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I get the following error when I try to use cmake to compile a source code:

$ sudo cmake -DUSE_QT5=1 -DCMAKE_INSTALL_PREFIX=/home/linux/myYade ../trunk

-- The CXX compiler identification is unknown CMake Error at CMakeLists.txt:35 (project): No CMAKE_CXX_COMPILER could be found.

Tell CMake where to find the compiler by setting either the environment variable "CXX" or the CMake cache entry CMAKE_CXX_COMPILER to the full path to the compiler, or to the compiler name if it is in the PATH.

-- Configuring incomplete, errors occurred! See also "/home/linux/myYade/trunk/CMakeFiles/CMakeOutput.log". See also "/home/linux/myYade/trunk/CMakeFiles/CMakeError.log".

Any help to get this resolved?

user3385220
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  • It looks like that I do not have g++ but I cannot install it either. I tried to install it by sudo apt-get install g++ but I get an error: The following packages have unmet dependencies: g++ : Depends: g++-7 (>= 7.3.0-12~) but it is not going to be installed E: Unable to correct problems, you have held broken packages. – user3385220 May 08 '19 at 19:44
  • So, the problem is not with CMake, but with `apt-get`. Have you tried to google for that error? E.g., look into given question: https://stackoverflow.com/questions/26571326/how-do-i-resolve-the-following-packages-have-unmet-dependencies/49041818. – Tsyvarev May 08 '19 at 20:09
  • Sure I did. But I'm more confused now. sudo apt-get update is also giving an error now: Ign:2 http://ppa.launchpad.net/yade-users/external/ubuntu bionic InRelease Err:3 http://ppa.launchpad.net/yade-users/external/ubuntu bionic Release 404 Not Found [IP: ] Reading package lists... Done E: The repository 'http://ppa.launchpad.net/yade-users/external/ubuntu bionic Release' does not have a Release file. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details. – user3385220 May 08 '19 at 20:36
  • Well, such problems with `apt-get` are more suitable for [ubuntu.se]: they are no a *programming* one, so Stack Overflow is a bad place for them. – Tsyvarev May 08 '19 at 21:12

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