如何在ubuntu14.04

我想學習LLVM所以我在我的Ubuntu 14.04安裝鐺鐺安裝，但我遇到一些problems.Here是：如何在ubuntu14.04

當我執行命令：sudo apt-get install clang-3.5我只是得到喜歡跟隨一些錯誤消息：

Reading package lists... Done Building dependency tree  Reading 
state information... Done 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: clang-3.5 : Depends: 
libclang1-3.5 (= 1:3.5~svn201651-1ubuntu1) but it is not going to be 
installed 
Depends: libobjc-4.8-dev but it is not going to be installed E: Unable to correct problems, you have held broken 
packages.

，然後我嘗試安裝libclang1-3.5，所以我執行命令：

sudo apt-get install libclang1-3.5

，然後我得到了另一條錯誤消息像以前一樣：

Reading package lists... Done Building dependency tree  Reading 
state information... Done 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: libclang1-3.5 : 
Depends: libobjc-4.8-dev but it is not going to be installed E: Unable 
to correct problems, you have held broken packages.

然後我執行命令：

sudo apt-get install libobjc-4.8-dev

這個時候得到錯誤信息：

The following packages have unmet dependencies: libobjc-4.8-dev : 
Depends: gcc-4.8-base (= 4.8.2-19ubuntu1) but 4.8.4-2ubuntu1~14.04.1 
is to be installed 
Depends: libgcc-4.8-dev (= 4.8.2-19ubuntu1) but 4.8.4-2ubuntu1~14.04.1 is to be installed 
Depends: libobjc4 (>= 4.8.2-19ubuntu1) but it is not going to be installed E: Unable to correct problems, you have held 
broken packages.

後

sudo apt-get install gcc-4.8-dev 再次得到一些錯誤信息

Reading package lists... Done 
Building dependency tree  
Reading state information... Done 

The following packages have unmet dependencies: 
lib32gcc-4.8-dev : Depends: gcc-4.8-base (= 4.8.2-19ubuntu1) but 4.8.4-2ubuntu1~14.04.1 is to be installed 
        Depends: lib32gomp1 (>= 4.8.2-19ubuntu1) but it is not going to be installed 
        Depends: libx32gomp1 (>= 4.8.2-19ubuntu1) but it is not going to be installed 
        Depends: lib32itm1 (>= 4.8.2-19ubuntu1) but it is not going to be installed 
        Depends: libx32itm1 (>= 4.8.2-19ubuntu1) but it is not going to be installed 
        Depends: lib32atomic1 (>= 4.8.2-19ubuntu1) but it is not going to be installed 
        Depends: libx32atomic1 (>= 4.8.2-19ubuntu1) but it is not going to be installed 
        Depends: lib32asan0 (>= 4.8.2-19ubuntu1) but it is not going to be installed 
        Depends: libx32asan0 (>= 4.8.2-19ubuntu1) but it is not going to be installed 
        Depends: lib32quadmath0 (>= 4.8.2-19ubuntu1) but it is not going to be installed 
        Depends: libx32quadmath0 (>= 4.8.2-19ubuntu1) but it is not going to be installed 
libx32gcc-4.8-dev : Depends: gcc-4.8-base (= 4.8.2-19ubuntu1) but 4.8.4-2ubuntu1~14.04.1 is to be installed 
        Depends: lib32gomp1 (>= 4.8.2-19ubuntu1) but it is not going to be installed 
        Depends: libx32gomp1 (>= 4.8.2-19ubuntu1) but it is not going to be installed 
        Depends: lib32itm1 (>= 4.8.2-19ubuntu1) but it is not going to be installed 
        Depends: libx32itm1 (>= 4.8.2-19ubuntu1) but it is not going to be installed 
        Depends: lib32atomic1 (>= 4.8.2-19ubuntu1) but it is not going to be installed 
        Depends: libx32atomic1 (>= 4.8.2-19ubuntu1) but it is not going to be installed 
        Depends: lib32asan0 (>= 4.8.2-19ubuntu1) but it is not going to be installed 
        Depends: libx32asan0 (>= 4.8.2-19ubuntu1) but it is not going to be installed 
        Depends: lib32quadmath0 (>= 4.8.2-19ubuntu1) but it is not going to be installed 
        Depends: libx32quadmath0 (>= 4.8.2-19ubuntu1) but it is not going to be installed 
E: Unable to correct problems, you have held broken packages.

什麼我現在應該做什麼？

============================================== 執行命令後sudo apt-get purge gcc *我得到了跟蹤消息，似乎遇到了一些錯誤。

[email protected]:/$ sudo apt-get purge gcc* 
Reading package lists... Done 
Building dependency tree  
Reading state information... Done 
Note, selecting 'gcc-4.8-aarch64-linux-gnu' for regex 'gcc*' 
Note, selecting 'libx32gcc-4.7-dev' for regex 'gcc*' 
Note, selecting 'libghc-gconf-dev' for regex 'gcc*' 
Note, selecting 'gcompris-sound-pa' for regex 'gcc*' 
Note, selecting 'libghc-libtagc-prof' for regex 'gcc*' 
Note, selecting 'libgcc1-dbg-armel-cross' for regex 'gcc*' 
Note, selecting 'gcj-4.8-jdk-aarch64-linux-gnu' for regex 'gcc*' 
Note, selecting 'libhfgcc1-armel-dcv1' for regex 'gcc*' 
Note, selecting 'gcj-4.8-aarch64-linux-gnu' for regex 'gcc*' 
Note, selecting 'gcompris-sound-pt' for regex 'gcc*' 
Note, selecting 'gccgo-4.7' for regex 'gcc*' 
Note, selecting 'gccgo-4.8' for regex 'gcc*' 
Note, selecting 'gccgo-4.9' for regex 'gcc*' 
Note, selecting 'gcj-aarch64-linux-gnu' for regex 'gcc*' 
Note, selecting 'logcentral' for regex 'gcc*' 
Note, selecting 'libgcc1-dbg-powerpc-cross' for regex 'gcc*' 
Note, selecting 'gconf2' for regex 'gcc*' 
Note, selecting 'gcc-4.4-locales' for regex 'gcc*' 
Note, selecting 'gcompris-sound-ru' for regex 'gcc*' 
Note, selecting 'gcc-4.4-powerpc-linux-gnu' for regex 'gcc*' 
Note, selecting 'lib32gcc-4.7-dev' for regex 'gcc*' 
Note, selecting 'guile-gnome2-gconf' for regex 'gcc*' 
Note, selecting 'gcovr' for regex 'gcc*' 
Note, selecting 'gcal-common' for regex 'gcc*' 
Note, selecting 'pulseaudio-module-gconf' for regex 'gcc*' 
Note, selecting 'gcc-4.8-base' for regex 'gcc*' 
Note, selecting 'java-gcj-compat' for regex 'gcc*' 
Note, selecting 'gcompris-sound-sk' for regex 'gcc*' 
Note, selecting 'gcompris-sound-sl' for regex 'gcc*' 
Note, selecting 'libgcr-3-doc' for regex 'gcc*' 
Note, selecting 'gcj-jre-headless' for regex 'gcc*' 
Note, selecting 'gcompris-sound-so' for regex 'gcc*' 
Note, selecting 'gcc-4.8-plugin-dev' for regex 'gcc*' 
Note, selecting 'gcompris-sound-sr' for regex 'gcc*' 
Note, selecting 'gcompris-sound-sv' for regex 'gcc*' 
Note, selecting 'libghc-svgcairo-dev-0.12.1-becda' for regex 'gcc*' 
Note, selecting 'libgcrypt-doc' for regex 'gcc*' 
Note, selecting 'libtagc0-ruby' for regex 'gcc*' 
Note, selecting 'gccgo-4.9-doc' for regex 'gcc*' 
Note, selecting 'gcompris-sound-th' for regex 'gcc*' 
Note, selecting 'libgcc1-armel-cross' for regex 'gcc*' 
Note, selecting 'gcompris-sound-tr' for regex 'gcc*' 
Note, selecting 'gcc-4.8-aarch64-linux-gnu-base' for regex 'gcc*' 
Note, selecting 'gcc-aarch64-linux-gnu' for regex 'gcc*' 
Note, selecting 'kjumpingcube' for regex 'gcc*' 
Note, selecting 'eclipse-rcp-gcj' for regex 'gcc*' 
Note, selecting 'tagcoll' for regex 'gcc*' 
Note, selecting 'gcc-4.8-source' for regex 'gcc*' 
Note, selecting 'java-gcj-compat-headless' for regex 'gcc*' 
Note, selecting 'gcompris' for regex 'gcc*' 
Note, selecting 'libgconfmm-2.6-doc' for regex 'gcc*' 
Note, selecting 'gcompris-sound-ur' for regex 'gcc*' 
Note, selecting 'gcc-4.7-arm-linux-gnueabihf' for regex 'gcc*' 
Note, selecting 'icedtea-gcjwebplugin' for regex 'gcc*' 
Note, selecting 'gcc-4.4-arm-linux-gnueabihf' for regex 'gcc*' 
Note, selecting 'gcc-mingw-w64-bootstrap' for regex 'gcc*' 
Note, selecting 'gcc-4.8-multilib' for regex 'gcc*' 
Note, selecting 'libtagc0-dev' for regex 'gcc*' 
Note, selecting 'gconf-service-backend' for regex 'gcc*' 
Note, selecting 'logcheck-database' for regex 'gcc*' 
Note, selecting 'libgcc1-dbg-arm64-cross' for regex 'gcc*' 
Note, selecting 'gcc-4.8-powerpc64le-linux-gnu-base' for regex 'gcc*' 
Note, selecting 'lib32gcc1' for regex 'gcc*' 
Note, selecting 'libhtml-tagcloud-perl' for regex 'gcc*' 
Note, selecting 'gccgo' for regex 'gcc*' 
Note, selecting 'gconf2-common' for regex 'gcc*' 
Note, selecting 'python-pygccxml' for regex 'gcc*' 
Note, selecting 'gcc-snapshot' for regex 'gcc*' 
Note, selecting 'gcc-4.8-powerpc-linux-gnu-base' for regex 'gcc*' 
Note, selecting 'gcc-4.6-multilib' for regex 'gcc*' 
Note, selecting 'libsigc++-2.0-dev' for regex 'gcc*' 
Note, selecting 'gcc-4.7-base' for regex 'gcc*' 
Note, selecting 'libgc-dev' for regex 'gcc*' 
Note, selecting 'libgconf2.0-cil-dev' for regex 'gcc*' 
Note, selecting 'pulseaudio-module-gconf-dbg' for regex 'gcc*' 
Note, selecting 'libgcc1-armhf-dcv1' for regex 'gcc*' 
Note, selecting 'libx32gcc-4.8-dev' for regex 'gcc*' 
Note, selecting 'libvomsjapi-java-gcj' for regex 'gcc*' 
Note, selecting 'gcc-avr' for regex 'gcc*' 
Note, selecting 'gcompris-data' for regex 'gcc*' 
Note, selecting 'libghc-gconf-dev-0.12.1.1-4d3b6' for regex 'gcc*' 
Note, selecting 'gcc-4.4-multilib' for regex 'gcc*' 
Note, selecting 'libghc-svgcairo-prof' for regex 'gcc*' 
Note, selecting 'gcc-4.6-doc' for regex 'gcc*' 
Note, selecting 'libghc-gconf-doc' for regex 'gcc*' 
Note, selecting 'gccgo-powerpc-linux-gnu' for regex 'gcc*' 
Note, selecting 'libsac-java-gcj' for regex 'gcc*' 
Note, selecting 'fcitx-libs-gclient' for regex 'gcc*' 
Note, selecting 'gcj-4.8-jdk-powerpc64le-linux-gnu' for regex 'gcc*' 
Note, selecting 'libgnome2-gconf-perl' for regex 'gcc*' 
Note, selecting 'gcal' for regex 'gcc*' 
Note, selecting 'gcap' for regex 'gcc*' 
Note, selecting 'libgcc1-arm64-cross' for regex 'gcc*' 
Note, selecting 'libsigc++-1.1-dev' for regex 'gcc*' 
Note, selecting 'gcj-jdk' for regex 'gcc*' 
Note, selecting 'gcj-arm-linux-gnueabihf' for regex 'gcc*' 
Note, selecting 'lib32gcc-4.8-dev' for regex 'gcc*' 
Note, selecting 'colorgcc' for regex 'gcc*' 
Note, selecting 'sagcad-doc' for regex 'gcc*' 
Note, selecting 'libghc-svgcairo-dev' for regex 'gcc*' 
Note, selecting 'lib64gcc1-powerpc-cross' for regex 'gcc*' 
Note, selecting 'compizconfig-backend-gconf' for regex 'gcc*' 
Note, selecting 'libgc1c2' for regex 'gcc*' 
Note, selecting 'libgc1c3' for regex 'gcc*' 
Note, selecting 'libgcc-4.8-dev-ppc64el-cross' for regex 'gcc*' 
Note, selecting 'gcin-qt4-immodule' for regex 'gcc*' 
Note, selecting 'gcompris-sound-ptbr' for regex 'gcc*' 
Note, selecting 'gcc-4.6-base' for regex 'gcc*' 
Note, selecting 'gcfilms' for regex 'gcc*' 
Note, selecting 'libsigc++-2.0-0' for regex 'gcc*' 
Note, selecting 'gccgo-4.8-arm-linux-gnueabihf' for regex 'gcc*' 
Note, selecting 'git-remote-gcrypt' for regex 'gcc*' 
Note, selecting 'gcc-arm-linux-gnueabi' for regex 'gcc*' 
Note, selecting 'gcdw' for regex 'gcc*' 
Note, selecting 'gcc-arm-none-eabi' for regex 'gcc*' 
Note, selecting 'libgcc1-powerpc-cross' for regex 'gcc*' 
Note, selecting 'libxmlsec1-gcrypt' for regex 'gcc*' 
Note, selecting 'libqtgconf-dev' for regex 'gcc*' 
Note, selecting 'libgcc1-armel-dcv1' for regex 'gcc*' 
Note, selecting 'libhfgcc1-dbg-armel-cross' for regex 'gcc*' 
Note, selecting 'gcc-4.5-arm-linux-gnueabi' for regex 'gcc*' 
Note, selecting 'gcj-4.8-jdk' for regex 'gcc*' 
Note, selecting 'libgcu-dbg' for regex 'gcc*' 
Note, selecting 'libsfgcc1-armhf-dcv1' for regex 'gcc*' 
Note, selecting 'gcc-opt' for regex 'gcc*' 
Note, selecting 'xgc' for regex 'gcc*' 
Note, selecting 'libsaxon-java-gcj' for regex 'gcc*' 
Note, selecting 'gcc-4.6-source' for regex 'gcc*' 
Note, selecting 'libgcc1-dbg' for regex 'gcc*' 
Note, selecting 'python-argcomplete' for regex 'gcc*' 
Note, selecting 'libsigc++-1.9-0' for regex 'gcc*' 
Note, selecting 'gcc-4.7-arm-linux-gnueabihf-base' for regex 'gcc*' 
Note, selecting 'libextutils-pkgconfig-perl' for regex 'gcc*' 
Note, selecting 'gccgo-arm-linux-gnueabihf' for regex 'gcc*' 
Note, selecting 'gcc-4.7-arm-linux-gnueabi' for regex 'gcc*' 
Note, selecting 'libghc-libtagc-prof-0.12.0-7e84b' for regex 'gcc*' 
Note, selecting 'gcstar' for regex 'gcc*' 
Note, selecting 'fcitx-table-bingchan' for regex 'gcc*' 
Note, selecting 'gccgo-multilib' for regex 'gcc*' 
Note, selecting 'libgconf2-dev' for regex 'gcc*' 
Note, selecting 'pngcrush' for regex 'gcc*' 
Note, selecting 'lib64gcc1-dbg-powerpc-cross' for regex 'gcc*' 
Note, selecting 'gccgo-4.8-powerpc-linux-gnu' for regex 'gcc*' 
Note, selecting 'libsigc++-2.0-doc' for regex 'gcc*' 
Note, selecting 'libgcc1' for regex 'gcc*' 
Note, selecting 'libgcc-4.7-dev-armhf-cross' for regex 'gcc*' 
Note, selecting 'gcc-mingw-w64-base' for regex 'gcc*' 
Note, selecting 'gcc-4.7-doc' for regex 'gcc*' 
Note, selecting 'gcc-docs' for regex 'gcc*' 
Note, selecting 'libsigc++-2.0-0c2a' for regex 'gcc*' 
Note, selecting 'gcin' for regex 'gcc*' 
Note, selecting 'libtagc0-ruby1.8' for regex 'gcc*' 
Note, selecting 'llvm-gcc' for regex 'gcc*' 
Note, selecting 'libgctp-dev' for regex 'gcc*' 
Note, selecting 'pngcheck' for regex 'gcc*' 
Note, selecting 'nagcon' for regex 'gcc*' 
Note, selecting 'libgctp0d' for regex 'gcc*' 
Note, selecting 'gcc-multilib' for regex 'gcc*' 
Note, selecting 'r-cran-mgcv' for regex 'gcc*' 
Note, selecting 'lib64gcc1-powerpc-dcv1' for regex 'gcc*' 
Note, selecting 'gccgo-4.8-multilib' for regex 'gcc*' 
Note, selecting 'libsigc++-2.0-0c2' for regex 'gcc*' 
Note, selecting 'libdesktop-agnostic-cfg-gconf' for regex 'gcc*' 
Note, selecting 'gcin-tables' for regex 'gcc*' 
Note, selecting 'libgcj14-dev' for regex 'gcc*' 
Note, selecting 'gcompris-sound-fi' for regex 'gcc*' 
Note, selecting 'libswt3.2-gtk-gcj' for regex 'gcc*' 
Note, selecting 'gccgo-doc' for regex 'gcc*' 
Note, selecting 'gcompris-sound-fr' for regex 'gcc*' 
Note, selecting 'gcc-4.8-multilib-arm-linux-gnueabihf' for regex 'gcc*' 
Note, selecting 'libghc-gconf-prof-0.12.1.1-4d3b6' for regex 'gcc*' 
Note, selecting 'eclipse-jdt-gcj' for regex 'gcc*' 
Note, selecting 'gcj-powerpc-linux-gnu' for regex 'gcc*' 
Note, selecting 'gcalcli' for regex 'gcc*' 
Note, selecting 'gcompris-sound-gd' for regex 'gcc*' 
Note, selecting 'ggcov' for regex 'gcc*' 
Note, selecting 'gcj-4.4' for regex 'gcc*' 
Note, selecting 'gcj-4.8' for regex 'gcc*' 
Note, selecting 'libgcc1-ppc64el-cross' for regex 'gcc*' 
Note, selecting 'libxerces2-java-gcj' for regex 'gcc*' 
Note, selecting 'ant-optional-gcj' for regex 'gcc*' 
Note, selecting 'gcj-4.4-base' for regex 'gcc*' 
Note, selecting 'libgcr-dev' for regex 'gcc*' 
Note, selecting 'gcompris-sound-he' for regex 'gcc*' 
Note, selecting 'gcompris-sound-hi' for regex 'gcc*' 
Note, selecting 'gcc-4.4-doc' for regex 'gcc*' 
Note, selecting 'gir1.2-gck-1' for regex 'gcc*' 
Note, selecting 'gcc-4.8-locales' for regex 'gcc*' 
Note, selecting 'gcompris-sound-hu' for regex 'gcc*' 
Note, selecting 'libsigc++-1.2-5c102' for regex 'gcc*' 
Note, selecting 'gcc-mingw-w64-i686' for regex 'gcc*' 
Note, selecting 'gcu-plugin' for regex 'gcc*' 
Note, selecting 'gccgo-4.9-multilib' for regex 'gcc*' 
Note, selecting 'gcc-4.7-multilib-arm-linux-gnueabi' for regex 'gcc*' 
Note, selecting 'gcompris-sound-id' for regex 'gcc*' 
Note, selecting 'gcj-4.8-jre-lib' for regex 'gcc*' 
Note, selecting 'logcheck' for regex 'gcc*' 
Note, selecting 'libgconf-bridge-dev' for regex 'gcc*' 
Note, selecting 'gccgo-4.7-arm-linux-gnueabi' for regex 'gcc*' 
Note, selecting 'gcompris-sound-it' for regex 'gcc*' 
Note, selecting 'libgcr-3-dev' for regex 'gcc*' 
Note, selecting 'gcin-chewing' for regex 'gcc*' 
Note, selecting 'libgcrypt-dev' for regex 'gcc*' 
Note, selecting 'gcc-powerpc-linux-gnu' for regex 'gcc*' 
Note, selecting 'gcj-4.8-jre-headless' for regex 'gcc*' 
Note, selecting 'gcin-data' for regex 'gcc*' 
Note, selecting 'gcc-4.8-arm-linux-gnueabihf' for regex 'gcc*' 
Note, selecting 'eclipse-platform-gcj' for regex 'gcc*' 
Note, selecting 'gccgo-4.7-multilib' for regex 'gcc*' 
Note, selecting 'gcolor2' for regex 'gcc*' 
Note, selecting 'gcc-4.5-arm-linux-gnueabihf' for regex 'gcc*' 
Note, selecting 'gccgo-4.8-aarch64-linux-gnu' for regex 'gcc*' 
Note, selecting 'gconf' for regex 'gcc*' 
Note, selecting 'gcc-powerpc64le-linux-gnu' for regex 'gcc*' 
Note, selecting 'gcc-4.5-powerpc-linux-gnu' for regex 'gcc*' 
Note, selecting 'gcc-4.7-arm-linux-gnueabi-base' for regex 'gcc*' 
Note, selecting 'gcc-4.8-arm-linux-gnueabihf-base' for regex 'gcc*' 
Note, selecting 'libgcal0' for regex 'gcc*' 
Note, selecting 'gcj-powerpc64le-linux-gnu' for regex 'gcc*' 
Note, selecting 'libgcr-base-3-1' for regex 'gcc*' 
Note, selecting 'gccgo-4.8-doc' for regex 'gcc*' 
Note, selecting 'libghc-uuagc-cabal-doc' for regex 'gcc*' 
Note, selecting 'gceph' for regex 'gcc*' 
Note, selecting 'libgconfmm-2.6-dev' for regex 'gcc*' 
Note, selecting 'gcin-gtk3-immodule' for regex 'gcc*' 
Note, selecting 'gcc-m68hc1x' for regex 'gcc*' 
Note, selecting 'libgcc-4.8-dev-armhf-cross' for regex 'gcc*' 
Note, selecting 'libghc-svgcairo-prof-0.12.1-becda' for regex 'gcc*' 
Note, selecting 'gir1.0-gconf-2.0' for regex 'gcc*' 
Note, selecting 'gcompris-sound-lt' for regex 'gcc*' 
Note, selecting 'gcrystal' for regex 'gcc*' 
Note, selecting 'libxml-commons-resolver1.1-java-gcj' for regex 'gcc*' 
Note, selecting 'eclipse-pde-gcj' for regex 'gcc*' 
Note, selecting 'libsfgcc1-dbg-armhf-cross' for regex 'gcc*' 
Note, selecting 'libgconfmm-2.6-1c2' for regex 'gcc*' 
Note, selecting 'libghc-uuagc-cabal-dev-1.0.4.0-b5c8b' for regex 'gcc*' 
Note, selecting 'logcentral-tools' for regex 'gcc*' 
Note, selecting 'gcc-4.6-locales' for regex 'gcc*' 
Note, selecting 'gccgo-4.8-powerpc64le-linux-gnu' for regex 'gcc*' 
Note, selecting 'gcompris-sound-mr' for regex 'gcc*' 
Note, selecting 'libgcrypt11-doc' for regex 'gcc*' 
Note, selecting 'gcl-doc' for regex 'gcc*' 
Note, selecting 'gcc-4.8-multilib-powerpc-linux-gnu' for regex 'gcc*' 
Note, selecting 'libgcrypt11' for regex 'gcc*' 
Note, selecting 'gcompris-sound-nb' for regex 'gcc*' 
Note, selecting 'libtagc0' for regex 'gcc*' 
Note, selecting 'gcompris-sound-ast' for regex 'gcc*' 
Note, selecting 'libghc-gconf-prof' for regex 'gcc*' 
Note, selecting 'gcompris-sound-nl' for regex 'gcc*' 
Note, selecting 'libgcr-3-common' for regex 'gcc*' 
Note, selecting 'gcompris-sound-nn' for regex 'gcc*' 
Note, selecting 'gcc-4.9-base' for regex 'gcc*' 
Note, selecting 'libgcj11' for regex 'gcc*' 
Note, selecting 'ecj-bootstrap-gcj' for regex 'gcc*' 
Note, selecting 'librepository-java-gcj' for regex 'gcc*' 
Note, selecting 'libgcj14' for regex 'gcc*' 
Note, selecting 'libgcr-ui-3-1' for regex 'gcc*' 
Note, selecting 'gccgo-go' for regex 'gcc*' 
Note, selecting 'libsfgcc-4.7-dev-armhf-cross' for regex 'gcc*' 
Note, selecting 'libgck-1-doc' for regex 'gcc*' 
Package 'libjaxp1.3-java-gcj' is not installed, so not removed 
Package 'libsaxon-java-gcj' is not installed, so not removed 
Package 'libsigc++-2.0-dev' is not installed, so not removed 
Package 'libsigc++-2.0-doc' is not installed, so not removed 
Package 'libtagc0' is not installed, so not removed 
Package 'libtagc0-dev' is not installed, so not removed 
Package 'libtagcoll2-dev' is not installed, so not removed 
Package 'libx32gcc-4.7-dev' is not installed, so not removed 
Package 'libx32gcc-4.8-dev' is not installed, so not removed 
Package 'libx32gcc1' is not installed, so not removed 
Package 'libx32gcc1-dbg' is not installed, so not removed 
Package 'libxerces2-java-gcj' is not installed, so not removed 
Package 'libxml-commons-resolver1.1-java-gcj' is not installed, so not removed 
Package 'logcheck' is not installed, so not removed 
Package 'logcheck-database' is not installed, so not removed 
Package 'pulseaudio-module-gconf' is not installed, so not removed 
Package 'pulseaudio-module-gconf-dbg' is not installed, so not removed 
Package 'colorgcc' is not installed, so not removed 
Package 'compizconfig-backend-gconf' is not installed, so not removed 
Package 'docbook-xsl-saxon-gcj' is not installed, so not removed 
Package 'fcitx-libs-gclient' is not installed, so not removed 
Package 'fcitx-table-bingchan' is not installed, so not removed 
Package 'gcal' is not installed, so not removed 
Package 'gcal-common' is not installed, so not removed 
Package 'gcalcli' is not installed, so not removed 
WARNING: The following essential packages will be removed. 
This should NOT be done unless you know exactly what you are doing! 
    apt libapt-pkg4.12 (due to apt) libc6 (due to apt) libgcc1 (due to apt) libstdc++6 (due to apt) gnupg (due to apt) base-files base-passwd libdebconfclient0 (due to base-passwd) bash debianutils (due to 
    bash) dash (due to bash) libtinfo5 (due to bash) bsdutils coreutils libacl1 (due to coreutils) libattr1 (due to coreutils) libselinux1 (due to coreutils) dpkg (due to dash) diffutils libbz2-1.0 (due to 
    dpkg) liblzma5 (due to dpkg) zlib1g (due to dpkg) tar (due to dpkg) e2fsprogs e2fslibs (due to e2fsprogs) libblkid1 (due to e2fsprogs) libcomerr2 (due to e2fsprogs) libss2 (due to e2fsprogs) libuuid1 
    (due to e2fsprogs) util-linux (due to e2fsprogs) findutils grep install-info (due to grep) libpcre3 (due to grep) gzip hostname libc-bin libcap2 (due to libc-bin) login libpam0g (due to login) 
    libpam-runtime (due to login) libpam-modules (due to login) mount libmount1 (due to mount) ncurses-bin perl-base sed tzdata (due to util-linux) debconf (due to util-linux) sysv-rc (due to util-linux) 
    libncurses5 (due to util-linux) libslang2 (due to util-linux) 
0 upgraded, 0 newly installed, 1636 to remove and 0 not upgraded. 
After this operation, 3,222 MB disk space will be freed. 
You are about to do something potentially harmful. 
To continue type in the phrase 'Yes, do as I say!' 
?] yes 
Abort.

來源

2017-07-29 Alpha OF

你可以訪問https://askubuntu.com。這個網站只針對編程問題 –

試試下面的命令來修復損壞的軟件包：

sudo apt-get update 
sudo apt upgrade 
dpkg --get-selections | grep hold 
sudo apt-get autoremove

看看它是否工作。

編輯：你可以嘗試這些命令太

sudo apt-get autoclean 
apt-get clear cache

編輯＃2：

用文本編輯器，編輯您的/etc/apt/sources.list文件，以便它具有以下內容：

#------------------------------------------------------------------------------# 
#       OFFICIAL UBUNTU REPOS        # 
#------------------------------------------------------------------------------# 


###### Ubuntu Main Repos 
deb http://us.archive.ubuntu.com/ubuntu/ trusty main universe 
deb-src http://us.archive.ubuntu.com/ubuntu/ trusty main universe 

###### Ubuntu Update Repos 
deb http://us.archive.ubuntu.com/ubuntu/ trusty-security main universe 
deb http://us.archive.ubuntu.com/ubuntu/ trusty-updates main universe 
deb-src http://us.archive.ubuntu.com/ubuntu/ trusty-security main universe 
deb-src http://us.archive.ubuntu.com/ubuntu/ trusty-updates main universe 

###### Ubuntu Partner Repo 
deb-src http://archive.canonical.com/ubuntu trusty partner 

###### Ubuntu Extras Repo 
deb http://extras.ubuntu.com/ubuntu trusty main 
deb-src http://extras.ubuntu.com/ubuntu trusty main 

###### For LLVM 
deb http://apt.llvm.org/trusty/ llvm-toolchain-trusty-3.9 main 
deb-src http://apt.llvm.org/trusty/ llvm-toolchain-trusty-3.9 main

（注：這是一件好事修改它之前創建的sources.list的備份）

之後，運行這篇文章頂部的所有命令（sudo apt-get update ... sudo apt uprgrade ... etc ..等等..）。然後運行命令來下載llvm。希望它有效。

來源

2017-07-29 17:26:31 travisjayday

這似乎不適用於我，執行'apt-get clear cache'時出現錯誤信息：無效操作清除 –

@AlphaOF其中命令成功了嗎？另外，你有沒有添加一個自定義的PPA？ – travisjayday

我使用的是windows，我的Ubuntu是一個在VMWare上運行的虛擬機，我用它並不是那麼多，我不記得我在虛擬機上做了什麼。我運行它的時間是4-5個月前。順便說一下，命令「appitude」也不起作用。 –

如何在ubuntu14.04

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