re PR fortran/57048 (Handling of C_PTR and C_FUNPTR leads to reject valid)

re PR fortran/57048 (Handling of C_PTR and C_FUNPTR leads to reject valid)

2019-02-02  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/57048
	Backport from trunk
	* interface.c (gfc_compare_types): If a derived type and an
	integer both have a derived type, and they are identical,
	this is a C binding type and compares equal.

2019-02-02  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/57048
	Backport from trunk
	* gfortran.dg/c_funptr_1.f90: New file.
	* gfortran.dg/c_funptr_1_mod.f90: New file.

From-SVN: r268478