[flang] Fortran pointer shall not be allowed as a memeber of a BIND(C) common block

[DanielCChen]

Consider the following code:

module mod
implicit none
bind(c) ::  /blk/
common /blk/ x
integer, pointer :: x
end module

x should not be allowed as the member of bind(c) common block blk as x that has the POINTER attribute is not C-interoparable.

[llvmbot]

@llvm/issue-subscribers-flang-frontend

Author: Daniel Chen (DanielCChen)

Consider the following code: ``` module mod implicit none bind(c) :: /blk/ common /blk/ x integer, pointer :: x end module ```

x should not be allowed as the member of bind(c) common block blk as x that has the POINTER attribute is not C-interoparable.