Improve the help message

Signed-off-by: Pauli Nieminen <suokkos@gmail.com>
Allow very random seed and fix printing of that seed

/dev/urandom provides secure random numbers from the kernel. Too bad
printing code and seed parameter reading prevented used from setting
same seed again because of signedness mismatch.

Signed-off-by: Pauli Nieminen <suokkos@gmail.com>
Add comments to the code

Signed-off-by: Pauli Nieminen <suokkos@gmail.com>
Handle some common EINTR cases

Signed-off-by: Pauli Nieminen <suokkos@gmail.com>
Add DESTDIR support to install and uninstall targets

Signed-off-by: Pauli Nieminen <suokkos@gmail.com>
Add comments to the makefile

Signed-off-by: Pauli Nieminen <suokkos@gmail.com>
Detect or supported cxx sources

Signed-off-by: Pauli Nieminen <suokkos@gmail.com>