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SU2 build from source on WSL (invalid syntax in mesonmain.py)

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Old   April 26, 2023, 12:49
Default SU2 build from source on WSL (invalid syntax in mesonmain.py)
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Hi,

I am new to SU2 and I am trying to install and build from the source code of SU2 on WSL Ubuntu 16.04. However, I kept getting errors in the meson build process on the website. It might be something stupid but I would appreciate it if anyone could help me with it.

I firstly cloned the GitHub repo to the local directory by:
git clone https://github.com/su2code/SU2.git

then I run the meson file
./meson.py build

The code seems to be running for a while, downloading something (I assume they are prerequisites) in subprojects/ folder. Then I got this error in the following:

$ ./meson.py ./build
......
......
Checking connectivity... done.
Submodule path 'externals/mel': checked out '2484cd3258ef800a10e361016cb341834ee7930b'
ninja executable not found. Building ...
bootstrapping ninja...
warning: A compatible version of re2c (>= 0.11.3) was not found; changes to src/*.in.cc will not affect your build.
wrote build.ninja.
bootstrap complete. rebuilding...
[29/29] LINK ninja
Traceback (most recent call last):
File "./meson.py", line 83, in <module>
from mesonbuild import mesonmain
File "/mnt/c/Users/NAME/Work/Code/SU2/externals/meson/mesonbuild/mesonmain.py", line 191
mlog.error(f'Error in {script_name} helper script:')
^
SyntaxError: invalid syntax


I am not sure what is happening here. Could anyone please help with me? Thank you very much.
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Old   April 27, 2023, 06:17
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Thanks guys I just figured it out. It is the python version's issue. I was using Python3.5 but meson requires at least Python 3.7. Apologies for the confusions.
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