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Beginner
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building a dll and an exe linking to it : fatal error LNK1107: invalid or corrupt file: cannot read at 0x2F0 or cannot run exe

I followed and adapted your links :

Coding Requirements for Sharing Procedures in DLLs

Building Dynamic-Link Libraries

and

Building Executables that Use DLLs

with the following codes :

The dll code :

function mysum(x,y) result(z)
    !DEC$ ATTRIBUTES DLLEXPORT :: mysum
    INTEGER x, y
    z = x+y
    end function mysum

function myprod(x,y) result(z)
    !DEC$ ATTRIBUTES DLLEXPORT :: myprod
    INTEGER x, y
    z = x*y
    end function myprod

in dll.F90 and the client code :

program CallingTheDLL
    !DEC$ ATTRIBUTES DLLIMPORT:: mysum
    !DEC$ ATTRIBUTES DLLIMPORT:: myprod
    integer i, j

    integer resS
    integer resP

    print*,"enter two integers"
    read (*,*) i,j
    resS = mysum(i, j)

    resP = myprod(i, j)

    print*,"Sum of ",i," and ",j," is = ",resS
    print*,"Product of ",i," and ",j," is = ",resP
    
    read(*,*)
end program CallingTheDLL

in client.F90.

The structure in the folder is :

I have a folder DLL_EXAMPLE containin two folders :

  • DLL that contains dll.F90
  • CLIENT that contains client.F90

In the folder DLL I run :

ifort /align:commons /dll dll.F90

which gives to me the output :

-out:dll.dll
-dll
-implib:dll.lib
dll.obj
   Creating library dll.lib and object dll.exp

then in the CLIENT I run :

ifort /align:commons /dll client.exe .\..\DLL\dll.obj /link .\..\DLL\dll.dll

which gives to me the outup :

-out:client.dll
-dll
-implib:client.lib
.\..\DLL\dll.dll
client.exe
.\..\DLL\dll.obj
.\..\DLL\dll.dll : fatal error LNK1107: invalid or corrupt file: cannot read at 0x2F0

Remark : if I run

ifort -o client.exe /dll .\..\DLL\dll.obj /link .\..\DLL\dll.lib

instead I don't have an error, and have this output :

-out:client.exe
-dll
-implib:client.lib
.\..\DLL\dll.lib
.\..\DLL\dll.obj
   Creating library client.lib and object client.exp

but when I double click the exe I have a windows 10 pop up "This app can't run on your PC" and if I try to run it from the command line, I have :

C:\WORK\CODING\MY\SHIT\FORTRAN\TOYING\DLL_EXAMPLE>.\CLIENT\client.exe
Access is denied.

Adding `/align:commons` or not doesn't change anything.

What did I do wrong and how to correct ?

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Highlighted
Beginner
166 Views

Ok, this command did the job :

ifort client.F90 ..\DLL\dll.lib

And I need to have `dll.dll` and `dll.lib` in the same folder (CLIENT) as `client.exe` for the latter to run properly.

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