[ndnSIM] Using openssl with ndnSIM

[cghali at uci.edu]

Hi all,

I am trying to use openssl with ndnSIM. I spend the last several hours
trying to link the crypto library with waf and I finally managed to do it.
Apparently, adding the libray to LINKFLAGS_EXTRA did not help, although
-lcrypto is added to the g++ build command (which can be verified using
the verbose mode when running waf). The way how I fixed it is by adding
this line at the beginning of the build function in wscript

bld.env['LIB_PYEMBED'] = bld.env['LIB_PYEMBED'] + ["crypto"]

For some reason the crypto library should be linked at the end, that's why
I appended it to LIB_PYEMBED which is being evaluated at the end. Is there
a clean way to do this?

Thanks for the help,
Cesar