[MacPorts] #63606: mpich: update to support gcc11

[MacPorts]

#63606: mpich: update to support gcc11
---------------------+----------------------
 Reporter:  mascguy  |      Owner:  mascguy
     Type:  defect   |     Status:  assigned
 Priority:  Normal   |  Milestone:
Component:  ports    |    Version:
 Keywords:  gcc-11   |       Port:  mpich
---------------------+----------------------
 When this was last tested earlier in 2021, compilation failed for various
 reason.

 On ARM, the build dies immediately after the configure phase is completed,
 with errors like the following:

 {{{
 libtool: compile:  /opt/local/bin/gfortran-mp-11
 -Isrc/binding/fortran/use_mpi -Isrc/binding/fortran/use_mpi_f08 -pipe -m64
 -O2 -Jsrc/binding/fortran/use_mpi_f08 -c
 src/binding/fortran/use_mpi_f08/mpi_f08_types.f90  -fno-common -o
 src/binding/fortran/use_mpi_f08/.libs/mpi_f08_types.o
 src/binding/fortran/use_mpi_f08/mpi_f08_types.f90:355:17:
   355 |     real(real128),dimension(..) :: x
       |                 1
 Error: Kind -1 not supported for type REAL at (1)
 src/binding/fortran/use_mpi_f08/mpi_f08_types.f90:385:20:
   385 |     complex(real128),dimension(..) :: x
       |                    1
 Error: Kind -1 not supported for type COMPLEX at (1)
 }}}

 But for Intel, there are complaints about array element alignment:

 {{{
 /bufattachf.c  -fno-common -DPIC -o src/binding/fortran/mpif_h/.libs
 /lib_libpmpi_la-bufattachf.o
 :info:build In file included from
 ./src/mpid/ch4/netmod/include/../ofi/ofi_impl.h:10,
 :info:build                  from
 ./src/mpid/ch4/netmod/include/../ofi/ofi_am.h:8,
 :info:build                  from
 ./src/mpid/ch4/netmod/include/../ofi/netmod_inline.h:9,
 :info:build                  from
 ./src/mpid/ch4/netmod/include/netmod_impl.h:1644,
 :info:build                  from ./src/mpid/ch4/include/mpidch4.h:322,
 :info:build                  from ./src/mpid/ch4/include/mpidpost.h:10,
 :info:build                  from ./src/include/mpiimpl.h:241,
 :info:build                  from
 src/binding/fortran/mpif_h/mpi_fortimpl.h:117,
 :info:build                  from
 src/binding/fortran/mpif_h/bufattachf.c:8:
 :info:build ./src/mpid/ch4/netmod/include/../ofi/ofi_types.h:326:5: error:
 size of array element is not a multiple of its alignment
 :info:build   326 |     MPIDI_OFI_cacheline_mutex_t
 mutexes[MAX_OFI_MUTEXES];
 :info:build       |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~
 }}}

 We should investigate further - including any potential upstream patches -
 to see if it's easily fixable.

-- 
Ticket URL: <https://trac.macports.org/ticket/63606>
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