unable to create DLL file

[sivatt]

I was trying to create a DLL file that can be called by R. But got the following error msg:

Error 1 error LNK2019: unresolved external symbol _MAIN__ referenced in function _main libifcoremt.lib(for_main.obj)

Error 2 fatal error LNK1120: 1 unresolved externals Debug\\RobMNE.exe

Did I do anything wrong? Thanks.

The fortran code is quite simple:

subroutine compute_bj(x, y, w, b, lambda, sigma)

!dec$ attributes dllexport, decorate, alias : 'compute_bj' :: compute_bj

!dec$ attributes reference :: x, y, w, b, lambda, sigma

real, intent(in), dimension (:,:) :: x

real, intent(in), dimension (:) :: w, y

integer, dimension (:), allocatable :: ind, num, deno

real, intent(in) :: lambda, sigma

integer :: n, p, i, l

real, intent(inout), dimension (:) :: b

n = size(x, dim=1)

p = size(x, dim=2)

allocate(ind(p-1))

allocate(num(n))

allocate(deno(n))

do l = 1, p

ind = (/ 1:(l-1), (l+1):p /)

do i = 1, n

num(i) = w(i)*x(i,l)*(y(i)-dot_product(x(i,ind),b(ind)))

deno(i) = w(i)*x(i,l)**2

end do

b(l) = sum(num)/(2*lambda*sigma**2+sum(deno))

end do

deallocate(ind)

deallocate(num)

deallocate(deno)

end subroutine

[Steven_L_Intel1 · Accepted solution]

You did not include the /dll option when compiling from the command line, or if you were using Visual Studio, you created a Console project rather than a DLL Library project. Therefore, the compiler thought you were trying to build an EXE that has to have a main program.

[sivatt]

Thanks a lot Steve. Now the problem is solved!