Compile using gcc10

[k-yoshimi]

When you use gcc10 with MPI for compiling HPhi and receive the following error

  165 |   &  call MPI_allREDUCE(MPI_IN_PLACE, prod, 1, &
      |                                      1
......
  194 |   &  call MPI_allREDUCE(MPI_IN_PLACE, maxarray, 1, &
      |                                      2
Error: Type mismatch between actual argument at (1) and actual argument at (2) (COMPLEX(8)/REAL(8)).

please add the following option for cmake.
-DCMAKE_Fortran_FLAGS_RELEASE=-fallow-argument-mismatch

ref. https://gcc.gnu.org/gcc-10/changes.html

Mismatches between actual and dummy argument lists in a single file are now rejected with an error. Use the new option -fallow-argument-mismatch to turn these errors into warnings; this option is implied with -std=legacy. -Wargument-mismatch has been removed.

[Schlufi]

Also starting with version 10, GCC defaults to using -fno-common. This results in a large amount of multiple definition errors during linking. Adding -fcommon to the C flags should fix this.

[wistaria]

https://github.com/wistaria/MateriAppsInstaller/blob/master/apps/hphi/patch/hphi-3.4.0.patch solves the problem with GCC 10.

[wistaria]

The above patch works also for GCC 11.