I have a Linux/x86-64 system with PathScale's "ekopath-4.0.12.1" compilers.
Building Fortran 2008 support fails as shown below.
My records show the ompi-1.5 branch and a Feb 2012 trunk were OK on this configuration.
PPFC mpi-f08-interfaces-callbacks.lo
module mpi_f08_interfaces_callbacks
^
pathf95-855 pathf95: ERROR MPI_F08_INTERFACES_CALLBACKS, File = /global/homes/h/hargrove/GSCRATCH/OMPI/openmpi-1.7rc5-linux-x86_64-pathcc-4.0/openmpi-1.7rc5/ompi/mpi/fortran/base/mpi-f08-interfaces-callbacks.F90, Line = 9, Column = 8
The compiler has detected errors in module "MPI_F08_INTERFACES_CALLBACKS". No module information file will be created for this module.
attribute_val_in,attribute_val_out,flag,ierror) &
^
pathf95-1691 pathf95: ERROR MPI_COMM_COPY_ATTR_FUNCTION, File = /global/homes/h/hargrove/GSCRATCH/OMPI/openmpi-1.7rc5-linux-x86_64-pathcc-4.0/openmpi-1.7rc5/ompi/mpi/fortran/base/mpi-f08-interfaces-callbacks.F90, Line = 66, Column = 75
For "FLAG", LOGICAL(KIND=4) not allowed with BIND(C)
attribute_val_in,attribute_val_out,flag,ierror) &
^
pathf95-1691 pathf95: ERROR MPI_WIN_COPY_ATTR_FUNCTION, File = /global/homes/h/hargrove/GSCRATCH/OMPI/openmpi-1.7rc5-linux-x86_64-pathcc-4.0/openmpi-1.7rc5/ompi/mpi/fortran/base/mpi-f08-interfaces-callbacks.F90, Line = 91, Column = 74
For "FLAG", LOGICAL(KIND=4) not allowed with BIND(C)
attribute_val_in,attribute_val_out,flag,ierror) &
^
pathf95-1691 pathf95: ERROR MPI_TYPE_COPY_ATTR_FUNCTION, File = /global/homes/h/hargrove/GSCRATCH/OMPI/openmpi-1.7rc5-linux-x86_64-pathcc-4.0/openmpi-1.7rc5/ompi/mpi/fortran/base/mpi-f08-interfaces-callbacks.F90, Line = 116, Column = 75
For "FLAG", LOGICAL(KIND=4) not allowed with BIND(C)
SUBROUTINE MPI_Grequest_cancel_function(extra_state,complete,ierror) &
^
pathf95-1691 pathf95: ERROR MPI_GREQUEST_CANCEL_FUNCTION, File = /global/homes/h/hargrove/GSCRATCH/OMPI/openmpi-1.7rc5-linux-x86_64-pathcc-4.0/openmpi-1.7rc5/ompi/mpi/fortran/base/mpi-f08-interfaces-callbacks.F90, Line = 195, Column = 53
For "COMPLETE", LOGICAL(KIND=4) not allowed with BIND(C)
pathf95: PathScale(TM) Fortran Version 4.0.12.1 (f14) Tue Oct 30, 2012 20:45:48
pathf95: 429 source lines
pathf95: 5 Error(s), 0 Warning(s), 0 Other message(s), 0 ANSI(s)
pathf95: "explain pathf95-message number" gives more information about each message
make[2]: *** [mpi-f08-interfaces-callbacks.lo] Error 1
make[2]: Leaving directory `/global/scratch/sd/hargrove/OMPI/openmpi-1.7rc5-linux-x86_64-pathcc-4.0/BLD/ompi/mpi/fortran/base'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/global/scratch/sd/hargrove/OMPI/openmpi-1.7rc5-linux-x86_64-pathcc-4.0/BLD/ompi'
make: *** [all-recursive] Error 1