fatal error: itensor/config.h: No such file or directory about itensor HOT 3 OPEN

Thanks for asking. I notice that you write "ITensor/itensor" with one of them capitalized. Is that the name of the folder that the ITensor source code is actually in?

More generally, what is the folder on your computer holding the code?

Also, did you happen to move the folder after creating it and/or unpacking the .tar.gz file?

Lastly, what Makefile are you using?

from itensor.

ITensor is the name of the unzipped folder. The inside of the folder has exactly these files:
https://github.com/ITensor/ITensor

Inside of ITensor/ITensor has exactly the files:
https://github.com/ITensor/ITensor/tree/v3/itensor
(There doesn't seem to be a config.h in either on my computer or the github version)

In another laptop where I installed itensor couple of years ago, I see the file config.h in that directory.

ITensor is the directory that the .tar.gz file was extracted into. I did not move the files after unzipping.

I am using the makefile in the /ITensor/tutorial/01_one_site and /ITensor/tutorial/01_two_site as-is.

from itensor.

Thanks! I see. That's the right Makefile to use for your own project based on ITensor.

Did you build the ITensor Library itself? That is, did you do the steps described in the file INSTALL.md? Thanks.

Those steps are what should generate the config.h file for you. (It is a detail of the building of the library you aren't supposed to need to know about, but I understand here it came up in the error message you saw.)

from itensor.