gfortran

问题 I have a little Problem reading a file in Fortran. As you can see I am lopping over a file reading certain records with a specific length. What happens is, when it comes to a certain record I'm getting an IOSTAT Error 5002. Now my question is what does this error mean: is it end of file or there is no record left or something else? Can I ignore it? I am using MinGW GFortran 4.8.0. Here's the code: PROGRAM test_read INTEGER*4 HCM_error DOUBLE PRECISION N_Record(22) CHARACTER*8 C_Record(22)

问题 I am still green to debugging F77 and am having some problems with array bounds. I recently modified a lengthy code to have new array sizes. Everything 'seemed' okay until I noticed methods to alter one array, altered another. Somewhere in this code, I assume, an assignment is out of bounds and writing to the other arrays. Is there a debugger/tool in the linux environment that will 'catch' the out of bounds exception? I am currently using gfortran 回答1: There is a flag for gfortran to insert

问题 I'm trying to compile some old fortran77 programs with gfortran and getting error with allocatable arrays. If I define arrays in f90-style, like: REAL*8,allocatable::somearray(:) everything is fine, but in those old programs arrays defined as: REAL*8 somearray[ALLOCATABLE](:) which cause gfortran error output: REAL*8,allocatable::somearray[ALLOCATABLE](:) 1 Fatal Error: Coarrays disabled at (1), use -fcoarray= to enable I really wish to avoid rewriting whole programs to f90 style, so, could

问题 Ultimately I am trying to write an IPC calculator making use of Fortran to calculate and C to pass the data between the two Fortran programs. When I am done it will hopefully look like: Fortran program to pass input -> Client written in C -> Server written in C -> Fortran program to calculate input and pass ans back The C client/server part is done, but at the moment I am stuck trying to write a program that takes input in a Fortran program, passes it to a C program that calculates the answer

问题 I'm trying to compile a project I recently started working on, and was asked to compile the code in clang instead of gcc. There is a CMake file for the project, and I tried to cmake the project using cmake -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ ../src However an error is thrown, which I believe is because clang doesn't have a Fortran compiler and part of the project has Fortran code. Is there a way to make it use gfortran (previously used when gcc is used) when compiling the

问题 In How to pass subroutine names as arguments in Fortran? we learned how to pass subroutine names as arguments in Fortran. How can we do this inside a class structure? The ensuing code produces the following compilation error using GNU Fortran (GCC) 5.1.0: gfortran -Wall -Wextra -Wconversion -Og -pedantic -fcheck=bounds -fmax-errors=5 class_pass.f08 myClass.f08:44:30: class ( test ), target :: me 1 Error: Derived type ‘test’ at (1) is being used before it is defined myClass.f08:9:21: procedure

问题 I can't seem to figure out why this isn't working. /* main.cpp */ #include <stdio.h> extern "C" { int __stdcall inhalf(int *); } int main() { int toHalf = 2; int halved = inhalf(&toHalf); printf("Half of 2 is %d", halved); return 0; } Ok, that looks good. $ g++ -c main.cpp No errors. ! functions.f90 function inhalf(i) result(j) integer, intent(in) :: i integer :: j j = i/2 end function inhalf I'm pretty sure that's right. $ gfortran -c functions.f90 So far so good... $ gcc -o testo main.o

问题 I am having trouble correctly accessing a variable in a Fortran DLL from a Fortran EXE when the variable is part of a COMMON block. I have a trivial code simple.f90 which I compile into a DLL using MSYS64/MinGW-w64 gfortran 9.2 as x86_64-w64-mingw32-gfortran simple.f90 -o simple.dll -shared ! simple.f90 module m implicit none integer :: a, b !common /numbers/ a, b end module subroutine init_vals use m implicit none a = 1 b = 2 end subroutine This library is used from a even simpler program

问题 I recently updated my operating system from OS X 10.8 to OS X 10.9. Most of the applications still worked after the update, but one of the applications that did not work was g95 (my fortran compiler I use for class). I thought I was compiling faulty code until I tried compiling it on another machine. It seems as though the linker ld is missing a library that was not carried over in the update. The full error is produced on every compile time (as long as there are no syntax errors) ld: library

问题 I want to load the same .so file twice as separate instances. Based on the example, I have created the app with two dlopen commands. However, I was facing some issues and I understood that dlmopen should be used if I am using multiple instances of a same .so . However, I don't know how to pass the arguments. Can someone help me how to do this in GFortran? My code is as below, program example use :: iso_c_binding implicit none integer(c_int), parameter :: rtld_lazy=1 ! value extracte from the