libfreetype6-dev: Depende de: libfreetype6?

Question

Estou tentando instalar o opencv no processador Ubuntu SoB do 14.04 do Zynq SoC

linaro@linaro-nano:~$ sudo apt-get update
    Ign http://ports.ubuntu.com trusty InRelease
    Ign http://ppa.launchpad.net trusty InRelease
    Hit http://ports.ubuntu.com trusty Release.gpg
    Hit http://ppa.launchpad.net trusty Release.gpg
    Hit http://ports.ubuntu.com trusty Release
    Hit http://ppa.launchpad.net trusty Release
    Hit http://ports.ubuntu.com trusty/main Sources
    Hit http://ppa.launchpad.net trusty/main Sources
    Hit http://ports.ubuntu.com trusty/universe Sources
    Hit http://ppa.launchpad.net trusty/main armhf Packages
    Hit http://ports.ubuntu.com trusty/main armhf Packages
    Hit http://ppa.launchpad.net trusty/main Translation-en
    Hit http://ports.ubuntu.com trusty/universe armhf Packages
    Hit http://ports.ubuntu.com trusty/main Translation-en
    Hit http://ports.ubuntu.com trusty/universe Translation-en
    Reading package lists... Done
    linaro@linaro-nano:~$ sudo apt-get install pkg-config build-essential libopencv-dev
    Reading package lists... Done
    Building dependency tree       
    Reading state information... Done
    build-essential is already the newest version.
    pkg-config is already the newest version.
    Some packages could not be installed. This may mean that you have
    requested an impossible situation or if you are using the unstable
    distribution that some required packages have not yet been created
    or been moved out of Incoming.
    The following information may help to resolve the situation:

    The following packages have unmet dependencies:
     libopencv-dev : Depends: libopencv-objdetect-dev (= 2.4.8+dfsg1-2ubuntu1) but it is not going to be installed
                     Depends: libopencv-highgui-dev (= 2.4.8+dfsg1-2ubuntu1) but it is not going to be installed
                     Depends: libopencv-legacy-dev (= 2.4.8+dfsg1-2ubuntu1) but it is not going to be installed
                     Depends: libopencv-contrib-dev (= 2.4.8+dfsg1-2ubuntu1) but it is not going to be installed
                     Depends: libopencv-videostab-dev (= 2.4.8+dfsg1-2ubuntu1) but it is not going to be installed
                     Depends: libopencv-superres-dev (= 2.4.8+dfsg1-2ubuntu1) but it is not going to be installed
                     Depends: libopencv-ocl-dev (= 2.4.8+dfsg1-2ubuntu1) but it is not going to be installed
                     Depends: libcv-dev (= 2.4.8+dfsg1-2ubuntu1) but it is not going to be installed
                     Depends: libhighgui-dev (= 2.4.8+dfsg1-2ubuntu1) but it is not going to be installed
                     Depends: libcvaux-dev (= 2.4.8+dfsg1-2ubuntu1) but it is not going to be installed
    E: Unable to correct problems, you have held broken packages.
    linaro@linaro-nano:~$ sudo apt-get install libopencv-objdetect-dev libopencv-highgui-dev libopencv-legacy-dev libopencv-contrib-dev libopencv-videostab-dev libopencv-superres-dev libcvaux-dev libhighgui-dev libcv-dev libopencv-ocl-dev pkg-config build-essential libopencv-dev
    Reading package lists... Done
    Building dependency tree       
    Reading state information... Done
    build-essential is already the newest version.
    pkg-config is already the newest version.
    Some packages could not be installed. This may mean that you have
    requested an impossible situation or if you are using the unstable
    distribution that some required packages have not yet been created
    or been moved out of Incoming.
    The following information may help to resolve the situation:

    The following packages have unmet dependencies:
     libopencv-highgui-dev : Depends: libgtk2.0-dev but it is not going to be installed
    E: Unable to correct problems, you have held broken packages.
    linaro@linaro-nano:~$ sudo apt-get install libgtk2.0-dev libopencv-objdetect-dev libopencv-highgui-dev libopencv-legacy-dev libopencv-contrib-dev libopencv-videostab-dev libopencv-superres-dev libcvaux-dev libhighgui-dev libcv-dev libopencv-ocl-dev pkg-config build-essential libopencv-dev
    Reading package lists... Done
    Building dependency tree       
    Reading state information... Done
    build-essential is already the newest version.
    pkg-config is already the newest version.
    Some packages could not be installed. This may mean that you have
    requested an impossible situation or if you are using the unstable
    distribution that some required packages have not yet been created
    or been moved out of Incoming.
    The following information may help to resolve the situation:

    The following packages have unmet dependencies:
     libgtk2.0-dev : Depends: libpango1.0-dev (>= 1.20) but it is not going to be installed
                     Depends: libcairo2-dev (>= 1.6.4-6.1) but it is not going to be installed
    E: Unable to correct problems, you have held broken packages.
    linaro@linaro-nano:~$ sudo apt-get install  libcairo2-dev libpango1.0-dev libgtk2.0-dev libopencv-objdetect-dev libopencv-highgui-dev libopencv-legacy-dev libopencv-contrib-dev libopencv-videostab-dev libopencv-superres-dev libcvaux-dev libhighgui-dev libcv-dev libopencv-ocl-dev pkg-config build-essential libopencv-dev
    Reading package lists... Done
    Building dependency tree       
    Reading state information... Done
    build-essential is already the newest version.
    pkg-config is already the newest version.
    Some packages could not be installed. This may mean that you have
    requested an impossible situation or if you are using the unstable
    distribution that some required packages have not yet been created
    or been moved out of Incoming.
    The following information may help to resolve the situation:

    The following packages have unmet dependencies:
     libcairo2-dev : Depends: libfontconfig1-dev (>= 2.2.95) but it is not going to be installed
                     Depends: libfreetype6-dev (>= 2.1.10) but it is not going to be installed
     libpango1.0-dev : Depends: libfreetype6-dev but it is not going to be installed
                       Depends: libxft-dev but it is not going to be installed
                       Depends: libfontconfig1-dev (>= 2.10.91) but it is not going to be installed
    E: Unable to correct problems, you have held broken packages.
    linaro@linaro-nano:~$ sudo apt-get install libfontconfig1-dev libxft-dev libfreetype6-dev libfontconfig1-dev libcairo2-dev libpango1.0-dev libgtk2.0-dev libopencv-objdetect-dev libopencv-highgui-dev libopencv-legacy-dev libopencv-contrib-dev libopencv-videostab-dev libopencv-superres-dev libcvaux-dev libhighgui-dev libcv-dev libopencv-ocl-dev pkg-config build-essential libopencv-dev
    Reading package lists... Done
    Building dependency tree       
    Reading state information... Done
    build-essential is already the newest version.
    pkg-config is already the newest version.
    Some packages could not be installed. This may mean that you have
    requested an impossible situation or if you are using the unstable
    distribution that some required packages have not yet been created
    or been moved out of Incoming.
    The following information may help to resolve the situation:

    The following packages have unmet dependencies:
     libfreetype6-dev : Depends: libfreetype6 (= 2.5.2-1ubuntu2) but 2.5.2-1ubuntu2.2 is to be installed
    E: Unable to correct problems, you have held broken packages.

    

Answer 1

O pacote libfreetype6-dev que você deseja instalar requer o pacote libfreetype6 na versão específica 2.5.2-1ubuntu2 , mas você parece ter um pouco mais novo instalado. Infelizmente, o libfreetype6-dev que você deseja instalar está configurado para aceitar apenas uma versão específica de libfreetype6 em vez de uma versão mais recente (por um motivo ou não? Não sei).

Para resolver a dependência, você pode fazer downgrade de libfreetype6 forçando o apt-get a instalar a versão solicitada:

sudo apt-get install libfreetype6=2.5.2-1ubuntu2