CODEWITHSUNDEEP
c++macosopencvmakefile
csuo
csuo

Reputation: 820

Makefile does not work on mac os x Mavericks

I have a project, which uses opencv library. Today I have upgraded my Mac OS X Lion to Mavericks and now I am wondering why it does not compile anymore because of the following error:

c++ -O2 -g -Wall -fmessage-length=0    -c -o Hello.o Hello.cpp
Hello.cpp:2:10: fatal error: 'opencv/cv.h' file not found
#include "opencv/cv.h"
         ^
1 error generated.
make: *** [Hello.o] Error 1

Here's the code of Hello.cpp:

#include <iostream>
#include "opencv/cv.h"

using namespace std;

int main(){
    return 0;
}

Here's my makefile:

CXXFLAGS =  -O2 -g -Wall -fmessage-length=0 

OBJS =      Hello.o

LIBS =  -lopencv_core -lopencv_imgproc -lopencv_calib3d -lopencv_video -lopencv_features2d -lopencv_ml -lopencv_highgui -lopencv_objdetect -lopencv_contrib -lopencv_legacy -lopencv_gpu


INCPATH = -I/usr/local/Cellar/opencv/2.4.6.1/include
LIBPATH = -L/usr/local/Cellar/opencv/2.4.6.1/lib

TARGET =    Hello

$(TARGET):  $(OBJS)
    g++ $(INCPATH) $(LIBPATH) -o $(TARGET) $(OBJS) $(LIBS) 


all:    $(TARGET)


clean:
    rm -f $(OBJS) $(TARGET)

I have to say that I can compile my project using terminal by typing:

g++ `pkg-config --cflags opencv` Hello.cpp -o Hello

and to be sure, this is what I get by running pkg-config --cflags opencv on terminal:

-I/usr/local/Cellar/opencv/2.4.6.1/include/opencv

Upvotes: 0

Views: 6221

Answers (3)

peter
peter

Reputation: 21

Dear i got the same error, please have a look here:

C++ linking error after upgrading to Mac OS X 10.9 / Xcode 5.0.1

very quick solution: add -stdlib=libstdc++ to the linking command.

Upvotes: 0

Paul R
Paul R

Reputation: 212969

You makefile does not have an explicit rule for building Hello.o so it is using a default rule. There are various ways to handle this but I would just change it to:

CXXFLAGS =  -O2 -g -Wall -fmessage-length=0 

SRCS =      Hello.cpp

LIBS =  -lopencv_core -lopencv_imgproc -lopencv_calib3d -lopencv_video -lopencv_features2d -lopencv_ml -lopencv_highgui -lopencv_objdetect -lopencv_contrib -lopencv_legacy -lopencv_gpu

INCPATH = -I/usr/local/Cellar/opencv/2.4.6.1/include
LIBPATH = -L/usr/local/Cellar/opencv/2.4.6.1/lib

TARGET =    Hello

$(TARGET):  $(SRCS)
    g++ $(CXXFLAGS) $(INCPATH) $(LIBPATH) -o $(TARGET) $(SRCS) $(LIBS) 

all:    $(TARGET)

clean:
    rm -f $(TARGET)

Upvotes: 1

MadScientist
MadScientist

Reputation: 100836

I doubt this makefile ever worked, unless somehow the new version of MacOSX has moved those headers out of the standard location into a different location.

You are using the default built-in rules, as Paul R says, but you are not using the default make variables that go with those rules. I would write my makefile like this:

CXX = g++
CXXFLAGS = -O2 -g -Wall -fmessage-length=0 
CPPFLAGS = -I/usr/local/Cellar/opencv/2.4.6.1/include

OBJS =      Hello.o

LDFLAGS = -L/usr/local/Cellar/opencv/2.4.6.1/lib
LDLIBS =  -lopencv_core -lopencv_imgproc -lopencv_calib3d -lopencv_video \
          -lopencv_features2d -lopencv_ml -lopencv_highgui -lopencv_objdetect \
          -lopencv_contrib -lopencv_legacy -lopencv_gpu

TARGET =    Hello

.PHONY: all
all: $(TARGET)
$(TARGET):  $(OBJS)
         $(CXX) $(LDFLAGS) $^ $(LDLIBS) -o $@

.PHONY: clean
clean:
        rm -f $(OBJS) $(TARGET)

Upvotes: 3

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