How to solve "Apple Mach-O Linker (id) Error".

x-code
#1

Hello, everyone.

I’m beginner of OF.
I’m trying to use ofxOpenCv and make “color tracker”.
Just like this video.
http://www.youtube.com/watch?v=yuSbbVwHdI0&feature=related

The first step to make color tracker, I tried to do the following site’s sample.
http://d.hatena.ne.jp/afeq/20101025/1287932718
So, I copied and pasted the sorce code and add ofxOpenCv addons.
But, I couldn’t compile, and it was displayed the following error.

issues:
Apple Mach-O Linker (id) Error
“testApp::mouseMoved(int, int)”, referenced from:

Apple Mach-O Linker (id) Error
“testApp::mouseDragged(int, int, int)”, referenced from:

Apple Mach-O Linker (id) Error
“testApp::mouseReleased(int, int, int)”, referenced from:

Apple Mach-O Linker (id) Error
“testApp::keyPressed(int)”, referenced from:

Apple Mach-O Linker (id) Error
“testApp::keyReleased(int)”, referenced from:

Apple Mach-O Linker (id) Error
“testApp::windowResized(int, int)”, referenced from:

concrete content of issues
Ld bin/opencvStudy_01Debug.app/Contents/MacOS/opencvStudy_01Debug normal i386
cd “/Users/MYPCNAME/Documents/of_0071_osx_release/apps/myApps/opencvStudy_01”
/Developer/usr/bin/llvm-g+±4.2 -arch i386 “-L/Users/MYPCNAME 1/Documents/of_0071_osx_release/apps/myApps/opencvStudy_01/bin” “-L/Users/MYPCNAME 1/Documents/of_0071_osx_release/apps/myApps/opencvStudy_01/…/…/…/…/of_preRelease_v007_osx/addons/ofxOpenCv/libs/opencv/lib/osx” “-L/Users/MYPCNAME 1/Documents/of_0071_osx_release/apps/myApps/opencvStudy_01/…/…/…/addons/ofxOpenCv/libs/opencv/lib/osx” “-F/Users/MYPCNAME/Documents/of_0071_osx_release/apps/myApps/opencvStudy_01/bin” “-F/Users/MYPCNAME /Documents/of_0071_osx_release/apps/myApps/opencvStudy_01/…/…/…/libs/glut/lib/osx” -filelist “/Users/MYPCNAME 1/Documents/of_0071_osx_release/apps/myApps/opencvStudy_01/build/opencvStudy_01.build/Debug/opencvStudy_01.build/Objects-normal/i386/opencvStudy_01Debug.LinkFileList” -dead_strip …/…/…/libs/poco/lib/osx/PocoCrypto.a …/…/…/libs/poco/lib/osx/PocoData.a …/…/…/libs/poco/lib/osx/PocoDataODBC.a …/…/…/libs/poco/lib/osx/PocoDataSQLite.a …/…/…/libs/poco/lib/osx/PocoFoundation.a …/…/…/libs/poco/lib/osx/PocoNet.a …/…/…/libs/poco/lib/osx/PocoNetSSL.a …/…/…/libs/poco/lib/osx/PocoUtil.a …/…/…/libs/poco/lib/osx/PocoXML.a …/…/…/libs/poco/lib/osx/PocoZip.a …/…/…/libs/tess2/lib/osx/tess2.a …/…/…/libs/glew/lib/osx/glew.a …/…/…/libs/cairo/lib/osx/cairo-script-interpreter.a …/…/…/libs/cairo/lib/osx/cairo.a …/…/…/libs/cairo/lib/osx/pixman-1.a …/…/…/libs/fmodex/lib/osx/libfmodex.dylib …/…/…/libs/rtAudio/lib/osx/rtAudio.a -framework GLUT “/Users/MYPCNAME 1/Documents/of_0071_osx_release/libs/openFrameworksCompiled/lib/osx/openFrameworksDebug.a” -framework AGL -framework ApplicationServices -framework AudioToolbox -framework Carbon -framework CoreAudio -framework CoreFoundation -framework CoreServices -framework OpenGL -framework QuickTime -framework AppKit -framework Cocoa -framework IOKit “/Users/MYPCNAME 1/Documents/of_0071_osx_release/apps/myApps/opencvStudy_01/…/…/…/addons/ofxOpenCv/libs/opencv/lib/osx/opencv.a” -o “/Users/MYPCNAME 1/Documents/of_0071_osx_release/apps/myApps/opencvStudy_01/bin/opencvStudy_01Debug.app/Contents/MacOS/opencvStudy_01Debug”

Undefined symbols for architecture i386:
“testApp::mouseMoved(int, int)”, referenced from:
vtable for testAppin testApp.o
“testApp::mouseDragged(int, int, int)”, referenced from:
vtable for testAppin testApp.o
“testApp::mouseReleased(int, int, int)”, referenced from:
vtable for testAppin testApp.o
“testApp::keyPressed(int)”, referenced from:
vtable for testAppin testApp.o
“testApp::keyReleased(int)”, referenced from:
vtable for testAppin testApp.o
“testApp::windowResized(int, int)”, referenced from:
vtable for testAppin testApp.o
ld: symbol(s) not found for architecture i386
collect2: ld returned 1 exit status

note:
-My xcode version is “4.0.2”
-My OS is “OSX snow leopard”
-My OF version is “of_0071_osx_release”

If you know how to solve those error, please teach me.

Thanks very much for your help.

#2

My best guess would be that you check in your testApp.h if the following functions are listed:

  • mouseMoved

  • mouseDragged

  • mouseReleased

  • keyPressed

  • keyReleased

  • windowResized

And do the same in testApp.cpp. I believe they are only in one of those both files.

in testApp.h you would put their declaration, such as:

void mouseMoved(int x, int y, int button);

in testApp.cpp you would put their code:

void testApp::mouseMoved(int x, int y, int button){
// Do stuff when mouse is moved.
}

#3

Hi, Meach.

Thank you for your cooperation!
Thanks to your advice, I could run my program.
This was an elementary mistake.

I always feel that your help give me a charge.
I really appreciate cooperation of the member of this community.

sincerely yours,
hoshi427