It turns out the -arch flag is specific to the Apple-specific version of gcc. The equivalent flag to compile in linux is either -m32 or -m64, depending on your architecture. I got it to compile by editing the Makefile, changing the line "ARCH_FLAGS= -arch x86_64'" to "ARCH_FLAGS=-m64", for 64 bits architecture.

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Thanks for the note. I modified the Makefile, and compiled all the C++ files to .o files. But now when generating bin/FaceTracker, I have a lot linking errors to opencv functions.

My machine runs Ubuntu, and all the opencv library files can be found at /usr/local/lib. I don't know why g++ cannot find and link to them. My opencv sample programs can compile just fine.

Have you tried compiling FaceTracker on Ubuntu ?

Thanks,

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I built it in debian unstable, and I didn't get any other errors while
building besides that. Though I did have a build of OpenCV compiled without
video capture support, so it took me a couple of tries to figure it out and
recompile OpenCV correctly.

In your case, it might be worth a shot recompiling OpenCV including any
additional features that seem related to your missing libraries. I like to
use cmake-gui to make the building process less painful, you can find it in
the ubuntu repos with a search for cmake. Hard to tell more without looking
at your Makefile and the error output from make, though.

cheers,

On Fri, Mar 15, 2013 at 8:20 PM, pc2013 [email protected] wrote:

Thanks for the note. I modified the Makefile, and compiled all the C++
files to .o files. But now when generating bin/FaceTracker, I have a lot
linking errors to opencv functions.

My machine runs Ubuntu, and all the opencv library files can be found at
/usr/local/lib. I don't know why g++ cannot find and link to them. My
opencv sample programs can compile just fine.

Have you tried compiling FaceTracker on Ubuntu ?

Thanks,

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Reply to this email directly or view it on GitHubhttps://github.com//issues/3#issuecomment-14979878
.

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After getting the same problem, some research into this issue revealed that starting from Ubuntu 11.10, libraries must be placed behind objects needing them. For example, g++ pkg-config --cflags opencv easyprog.cpp pkg-config --libs opencv -o easyprog. I also attached the modified Makefile if you would find it useful:

Paths

OPENCV_PATH=/usr/local

Programs

CC=
CXX=g++

Flags

ARCH_FLAGS=-m64
CFLAGS=-Wextra -Wall -pedantic-errors $(ARCH_FLAGS) -O3
LDFLAGS=$(ARCH_FLAGS)
DEFINES=
INCLUDES=-I$(OPENCV_PATH)/include -Iinclude/
#LIBRARIES=-L$(OPENCV_PATH)/lib -lopencv_core -lopencv_highgui -lopencv_imgproc -lopencv_objdetect
LIBRARIES=pkg-config --libs opencv

Files which require compiling

SOURCE_FILES=
src/lib/IO.cc
src/lib/PDM.cc
src/lib/Patch.cc
src/lib/CLM.cc
src/lib/FDet.cc
src/lib/PAW.cc
src/lib/FCheck.cc
src/lib/Tracker.cc

Source files which contain a int main(..) function

SOURCE_FILES_WITH_MAIN=src/exe/face_tracker.cc

End Configuration

SOURCE_OBJECTS=$(patsubst %.cc,%.o,$(SOURCE_FILES))

ALL_OBJECTS=
$(SOURCE_OBJECTS)
$(patsubst %.cc,%.o,$(SOURCE_FILES_WITH_MAIN))

DEPENDENCY_FILES=
$(patsubst %.o,%.d,$(ALL_OBJECTS))

all: bin/face_tracker

%.o: %.cc Makefile
@# Make dependecy file
$(CXX) -MM -MT $@ -MF $(patsubst %.cc,%.d,$<) $(CFLAGS) $(DEFINES) $(INCLUDES) $<
@# Compile
$(CXX) $(CFLAGS) $(DEFINES) $(INCLUDES) -c -o $@ $<

-include $(DEPENDENCY_FILES)

bin/face_tracker: $(ALL_OBJECTS)
$(CXX) $(LDFLAGS) -o $@ $(ALL_OBJECTS) $(LIBRARIES)

.PHONY: clean
clean:
@echo "Cleaning"
@for pattern in '~' '.o' '*.d' ; do
find . -name "$$pattern" | xargs rm ;
done

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Thanks, I can compile it now.

From: CptMonac [email protected]
To: kylemcdonald/FaceTracker [email protected]
Cc: pc2013 [email protected]
Sent: Tuesday, March 19, 2013 10:59 PM
Subject: Re: [FaceTracker] compiling issue (#3)

After getting the same problem, some research into this issue revealed that starting from Ubuntu 11.10, libraries must be placed behind objects needing them. For example, g++ pkg-config --cflags opencv easyprog.cpp pkg-config --libs opencv -o easyprog. I also attached the modified Makefile if you would find it useful:
Paths
OPENCV_PATH=/usr/local
Programs
CC=
CXX=g++
Flags
ARCH_FLAGS=-m64
CFLAGS=-Wextra -Wall -pedantic-errors $(ARCH_FLAGS) -O3
LDFLAGS=$(ARCH_FLAGS)
DEFINES=
INCLUDES=-I$(OPENCV_PATH)/include -Iinclude/
#LIBRARIES=-L$(OPENCV_PATH)/lib -lopencv_core -lopencv_highgui -lopencv_imgproc -lopencv_objdetect
LIBRARIES=pkg-config --libs opencv
Files which require compiling
SOURCE_FILES=
src/lib/IO.cc
src/lib/PDM.cc
src/lib/Patch.cc
src/lib/CLM.cc
src/lib/FDet.cc
src/lib/PAW.cc
src/lib/FCheck.cc
src/lib/Tracker.cc
Source files which contain a int main(..) function
SOURCE_FILES_WITH_MAIN=src/exe/face_tracker.cc
End Configuration
SOURCE_OBJECTS=$(patsubst %.cc,%.o,$(SOURCE_FILES))
ALL_OBJECTS=
$(SOURCE_OBJECTS)
$(patsubst %.cc,%.o,$(SOURCE_FILES_WITH_MAIN))
DEPENDENCY_FILES=
$(patsubst %.o,%.d,$(ALL_OBJECTS))
all: bin/face_tracker
%.o: %.cc Makefile
@# Make dependecy file
$(CXX) -MM -MT $@ -MF $(patsubst %.cc,%.d,$<) $(CFLAGS) $(DEFINES) $(INCLUDES) $<
@# Compile
$(CXX) $(CFLAGS) $(DEFINES) $(INCLUDES) -c -o $@ $<
-include $(DEPENDENCY_FILES)
bin/face_tracker: $(ALL_OBJECTS)
$(CXX) $(LDFLAGS) -o $@ $(ALL_OBJECTS) $(LIBRARIES)
.PHONY: clean
clean:
@echo "Cleaning"
@for pattern in '~' '.o' '*.d' ; do
find . -name "$$pattern" | xargs rm ;
done
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