HDF5 does not build on macOS Monterey with GCC 11.2

[eschnett]

I want to build HDF5 1.10.7 with GCC 11.2 on macOS Monterey. This used
to work fine on the previous version of macOS. It currently fails
because the autodetection of the Fortran kind variables fails. I tried
HDF5 1.10.6 and 1.12.1 as well, with the same result.

I found that the problem is that the output file is not closed by the
Fortran program that is run at configuration time. The enclosed patch
corrects the issue by adding respective "close" statements that are
present in all other, similar Fortran programs.

--- a/config/cmake/HDF5UseFortran.cmake
+++ a/config/cmake/HDF5UseFortran.cmake
@@ -181,6 +181,7 @@
          WRITE(8,'(I0)') max_decimal_prec
          WRITE(8,'(I0)') num_ikinds
          WRITE(8,'(I0)') num_rkinds
+         CLOSE(8)
       END PROGRAM FC_AVAIL_KINDS
   "
 )
--- a/m4/aclocal_fc.f90
+++ b/m4/aclocal_fc.f90
@@ -151,6 +151,7 @@
      WRITE(8,'(I0)') max_decimal_prec
      WRITE(8,'(I0)') num_ikinds
      WRITE(8,'(I0)') num_rkinds
+     CLOSE(8)
 END PROGRAM FC_AVAIL_KINDS
 !---- END ----- Determine the available KINDs for REALs and INTEGERs
 

[byrnHDF]

#969 and other merges fix this issue.