Added the extern c fix to comp_shm
Added the extern c fix to comp_shm

CentralLabFacilities/m3meka,ahoarau/m3meka,CentralLabFacilities/m3meka,CentralLabFacilities/m3meka,ahoarau/m3meka,ahoarau/m3meka,ahoarau/m3meka,ahoarau/m3meka,CentralLabFacilities/m3meka,CentralLabFacilities/m3meka