The installation section on http://api.mongodb.org/c/current/installing.html#solaris claims we distribute Solaris 10 binary packages.
$ bash bash-3.2$ export ARCH=`uname -m` bash-3.2$ /usr/sfw/bin/wget --no-check-certificate "https://github.com/mongodb/mongo-c-driver/releases/download/1.1.10/MONGOmongo-c-driver-1.1.10.${ARCH}.pkg.tar.gz" bash-3.2$ gunzip -c "MONGOmongo-c-driver-1.1.10.${ARCH}.pkg.tar.gz" | tar -xf - bash-3.2$ pkgadd -d . MONGOmongo-c-driver
AFAICT there is only MONGOmongo-c-driver.1.1.4.sparc.pkg.tar.gz available for download.....