_terminate.o : $(START_DIR)/runeef_terminate.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


runeef.o : $(START_DIR)/runeef.cpp
    $(CPP) $(CPPFLAGS)  -o "$@" "$<"


colon.o : $(START_DIR)/colon.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"

string1.o : $(START_DIR)/string1.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


rgb2gray.o : $(START_DIR)/rgb2gray.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


abs.o : $(START_DIR)/abs.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


histeq.o : $(START_DIR)/histeq.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


minOrMax.o : $(START_DIR)/minOrMax.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


sum.o : $(START_DIR)/sum.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


imhist.o : $(START_DIR)/imhist.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


bsxfun.o : $(START_DIR)/bsxfun.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


cornerPoints_cg.o : $(START_DIR)/cornerPoints_cg.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


FeaturePointsImpl.o : $(START_DIR)/FeaturePointsImpl.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


repmat.o : $(START_DIR)/repmat.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


extractFeatures.o : $(START_DIR)/extractFeatures.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


mod.o : $(START_DIR)/mod.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


eef.o : $(START_DIR)/eef.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


remapFun.o : $(START_DIR)/remapFun.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


prod.o : $(START_DIR)/prod.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


imfilter.o : $(START_DIR)/imfilter.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


padarray.o : $(START_DIR)/padarray.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


multiscaleBlendingColor.o : $(START_DIR)/multiscaleBlendingColor.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


gaussian_pyramid.o : $(START_DIR)/gaussian_pyramid.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


laplacian_pyramid.o : $(START_DIR)/laplacian_pyramid.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


upsample.o : $(START_DIR)/upsample.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


reconstruct_laplacian_pyramid.o : $(START_DIR)/reconstruct_laplacian_pyramid.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


robustNormalization.o : $(START_DIR)/robustNormalization.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


sort.o : $(START_DIR)/sort.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


sortIdx.o : $(START_DIR)/sortIdx.cpp
    $(CPP) $(CPPFLAGS) -o "$@" "$<"


###########################################################################
## DEPENDENCIES
###########################################################################

$(ALL_OBJS) : rtw_proj.tmw $(MAKEFILE)


clean : 
    $(ECHO) "### Deleting all derived files..."
    $(RM) $(PRODUCT)
    $(RM) $(ALL_OBJS)
    $(ECHO) "### Deleted all derived files."

And a part of the corresponding messages after make command.

g++ -I/usr/local/include/opencv -I/usr/local/include -c -fwrapv -std=c++11 -pedantic -fPIC -O3 -fno-loop-optimize -fno-aggressive-loop-optimizations -Wno-variadic-macros -Wno-variadic-macros  -DMODEL=runeef -I/home/dell/Documents/purefusion/codegen/exe/runeef -I/home/dell/Documents/purefusion -I/usr/local/Polyspace/R2020a/extern/include -I/usr/local/Polyspace/R2020a/toolbox/vision/builtins/src/ocv/include -I/usr/local/Polyspace/R2020a/toolbox/vision/builtins/src/ocvcg/opencv/include -I/home/dell/Documents/purefusion/codegen/exe  -o "reconstruct_laplacian_pyramid.o" "/home/dell/Documents/purefusion/codegen/exe/runeef/reconstruct_laplacian_pyramid.cpp"
g++ -I/usr/local/include/opencv -I/usr/local/include -c -fwrapv -std=c++11 -pedantic -fPIC -O3 -fno-loop-optimize -fno-aggressive-loop-optimizations -Wno-variadic-macros -Wno-variadic-macros  -DMODEL=runeef -I/home/dell/Documents/purefusion/codegen/exe/runeef -I/home/dell/Documents/purefusion -I/usr/local/Polyspace/R2020a/extern/include -I/usr/local/Polyspace/R2020a/toolbox/vision/builtins/src/ocv/include -I/usr/local/Polyspace/R2020a/toolbox/vision/builtins/src/ocvcg/opencv/include -I/home/dell/Documents/purefusion/codegen/exe  -o "robustNormalization.o" "/home/dell/Documents/purefusion/codegen/exe/runeef/robustNormalization.cpp"
g++ -I/usr/local/include/opencv -I/usr/local/include -c -fwrapv -std=c++11 -pedantic -fPIC -O3 -fno-loop-optimize -fno-aggressive-loop-optimizations -Wno-variadic-macros -Wno-variadic-macros  -DMODEL=runeef -I/home/dell/Documents/purefusion/codegen/exe/runeef -I/home/dell/Documents/purefusion -I/usr/local/Polyspace/R2020a/extern/include -I/usr/local/Polyspace/R2020a/toolbox/vision/builtins/src/ocv/include -I/usr/local/Polyspace/R2020a/toolbox/vision/builtins/src/ocvcg/opencv/include -I/home/dell/Documents/purefusion/codegen/exe  -o "sort.o" "/home/dell/Documents/purefusion/codegen/exe/runeef/sort.cpp"
g++ -I/usr/local/include/opencv -I/usr/local/include -c -fwrapv -std=c++11 -pedantic -fPIC -O3 -fno-loop-optimize -fno-aggressive-loop-optimizations -Wno-variadic-macros -Wno-variadic-macros  -DMODEL=runeef -I/home/dell/Documents/purefusion/codegen/exe/runeef -I/home/dell/Documents/purefusion -I/usr/local/Polyspace/R2020a/extern/include -I/usr/local/Polyspace/R2020a/toolbox/vision/builtins/src/ocv/include -I/usr/local/Polyspace/R2020a/toolbox/vision/builtins/src/ocvcg/opencv/include -I/home/dell/Documents/purefusion/codegen/exe  -o "sortIdx.o" "/home/dell/Documents/purefusion/codegen/exe/runeef/sortIdx.cpp"
make: *** No rule to make target '-L/usr/local/lib', needed by '/home/dell/Documents/purefusion/runeef'.  Stop.

Also, the error message when I am removing $LIBS from

$(PRODUCT) : $(OBJS) $(PREBUILT_OBJS) $(LIBS)
    @echo "### Creating standalone executable "$(PRODUCT)" ..."
    $(CPP_LD) $(CPP_LDFLAGS) -o $(PRODUCT) $(OBJS) -Wl,--start-group $(LIBS) -Wl,--end-group $(SYSTEM_LIBS) $(TOOLCHAIN_LIBS) 
    @echo "### Created: $(PRODUCT)"

Last few lines of messages

g++ -I/usr/local/include/opencv -I/usr/local/include -c -fwrapv -std=c++11 -pedantic -fPIC -O3 -fno-loop-optimize -fno-aggressive-loop-optimizations -Wno-variadic-macros -Wno-variadic-macros  -DMODEL=runeef -I/home/dell/Documents/purefusion/codegen/exe/runeef -I/home/dell/Documents/purefusion -I/usr/local/Polyspace/R2020a/extern/include -I/usr/local/Polyspace/R2020a/toolbox/vision/builtins/src/ocv/include -I/usr/local/Polyspace/R2020a/toolbox/vision/builtins/src/ocvcg/opencv/include -I/home/dell/Documents/purefusion/codegen/exe  -o "sortIdx.o" "/home/dell/Documents/purefusion/codegen/exe/runeef/sortIdx.cpp"
### Creating standalone executable /home/dell/Documents/purefusion/runeef ...
g++ -Wl,-rpath,"/usr/local/Polyspace/R2020a/bin/glnxa64",-L"/usr/local/Polyspace/R2020a/bin/glnxa64" -o /home/dell/Documents/purefusion/runeef rt_nonfinite.o rtGetNaN.o rtGetInf.o detectFASTCore.o cgCommon.o extractFreakCore.o mwfreak.o main.o runeef_rtwutil.o runeef_data.o runeef_initialize.o runeef_terminate.o runeef.o colon.o string1.o rgb2gray.o abs.o histeq.o minOrMax.o sum.o imhist.o bsxfun.o cornerPoints_cg.o FeaturePointsImpl.o repmat.o extractFeatures.o mod.o eef.o remapFun.o prod.o imfilter.o padarray.o multiscaleBlendingColor.o gaussian_pyramid.o laplacian_pyramid.o upsample.o reconstruct_laplacian_pyramid.o robustNormalization.o sort.o sortIdx.o -Wl,--start-group /usr/local/Polyspace/R2020a/bin/glnxa64/libmwjpegreader.so /usr/local/Polyspace/R2020a/bin/glnxa64/libopencv_calib3d.so.3.4 /usr/local/Polyspace/R2020a/bin/glnxa64/libopencv_core.so.3.4 /usr/local/Polyspace/R2020a/bin/glnxa64/libopencv_features2d.so.3.4 /usr/local/Polyspace/R2020a/bin/glnxa64/libopencv_flann.so.3.4 /usr/local/Polyspace/R2020a/bin/glnxa64/libopencv_imgproc.so.3.4 /usr/local/Polyspace/R2020a/bin/glnxa64/libopencv_ml.so.3.4 /usr/local/Polyspace/R2020a/bin/glnxa64/libopencv_objdetect.so.3.4 /usr/local/Polyspace/R2020a/bin/glnxa64/libopencv_video.so.3.4 /usr/local/Polyspace/R2020a/bin/glnxa64/libopencv_cudaarithm.so.3.4 /usr/local/Polyspace/R2020a/bin/glnxa64/libopencv_cudabgsegm.so.3.4 /usr/local/Polyspace/R2020a/bin/glnxa64/libopencv_cudafeatures2d.so.3.4 /usr/local/Polyspace/R2020a/bin/glnxa64/libopencv_cudafilters.so.3.4 /usr/local/Polyspace/R2020a/bin/glnxa64/libopencv_cudaimgproc.so.3.4 /usr/local/Polyspace/R2020a/bin/glnxa64/libopencv_cudalegacy.so.3.4 /usr/local/Polyspace/R2020a/bin/glnxa64/libopencv_cudaobjdetect.so.3.4 /usr/local/Polyspace/R2020a/bin/glnxa64/libopencv_cudaoptflow.so.3.4 /usr/local/Polyspace/R2020a/bin/glnxa64/libopencv_cudastereo.so.3.4 /usr/local/Polyspace/R2020a/bin/glnxa64/libopencv_cudawarping.so.3.4 /usr/local/Polyspace/R2020a/bin/glnxa64/libopencv_cudev.so.3.4 -L/usr/local/lib -lopencv_stitching -lopencv_superres -lopencv_videostab -lopencv_aruco -lopencv_bgsegm -lopencv_bioinspired -lopencv_ccalib -lopencv_dnn_objdetect -lopencv_dpm -lopencv_highgui -lopencv_videoio -lopencv_face -lopencv_freetype -lopencv_fuzzy -lopencv_hfs -lopencv_img_hash -lopencv_line_descriptor -lopencv_optflow -lopencv_reg -lopencv_rgbd -lopencv_saliency -lopencv_stereo -lopencv_structured_light -lopencv_phase_unwrapping -lopencv_surface_matching -lopencv_tracking -lopencv_datasets -lopencv_text -lopencv_dnn -lopencv_plot -lopencv_xfeatures2d -lopencv_shape -lopencv_video -lopencv_ml -lopencv_ximgproc -lopencv_xobjdetect -lopencv_objdetect -lopencv_calib3d -lopencv_imgcodecs -lopencv_features2d -lopencv_flann -lopencv_xphoto -lopencv_photo -lopencv_imgproc -lopencv_core -Wl,--end-group -L"/usr/local/Polyspace/R2020a/bin/glnxa64" -lmwrgb2gray_tbb -lmwgetnumcores -lmwtbbhist -lmwgrayxform_tbb -lmwgrayto8 -lmwippfilter -lmwipp -lmwimfilter -lmwnhood -lm -lstdc++   
/usr/bin/ld: /usr/local/lib/libopencv_imgcodecs.so: undefined reference to `cv::Mat::Mat()'
/usr/bin/ld: /usr/local/lib/libopencv_imgcodecs.so: undefined reference to `cv::detail::check_failed_auto(int, cv::detail::CheckContext const&)'
/usr/bin/ld: /usr/local/lib/libopencv_imgcodecs.so: undefined reference to `cv::Mat::Mat(int, int, int)'
/usr/bin/ld: /usr/local/lib/libopencv_imgcodecs.so: undefined reference to `cv::detail::check_failed_MatType(int, cv::detail::CheckContext const&)'
/usr/bin/ld: /usr/local/lib/libopencv_imgcodecs.so: undefined reference to `cv::detail::check_failed_MatType(int, int, cv::detail::CheckContext const&)'
/usr/bin/ld: /usr/local/lib/libopencv_imgcodecs.so: undefined reference to `cv::detail::check_failed_MatDepth(int, int, cv::detail::CheckContext const&)'
/usr/bin/ld: /usr/local/lib/libopencv_imgcodecs.so: undefined reference to `cv::detail::check_failed_auto(int, int, cv::detail::CheckContext const&)'
/usr/bin/ld: /usr/local/lib/libopencv_imgcodecs.so: undefined reference to `cv::Mat::total() const'
/usr/bin/ld: /usr/local/lib/libopencv_imgcodecs.so: undefined reference to `cv::detail::check_failed_auto(unsigned long, unsigned long, cv::detail::CheckContext const&)'
collect2: error: ld returned 1 exit status
make: *** [runeef_rtw.mk:270: /home/dell/Documents/purefusion/runeef] Error 1

Can you show the makefile? From the error text I'm guessing one or more variables being used in the compilation command expands to an empty string leading the compiler to think some other token in the command is actually the desired output target. — G.M., Dec 30 '20 at 18:22
There's no way to know given the information you've provided. You'll have to show what you did: the value of `CFLAGS`, the rules it's used, etc. — MadScientist, Dec 30 '20 at 18:23
Note that your makefile should be included as formatted text in the question, *not* referred to via a link that requires downloading. — G.M., Dec 30 '20 at 19:49

G.M. · Accepted Answer · 2020-12-30T19:58:28.830

1

Your makefile has the variable assignment (edited for brevity)...

LIBS = $(MATLAB_ROOT)/bin/glnxa64/libmwjpegreader.so ... $(shell pkg-config --libs opencv)

Where the $(shell pkg-config --libs opencv) component will expand to something like...

-L/usr/local/lib -lopencv

But you then use $(LIBS) as a dependency for several targets, e.g...

$(PRODUCT) : $(OBJS) $(PREBUILT_OBJS) $(LIBS)

which expands to (again, edited for brevity)...

$(PRODUCT) : $(OBJS) $(PREBUILT_OBJS) -L/usr/local/lib -lopencv

Hence, when make attempts to process the target $(PRODUCT) it will see that the target seemingly depends on -L/usr/local/lib and act accordingly.

It's difficult to provide a more complete answer without more context but $(LIBS) probably shouldn't be listed as a dependency for this or any other targets.

edited Dec 30 '20 at 19:58

answered Dec 30 '20 at 19:50

G.M.

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Thanks for the answer, still gives the same error. – Suzy Dec 30 '20 at 21:09
MATLAB_ROOT includes some opencv libs which were included in makefile initially, but I need more opencv libs. So before posting this question, I first tried to include missing libs seperately, and it produced error message "usr/local/lib/.so.3.4 undefined reference to "cv::Mat::()" and similar messages. Then, I tried to link the whole opencv and got "No rule to make target '-L/usr/local/lib'" error message. Also, in the makefile I've tried deleting the opencv lib dependencies from MATLAB_ROOT and just relying on usr/local/lib path, which again failed. – Suzy Dec 30 '20 at 21:12
Please edit your question to show the output from `make` that shows the command that fails and subsequent error messages verbatim. – G.M. Dec 30 '20 at 21:24
Just edited adding last few lines of messages including error message after `make` command. – Suzy Dec 31 '20 at 12:55
The new errors you're seeing are from the linker and completely unrelated to the original problem. Please see [this post](https://stackoverflow.com/questions/12573816/what-is-an-undefined-reference-unresolved-external-symbol-error-and-how-do-i-fix). – G.M. Dec 31 '20 at 13:36
Thank you very much, finally solved and understood. – Suzy Dec 31 '20 at 16:13

No rule to make target '-L/usr/local/lib'

1 Answers1