! { dg-do compile } ! { dg-options "-Wc-binding-type" } ! This should compile, though there is a warning about the type of len ! (return variable of strlen()) for being implicit. ! PR fortran/32797 ! MODULE ISO_C_UTILITIES USE ISO_C_BINDING implicit none CHARACTER(C_CHAR), DIMENSION(1), SAVE, TARGET, PRIVATE :: dummy_string="?" CONTAINS FUNCTION C_F_STRING(CPTR) RESULT(FPTR) use, intrinsic :: iso_c_binding TYPE(C_PTR), INTENT(IN) :: CPTR ! The C address CHARACTER(KIND=C_CHAR), DIMENSION(:), POINTER :: FPTR INTERFACE FUNCTION strlen(string) RESULT(len) BIND(C,NAME="strlen") ! { dg-warning "Implicitly declared" } USE ISO_C_BINDING TYPE(C_PTR), VALUE :: string ! A C pointer END FUNCTION END INTERFACE CALL C_F_POINTER(FPTR=FPTR, CPTR=CPTR, SHAPE=[strlen(CPTR)]) END FUNCTION END MODULE ISO_C_UTILITIES