Cannot use IMSL library - produces error

[nairsk]

I just purchased the Intel Visual Fortran Compiler Professional Edition with IMSL Math Library. I used an example code in the IMSL library and tried to compile it. The code is provided below.

use lin_sol_gen_int

use rand_gen_int

use error_option_packet

implicit none

! This is Example 1 for LIN_SOL_GEN.

integer, parameter :: n=32

real(kind(1e0)), parameter :: one=1e0

real(kind(1e0)) err

real(kind(1e0)) A(n,n), b(n,n), x(n,n), res(n,n), y(n**2)

! Generate a random matrix.

call rand_gen(y)

A = reshape(y,(/n,n/))

! Generate random right-hand sides.

call rand_gen(y)

b = reshape(y,(/n,n/))

! Compute the solution matrix of Ax=b.

call lin_sol_gen(A, b, x)

! Check the results for small residuals.

res = b - matmul(A,x)

err = maxval(abs(res))/sum(abs(A)+abs(b))

if (err <= sqrt(epsilon(one))) then

write (*,*) 'Example 1 for LIN_SOL_GEN is correct.'

end if

end

I used the following command to run this code on the C:\\ Prompt:

ifort Example_1.f90

It produced the following errors:

Error LNK2019: unresolved external symbol _S_RAND_GEN referenced in function _MAIN_

Error LNK2019: unresolved external symbol _S_LIN_SOL_GEN referenced in function _MAIN_

Could you help me resolve this and get going? Thanks.

[Steven_L_Intel1]

You need to tell the compiler to link to the IMSL libraries, and to which set of libraries. This is described in the on-disk documentation under Using Libraries > Using IMSL.

The easiest way is to add the following lines to your source, before the USE statements:

[fortran]include 'link_fnl_static.h'
!dec$ objcomment lib:'libiomp5md.lib'[/fortran]

For additional information, see Installing and Configuring the IMSL Libraries.