I've always been using the -fdefault-real-8 option of gfortran to automatically promote every single REAL declared anywhere in the program to double precision, along with any constant, e.g. 1.23. I...

Is there a way of disabling the line length limit in the gfortran compiler? I am porting from ifort to gfortran and I wonder if there is an easy way to do so without going through the code and intr...

I am trying to deploy a python application on aws lambda. It has several large python dependencies, the largest being scipy and numpy. The result is that my application is significantly larger than...

I have tried many workarounds (brew upgrade/update, brew doctor, reinstalling gcc and gfortran, exporting libraries path etc.) to solve this issues, but none of them succeeded. When I try to execut...

It is my understanding that Fortran, when reading data from file, will skip lines starting with and asterisk (*) assuming that they are a comment. Well, I seem to be having a problem with achieving...

I am trying to compile a C++/Fortran program using conda on an Ubuntu 18.04 server where I do not have superuser rights. I am able to compile correctly the program with the same source code on my U...

I'm looking for a bulletproof way of converting logical type variables to real type that will work in both ifort and gfortran. The following works in ifort, but not in gfortran: logical :: a real ...

I recently started using f2py and python2.7 for working on some codes related to an ocean model (ROMS) in Fortran. My workstation specifics are Ubuntu 16.04 with python2.7, anaconda2 and gfortran. ...

I am working with a source code that might have been written before the most recent version of gfortran. I'm aware that the way DO, END DO, and CONTINUE has changed so that there can not be shared ...

I'm learning Fortran and I'd like to encapsulate an array and a subroutine in a type. The problem appears to be in the type definition of the self-object. This is the minimal test case I came up w...

I have recently learned how to work with basic files in Fortran and I assumed it was as simple as: open(unit=10,file="data.dat") read(10,*) some_variable, somevar2 close(10) So I can't underst...

Modern Fortran contains various object-oriented ideas, including a concepts of "destructors" through the FINAL keyword. MODULE mobject TYPE :: tobject ! Data declarations CONTAINS FINAL :: fin...

I am currently working with old code, that calls the iand function with integers of different kinds as arguments. Here's a small example of what the code includes: program test integer*1 i integ...

My supervisor has asked that I install a fortran compiler on my mac and suggested using MacPorts to install gcc6. I have tried to install gcc6 a number of times but each time it doesn't seem to com...

I am running a loop in a Fortran program compiled with gfortran that outputs numerical values to an output file for each iteration of the loop. The problem is that the output is not saved to the fi...

Here is a funny problem I am encountering with R and Fortran. Consider the following Fortran subroutine: ! foo.f90 subroutine fun(n, x) implicit none integer, intent(in) :: n logical, intent(i...

It is very simple query but I'm not able to find the exact solution. How to break to new line when printing in Fortran? for example print*,'This is first line' print*,'This is second line' I w...

I have a simple fortran function that computes the Kronecker product: function kron(A, B) implicit none real, intent(in) :: A(:, :), B(:, :) integer :: i, j, ma, na, mb, nb real, dimension(:, ...

I'm currently using gfortran 4.9.2 and I was wondering if the compiler actually know hows to take advantage of the DO CONCURRENT construct (Fortran 2008). I know that the compiler "supports" it, bu...

The GNU Extension to the GNU Fortran compiler provides the subroutine GETCWD() that well, gets the current working directory. However, my code has to be portable to the ifort and nagfor compiler as...

I can call compile this fortran code 'test.f90' subroutine test(g,o) double precision, intent(in):: g double precision, intent(out):: o o=g*g end subroutine with gfortran -shared -fPIC test.f90...

In a Fortran program, I need to compute several expressions like M · v, MT · v, MT · M, M · MT, etc ... Here, M and v are 2D and 1D arrays of small size (less than 100, ...

Is there is a way to put .mod files, generated by gfortran (GCC), into a separate output directory? I know how to place object files or other output with the -o flag as in: gfortran -c test.f03 -o...

Is there a way to force flush-to-zero of underflows in gfortran? I can't believe this is the first time someone has asked this, but I couldn't find anything on it anywhere. Mea culpa if this is a ...

Experience: fortran for about 3 months python - intermediate : never used the ctypes module in python before this I was looking for a way to use the fortran code for my doctoral work in python - s...