The /warn:unused option does not catch many instances of unused variables in Ifort 16.0, and many checks are inhibited by the presence of contained routines of no relevance to catching unused variables.
Here is an example.
subroutine xyz(i,j,k)
integer p,q,r
p=2
q=p*2
return
!contains
!subroutine klm
!end subroutine
end
Compiling with /Od /warn:unused gives:
xyz.f90(1): remark #7712: This variable has not been used.
subroutine xyz(i,j,k)
---------------^
xyz.f90(1): remark #7712: This variable has not been used.
subroutine xyz(i,j,k)
-----------------^
xyz.f90(1): remark #7712: This variable has not been used.
subroutine xyz(i,j,k)
-------------------^
xyz.f90(2): remark #7712: This variable has not been used.
integer p,q,r
------------^
If the three comment marks are removed from lines 7,8 and 9, the output text from the compiler is reduced to:
xyz.f90(2): remark #7712: This variable has not been used.
integer p,q,r
------------^
even though the contained subroutine has no variables and has an empty body.
