I have some Fortran code I would like to paralelize with MPI. Appereantly, recomended way to use MPI (MPICH, in my case) with Fortran is through `mpi_f08` module ([mpi-forum entry on the matter](https://www.mpi-forum.org/docs/mpi-3.1/mpi31-report/node408.htm)), but I have trouble making it work, since corresponding mod file is simply not created (unlike `mpi.mod`, which works fine, but it's not up to date with Fortran standart). [This discussion](https://lists.mpich.org/pipermail/discuss/2018-March/002203.html) left me under the impression it's because gfortran can't build the F08 bindings. Below you can see my configuration, both gfortran and mpich have been installed throught apt install on ubuntu and should be up to date. I'm unsure about a few things :

* Is there any way to make the Fortran 2008 MPI syntax work with gfortran? From what I came across, it seems the answer is no, but hopefully someone may know a fix. I'm not too versed in this, so any relavant links or more entry level explanation would be greatly appreciated.
* Could using different compiler help? Intel compiler\* maybe? I would rather stick with gfortran if reasonable.
* Maybe consistency with current standart isn't such a big deal. From your experience, would it be better to just go with support through mpi.mod module? What problems could I expect then? My application doesn't have much long term ambition, so falling out of support some time later isn't a big problem if it works properly now.

Edit
====

It seem's to have been problem of using outdated version of gfortran. This reduces my question to how to build MPICH with gfortran-10.

---

\* hence the [intel-fortran] tag, feel free to remove it if you think it redundant
Just for clarity, there's my gfortran and mpich configuration

```
pavel@pavel:~$ gfortran -v
Using built-in specs.
COLLECT_GCC=gfortran
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/7/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 7.5.0-3ubuntu1~18.04' --with-bugurl=file:///usr/share/doc/gcc-7/README.Bugs --enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr --with-gcc-major-version-only --program-suffix=-7 --program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --enable-bootstrap --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie --with-system-zlib --with-target-system-zlib --enable-objc-gc=auto --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-offload-targets=nvptx-none --without-cuda-driver --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 7.5.0 (Ubuntu 7.5.0-3ubuntu1~18.04) 

```

```
pavel@pavel:~$ mpiexec --version
HYDRA build details:
    Version:                                 3.3a2
    Release Date:                            Sun Nov 13 09:12:11 MST 2016
    CC:                              gcc   -Wl,-Bsymbolic-functions -Wl,-z,relro 
    CXX:                             g++   -Wl,-Bsymbolic-functions -Wl,-z,relro 
    F77:                             gfortran  -Wl,-Bsymbolic-functions -Wl,-z,relro 
    F90:                             gfortran  -Wl,-Bsymbolic-functions -Wl,-z,relro 
    Configure options:                       '--disable-option-checking' '--prefix=/usr' '--build=x86_64-linux-gnu' '--includedir=${prefix}/include' '--mandir=${prefix}/share/man' '--infodir=${prefix}/share/info' '--sysconfdir=/etc' '--localstatedir=/var' '--disable-silent-rules' '--libdir=${prefix}/lib/x86_64-linux-gnu' '--libexecdir=${prefix}/lib/x86_64-linux-gnu' '--disable-maintainer-mode' '--disable-dependency-tracking' '--with-libfabric' '--enable-shared' '--enable-fortran=all' '--disable-rpath' '--disable-wrapper-rpath' '--sysconfdir=/etc/mpich' '--libdir=/usr/lib/x86_64-linux-gnu' '--includedir=/usr/include/mpich' '--docdir=/usr/share/doc/mpich' '--with-hwloc-prefix=system' '--enable-checkpointing' '--with-hydra-ckpointlib=blcr' 'CPPFLAGS= -Wdate-time -D_FORTIFY_SOURCE=2 -I/build/mpich-O9at2o/mpich-3.3~a2/src/mpl/include -I/build/mpich-O9at2o/mpich-3.3~a2/src/mpl/include -I/build/mpich-O9at2o/mpich-3.3~a2/src/openpa/src -I/build/mpich-O9at2o/mpich-3.3~a2/src/openpa/src -D_REENTRANT -I/build/mpich-O9at2o/mpich-3.3~a2/src/mpi/romio/include' 'CFLAGS= -g -O2 -fdebug-prefix-map=/build/mpich-O9at2o/mpich-3.3~a2=. -fstack-protector-strong -Wformat -Werror=format-security -O2' 'CXXFLAGS= -g -O2 -fdebug-prefix-map=/build/mpich-O9at2o/mpich-3.3~a2=. -fstack-protector-strong -Wformat -Werror=format-security -O2' 'FFLAGS= -g -O2 -fdebug-prefix-map=/build/mpich-O9at2o/mpich-3.3~a2=. -fstack-protector-strong -O2' 'FCFLAGS= -g -O2 -fdebug-prefix-map=/build/mpich-O9at2o/mpich-3.3~a2=. -fstack-protector-strong -O2' 'build_alias=x86_64-linux-gnu' 'MPICHLIB_CFLAGS=-g -O2 -fdebug-prefix-map=/build/mpich-O9at2o/mpich-3.3~a2=. -fstack-protector-strong -Wformat -Werror=format-security' 'MPICHLIB_CPPFLAGS=-Wdate-time -D_FORTIFY_SOURCE=2' 'MPICHLIB_CXXFLAGS=-g -O2 -fdebug-prefix-map=/build/mpich-O9at2o/mpich-3.3~a2=. -fstack-protector-strong -Wformat -Werror=format-security' 'MPICHLIB_FFLAGS=-g -O2 -fdebug-prefix-map=/build/mpich-O9at2o/mpich-3.3~a2=. -fstack-protector-strong' 'MPICHLIB_FCFLAGS=-g -O2 -fdebug-prefix-map=/build/mpich-O9at2o/mpich-3.3~a2=. -fstack-protector-strong' 'LDFLAGS=-Wl,-Bsymbolic-functions -Wl,-z,relro' 'FC=gfortran' 'F77=gfortran' 'MPILIBNAME=mpich' '--cache-file=/dev/null' '--srcdir=.' 'CC=gcc' 'LIBS=' 'MPLLIBNAME=mpl'
    Process Manager:                         pmi
    Launchers available:                     ssh rsh fork slurm ll lsf sge manual persist
    Topology libraries available:            hwloc
    Resource management kernels available:   user slurm ll lsf sge pbs cobalt
    Checkpointing libraries available:       blcr
    Demux engines available:                 poll select

```

trying to compile my code with `mpif90` leads to

```
something.f90:2:5:

  use mpi_f08
     1
Fatal Error: Can't open module file ‘mpi_f08.mod’ for reading at (1): File does not exist
compilation terminated.

```