TheRock/compiler/amd-llvm/flang/test/Semantics/global01.f90

! RUN: %python %S/test_errors.py %s %flang_fc1 -Werror
! Catch discrepancies between a local interface and a global definition

subroutine global1(x)
  integer, intent(in) :: x
end subroutine

subroutine global2(x) bind(c,name="xyz")
  integer, intent(in) :: x
end subroutine

subroutine global3(x)
  integer, intent(in) :: x
end subroutine

pure subroutine global4(x)
  integer, intent(in) :: x
end subroutine

subroutine global5(x)
  integer, intent(in) :: x
end subroutine

! Regression check: don't emit bogus "Implicit declaration of function 'global7' has a different result type than in previous declaration"
recursive function global6()
  integer global6, z, n
entry global7(n) result(z)
  if (n > 0) z = global7(n-1)
end function

program test
  interface
    !WARNING: The global subprogram 'global1' is not compatible with its local procedure declaration (incompatible dummy argument #1: incompatible dummy data object types: INTEGER(4) vs REAL(4)) [-Wexternal-interface-mismatch]
    subroutine global1(x)
      real, intent(in) :: x
    end subroutine
    subroutine global2(x)
      real, intent(in) :: x
    end subroutine
    subroutine global3(x) bind(c,name="abc")
      real, intent(in) :: x
    end subroutine
    subroutine global4(x) ! not PURE, but that's ok
      integer, intent(in) :: x
    end subroutine
    !WARNING: The global subprogram 'global5' is not compatible with its local procedure declaration (incompatible procedure attributes: Pure) [-Wexternal-interface-mismatch]
    pure subroutine global5(x)
      integer, intent(in) :: x
    end subroutine
    function global6()
      integer global6
    end function
    function global7(n) result(z)
      integer n, z
    end function
  end interface
end