The gcc-compiler suite version 5.5.0 is installed here; just re-installed all versions. However, neither numpy nor numpy3 will build. They fail almost instantly with this error:

File "/tmp/SBo/numpy-1.14.3/numpy/distutils/fcompiler/gnu.py", line 83, in gnu_version_match
raise ValueError(err + version_string)
ValueError: A valid Fortran version was not found in this string:
stderr is not a tty - where are you?
5.5.0

A web search for the value error returns hits on selecting the fortran compiler for f2py, and nothing relevant to the error encountered here.

I don't understand why the installed gfortran is not seen by these packages. Explanations are needed so I can fix this issue on both numpy versions.

I think the error is coming from the Fortran compiler when numpy tries to query the version. What is the output of

(Run it in the same environment where you are trying to build numpy. For example, if you are doing it over SSH, then run this command over SSH too.) Also, this is a very old thread, but maybe it will be of some help:

https://www.linuxquestions.org/quest...re-you-215918/

1 members found this post helpful.

Montagdude,

The version of gfortran dumped is 5.5.0 and this is shown on the last line of the failure report. This is what puzzles me: if the ValueError is not finding a valid Fortran version why does the process display the number of the installed Fortran version?

Thanks,

Rich

What I think is happening is that when the installer runs the command `gfortran -dumpversion`, for some reason gfortran is first printing "stderr is not a tty - where are you?" and then the version. The "stderr is not a tty" part is confusing the installer, and it is unable to parse the version string correctly. Do you not see that error when you run `gfortran -dumpversion` manually?

Yes:

$ gfortran -dumpversion
5.5.0