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! Test: procedure dummy passed through to another routine without being called
subroutine inner(func, x, y)
implicit none
double precision :: func
external :: func
double precision, intent(in) :: x
double precision, intent(out) :: y
y = func(x)
end subroutine inner
subroutine outer(f, a, b)
implicit none
double precision :: f
external :: f
double precision, intent(in) :: a
double precision, intent(out) :: b
call inner(f, a, b)
end subroutine outer
double precision function myfunc(x)
implicit none
double precision, intent(in) :: x
myfunc = x * 2.0d0
end function myfunc
program present_06
implicit none
double precision :: result
double precision, external :: myfunc
call outer(myfunc, 2.0d0, result)
if (abs(result - 4.0d0) > 1.0d-10) error stop "Expected 4.0"
print *, "PASS"
end program present_06
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