Current stable version 1.3.8-r1 fails to compile with openssl-1.1.0 version 1.3.9 works for me. https://svn.apache.org/repos/asf/serf/trunk/CHANGES Apache Serf 1.3.9 [2016-09-01, from tags/1.3.9, r1758195] Adapt to OpenSSL 1.1.x api (r1750819)
amd64 stable
sparc stable
ia64 stable
ppc64 stable
ppc stable
alpha stable
hppa stable
arm stable
x86 stable, closing