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• Installing Opencv on mac with brew link error

  18 mars 2016, par Pieter Bosma

  I am having trouble installing openCV on mac os. ffmpeg was not installed, so I did :

  frew install ffmpeg

  Error : You must ’brew link x264 lame libvo-aacenc xvid’ before ffmpeg can be installed.

  So I did :

  brew link x264 lame libvo-aacenc xvid

  It keeps saying,
  /usr/local/lib/ is not writable.

  I already tried :

  sudo chown -R $USER /usr/local/lib

  still the same error. I am not familiar with Mac os, so any help is welcome !

  When I run :

  brew doctor

  I get the following :

  Please note that these warnings are just used to help the Homebrew maintainers
  with debugging if you file an issue. If everything you use Homebrew for is
  working fine : please don’t worry and just ignore them. Thanks !

  Warning: /usr/local/lib isn't writable.
  
  
  
  This can happen if you "sudo make install" software that isn't managed by
  
  by Homebrew. If a formula tries to write a file to this directory, the
  
  install will fail during the link step.
  
  
  
  You should probably `chown` /usr/local/lib
  
  
  
  Warning: /usr/local/lib/pkgconfig isn't writable.
  
  
  
  This can happen if you "sudo make install" software that isn't managed by
  
  by Homebrew. If a formula tries to write a file to this directory, the
  
  install will fail during the link step.
  
  
  
  You should probably `chown` /usr/local/lib/pkgconfig
  
  
  
  Warning: Broken symlinks were found. Remove them with `brew prune`:
  
    /usr/local/lib/libopencv_calib3d.2.4.dylib
  
    /usr/local/lib/libopencv_calib3d.dylib
  
    /usr/local/lib/libopencv_contrib.2.4.dylib
  
    /usr/local/lib/libopencv_contrib.dylib
  
    /usr/local/lib/libopencv_core.2.4.dylib
  
    /usr/local/lib/libopencv_core.dylib
  
    /usr/local/lib/libopencv_features2d.2.4.dylib
  
    /usr/local/lib/libopencv_features2d.dylib
  
    /usr/local/lib/libopencv_flann.2.4.dylib
  
    /usr/local/lib/libopencv_flann.dylib
  
    /usr/local/lib/libopencv_gpu.2.4.dylib
  
    /usr/local/lib/libopencv_gpu.dylib
  
    /usr/local/lib/libopencv_highgui.2.4.dylib
  
    /usr/local/lib/libopencv_highgui.dylib
  
    /usr/local/lib/libopencv_imgproc.2.4.dylib
  
    /usr/local/lib/libopencv_imgproc.dylib
  
    /usr/local/lib/libopencv_legacy.2.4.dylib
  
    /usr/local/lib/libopencv_legacy.dylib
  
    /usr/local/lib/libopencv_ml.2.4.dylib
  
    /usr/local/lib/libopencv_ml.dylib
  
    /usr/local/lib/libopencv_nonfree.2.4.dylib
  
    /usr/local/lib/libopencv_nonfree.dylib
  
    /usr/local/lib/libopencv_objdetect.2.4.dylib
  
    /usr/local/lib/libopencv_objdetect.dylib
  
    /usr/local/lib/libopencv_ocl.2.4.dylib
  
    /usr/local/lib/libopencv_ocl.dylib
  
    /usr/local/lib/libopencv_photo.2.4.dylib
  
    /usr/local/lib/libopencv_photo.dylib
  
    /usr/local/lib/libopencv_stitching.2.4.dylib
  
    /usr/local/lib/libopencv_stitching.dylib
  
    /usr/local/lib/libopencv_superres.2.4.dylib
  
    /usr/local/lib/libopencv_superres.dylib
  
    /usr/local/lib/libopencv_video.2.4.dylib
  
    /usr/local/lib/libopencv_video.dylib
  
    /usr/local/lib/libopencv_videostab.2.4.dylib
  
    /usr/local/lib/libopencv_videostab.dylib
  
  
  
  Warning: "config" scripts exist outside your system or Homebrew directories.
  
  `./configure` scripts often look for *-config scripts to determine if
  
  software packages are installed, and what additional flags to use when
  
  compiling and linking.
  
  
  
  Having additional scripts in your path can confuse software installed via
  
  Homebrew if the config script overrides a system or Homebrew provided
  
  script of the same name. We found the following "config" scripts:
  
  
  
    /opt/local/bin/curl-config
  
    /opt/local/bin/freetype-config
  
    /opt/local/bin/libpng-config
  
    /opt/local/bin/libpng16-config
  
    /opt/local/bin/ncurses5-config
  
    /opt/local/bin/ncursesw5-config
  
    /opt/local/bin/pkg-config
  
    /opt/local/bin/python2.7-config
  
    /opt/local/bin/sdl-config
  
    /opt/local/bin/xml2-config
  
    /opt/local/bin/xslt-config
  
    /Library/Frameworks/Python.framework/Versions/2.7/bin/python-config
  
    /Library/Frameworks/Python.framework/Versions/2.7/bin/python2-config
  
    /Library/Frameworks/Python.framework/Versions/2.7/bin/python2.7-config
  
  
  
  Warning: Your XQuartz (2.7.5) is outdated
  
  Please install XQuartz 2.7.7:
  
    https://xquartz.macosforge.org
  
  
  
  Warning: Python is installed at /Library/Frameworks/Python.framework
  
  
  
  Homebrew only supports building against the System-provided Python or a
  
  brewed Python. In particular, Pythons installed to /Library can interfere
  
  with other software installs.
  
  
  
  Warning: You have MacPorts or Fink installed:
  
    /opt/local/bin/port
  
  
  
  This can cause trouble. You don't have to uninstall them, but you may want to
  
  temporarily move them out of the way, e.g.
  
  
  
    sudo mv /opt/local ~/macports
  
  
  
  Warning: Unbrewed dylibs were found in /usr/local/lib.
  
  If you didn't put them there on purpose they could cause problems when
  
  building Homebrew formulae, and may need to be deleted.
  
  
  
  Unexpected dylibs:
  
      /usr/local/lib/libdc1394.22.dylib
  
      /usr/local/lib/libtcl8.6.dylib
  
      /usr/local/lib/libtk8.6.dylib
  
  
  
  Warning: Unbrewed header files were found in /usr/local/include.
  
  If you didn't put them there on purpose they could cause problems when
  
  building Homebrew formulae, and may need to be deleted.
  
  
  
  Unexpected header files:
  
      /usr/local/include/fakemysql.h
  
      /usr/local/include/fakepq.h
  
      /usr/local/include/fakesql.h
  
      /usr/local/include/itcl.h
  
      /usr/local/include/itcl2TclOO.h
  
      /usr/local/include/itclDecls.h
  
      /usr/local/include/itclInt.h
  
      /usr/local/include/itclIntDecls.h
  
      /usr/local/include/itclMigrate2TclCore.h
  
      /usr/local/include/itclTclIntStubsFcn.h
  
      /usr/local/include/mysqlStubs.h
  
      /usr/local/include/odbcStubs.h
  
      /usr/local/include/pqStubs.h
  
      /usr/local/include/tcl.h
  
      /usr/local/include/tclDecls.h
  
      /usr/local/include/tclOO.h
  
      /usr/local/include/tclOODecls.h
  
      /usr/local/include/tclPlatDecls.h
  
      /usr/local/include/tclThread.h
  
      /usr/local/include/tclTomMath.h
  
      /usr/local/include/tclTomMathDecls.h
  
      /usr/local/include/tdbc.h
  
      /usr/local/include/tdbcDecls.h
  
      /usr/local/include/tdbcInt.h
  
      /usr/local/include/tk.h
  
      /usr/local/include/tkDecls.h
  
      /usr/local/include/tkPlatDecls.h
  
  
  
  Warning: Unbrewed .pc files were found in /usr/local/lib/pkgconfig.
  
  If you didn't put them there on purpose they could cause problems when
  
  building Homebrew formulae, and may need to be deleted.
  
  
  
  Unexpected .pc files:
  
      /usr/local/lib/pkgconfig/tcl.pc
  
      /usr/local/lib/pkgconfig/tk.pc
  
  
  
  Warning: Unbrewed static libraries were found in /usr/local/lib.
  
  If you didn't put them there on purpose they could cause problems when
  
  building Homebrew formulae, and may need to be deleted.
  
  
  
  Unexpected static libraries:
  
      /usr/local/lib/libtclstub8.6.a
  
      /usr/local/lib/libtkstub8.6.a
  
  
  
  Warning: You have unlinked kegs in your Cellar
  
  Leaving kegs unlinked can lead to build-trouble and cause brews that depend on
  
  those kegs to fail to run properly once built. Run `brew link` on these:
  
  
  
      apple-gcc42
  
      eigen
  
      gcc
  
      gdbm
  
      gmp
  
      isl
  
      jpeg
  
      lame
  
      libmpc
  
      libvo-aacenc
  
      mpfr
  
      python
  
      x264
  
      xvid
  
  
  
  Warning: Some installed formula are missing dependencies.
  
  You should `brew install` the missing dependencies:
  
  
  
      brew install libxml2
  
  
  
  Run `brew missing` for more details.
  
  
  
  Warning: You have a non-Homebrew 'pkg-config' in your PATH:
  
    /opt/local/bin/pkg-config
  
  
  
  `./configure` may have problems finding brew-installed packages using
  
  this other pkg-config.

• build : fix lcov with src link

  3 février 2016, par Andreas Cadhalpun

  build : fix lcov with src link
  When out-of-tree builds now use a relative path, the ’-b’ option of lcov
  
  is not needed, so just pass the current directory to it in this case.
  Signed-off-by : Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
  

  • [DH] tests/Makefile

• Specifying correct library to link in Xcode when multiple copies exist on search path

  23 avril 2015, par Robotbugs

  I am trying to compile a C++ file that depends on ffmpeg. I have spent a long time trying to fix all the link errors. I found that on the Mac it needs :

  libbz2.dylib
  
  libiconv.dylib
  
  libz.dylib
  
  libavcodec.a
  
  libavformat.a
  
  libswscale.a
  
  libswresample.a
  
  VideoDecodeAcceleration.framework
  
  CodeVideo.framework
  
  CoreFoundation.framework

  The problem I have is that I still get symbol link errors for libiconv even though the library is present in /usr/lib and all the other libraries in this directory are being found there. The compile line includes -liconv.2

  On searching around I found that the problem comes from there being two version of libiconv on my system. One is in /usr/lib and the other is in /opt/local/lib. The one in /usr/lib exports symbols that ffmpeg uses named like "_iconv_open", whereas the one in /opt/local/lib exports the same symbols with "lib" added, e.g. "_libiconv_open". It seems the compiler is picking up the /opt/local/lib library.

  How can I get Xcode to pick up the correct lib ?