R CMD SHLIB fortran_file.95

[waynelapierre]

I am not sure if this is the appropriate place to ask this question. I saw your conversations on the R-SIG-Fedora mailing list. I encountered a strange warning message when interfacing R with Fortran in Fedora 34. Whenever I run the R CMD SHLIB fortran_file.95 command, I receive this warning message:

f951: Warning: ‘-Werror=’ argument ‘-Werror=format-security’ is not valid for Fortran

I suspect that Fedora R is sending this wrong flag to gfortran. I installed R by running sudo dnf install R. My session information is as follows:

R version 4.0.5 (2021-03-31)
Platform: x86_64-redhat-linux-gnu (64-bit)
Running under: Fedora 34 (Workstation Edition)

gcc (GCC) 11.1.1 20210531 (Red Hat 11.1.1-3)

I saw other people have this issue.
r-spatial/classInt#27

[Enchufa2]

I am not sure if this is the appropriate place to ask this question. I saw your conversations on the R-SIG-Fedora mailing list.

The R-SIG-Fedora mailing list is the proper place for this.

I encountered a strange warning message when interfacing R with Fortran in Fedora 34. Whenever I run the R CMD SHLIB fortran_file.95 command, I receive this warning message:

f951: Warning: ‘-Werror=’ argument ‘-Werror=format-security’ is not valid for Fortran

It's just a warning, not an error. The Fortran compiler just ignores this flag and proceeds, it's fine.

I suspect that Fedora R is sending this wrong flag to gfortran.

This is a system-wide flag in Fedora for gcc. Fortran, as I said, doesn't use it, but this warning is a small price to pay for increased security.