[PATCH] Fortran: function results never have the ALLOCATABLE attribute [PR109500]

Dear all, Fortran 2018 added a clarification that the *result* of a function whose result *variable* has the ALLOCATABLE attribute is a *value* that itself does not have the ALLOCATABLE attribute. For those interested: there was a thread on the J3 mailing list some time ago (for links see the PR)

Re: [PATCH v3] libgfortran: Replace mutex with rwlock

Hi Bernhard, Thanks for your questions and suggestions. The rwlock could allow multiple threads to have concurrent read-only access to the cache/unit list, only a single writer is allowed. Write lock will not be acquired until all read lock are released. And I didn't change the mutex scope when