Hi, everyone! I’m new to Julia and I’m trying to implement some existing Fortran libraries to use in Julia code. However, the ccall function does not appear to change the values of variables which I pass to it. A simplified version of Fortran code is: SUBROUTINE TEST (IOPT,PARMOD,PS,X,Y,Z,VX,VY,…

For mutable scalar variables, you need to wrap in Ref: see “Calling C and Fortran code: Passing pointers for modifying inputs” in the manual (the description mentions C, but applies to Fortran too). Also note that the default kind for REAL in Fortran is usually Float32.

Using compiled Fortran shared library

New to Julia

Mattriks September 29, 2018, 10:29pm 3

There are some simple examples here:

1 Like

Topic		Replies	Views
Error calling Fortran from Julia General Usage question	6	572	February 15, 2021
Create interface to fortran modules with ccall New to Julia ccall , fortran	6	2116	January 17, 2017
Pointer (Julia) not modified after ccall to C function which uses another C function General Usage ccall	16	1941	April 21, 2018
Fortran + Julia General Usage fortran	9	2246	January 18, 2019
Calling Fortran variables from Julia New to Julia question , fortran	3	1452	August 8, 2019

Using compiled Fortran shared library

Related topics