I can confirm that this problem persists in 7.10. It looks like something went wrong with the configure process at build time: strace reveals that mpicc and friends attempt to read "${prefix}/share/openmpi/mpicc-wrapper-data.txt". The work-around I've used is to open up these wrapper programs with a hex editor and edit the offending string in place, replacing it with "/usr/share/openmpi/mpicc-wrapper-data.txt\0\0\0\0\0" in the mpicc case for example.
I can confirm that this problem persists in 7.10. It looks like something went wrong with the configure process at build time: strace reveals that mpicc and friends attempt to read "${prefix} /share/ openmpi/ mpicc-wrapper- data.txt" . The work-around I've used is to open up these wrapper programs with a hex editor and edit the offending string in place, replacing it with "/usr/share/ openmpi/ mpicc-wrapper- data.txt\ 0\0\0\0\ 0" in the mpicc case for example.