cmake problem on tutorial 1

[Tony Zhuang]

Hi,

I have downloaded deal.ii 9.1.1 on ubuntu 19.04, and during the installation(https://www.dealii.org/9.1.1/readme.html) I found that I have to change the directory to install

from: cmake -DCMAKE_INSTALL_PREFIX=/path/to/install/dir ../deal.II 

to: cmake -DCMAKE_INSTALL_PREFIX=/path/to/install/dir ../dealii-9.1.1

And the make test showed the installation was complete.

However, when I get start on the tutorial and input cmake . in terminal, it showed it couldn't located deal.II. I have tried:

cmake -DDEAL_II_DIR=/path/to/installed/deal.II .

cmake -DDEAL_II_DIR=/path/to/installed/dealii-9.1.1 .

But they didn't work.(Please refer to attachment)

I also found that if I change deal.II 9.1.0 to deal.II 9.0 in CMakeLists.txt, cmake . could run but some errors occuered on the following steps.(Please refer to the 2nd screenshot) And when I open the step-1.cc with VScode, it flags that I have include errors. How to solve the cmake . problem?

#include errors detected. Please update your includePath. Squiggles are disabled for this translation unit (/home/tonyz/dealii-9.1.1/examples/step-1/step-1.cc).C/C++(1696)

cannot open source file "mpi.h" (dependency of "/home/tonyz/dealii-9.1.1/examples/step-1/step-1.cc")C/C++(1696)

Thanks a lot!

HosaH

Regards,

Zhuang

[llf m]

Dear Zhuang,

In the command

cmake -DDEAL_II_DIR=/path/to/installed/deal.II .

"/path/to/installed/deal.II" is the path you have installed dealii into, you need to change it to the path you actually installed in.

In your above comment

cmake -DCMAKE_INSTALL_PREFIX=/path/to/install/dir ../dealii-9.1.1

if you donot change the "-DCMAKE_INSTALL_PREFIX=/path/to/install/dir" to any other path, you may need to change the DEAL_II_DIR:

cmake -DDEAL_II_DIR=/path/to/install/dir .

, and you change the dealii version in the CMakelist.txt in step-1 directly, then it will use the dealii-9.0 to configure.

You may have installed the dealii-9.0.0 before and the PATH DEAL_II_DIR may link to dealii-9.0.

And step-1 donot need mpi.h, it maybe just is a fake hints in VScode, and if you want VScode to know your code and give code complement&highlight then you should add the include path to VScode.That is another question, you may need the VScode extension "ms-vscode.cpptools " to complement code and highlight.

Best,

m.

在 2019年11月28日星期四 UTC+8下午7:00:07，Tony Zhuang写道：