Loolwsd binary size

Hi

Why after building, loolwsd is about 21M while other loolwsd provided by kopano or collabora are about 2M?

For instance, this deb from kopano, built against core 5.4.5.1 / online 5.4.2 / poco 1.8 has 2M loolwsd:
https://download.kopano.io/community/libreofficeonline/Debian_8.0/amd64/

We have used the same versions with build-lool tool...

Thanks!
Nice tool ;)
