The last release (libsigrok 0.1.1) had a lib version of 0:0:0.
This release thus gets 1:0:0 according to the libtool manual guidelines.
# Carefully read the libtool docs before updating these numbers!
# The algorithm for determining which number to change (and how) is nontrivial!
# http://www.gnu.org/software/libtool/manual/libtool.html#Updating-version-info
-SR_LIB_VERSION_CURRENT=2
+SR_LIB_VERSION_CURRENT=1
SR_LIB_VERSION_REVISION=0
SR_LIB_VERSION_AGE=0
SR_LIB_VERSION="$SR_LIB_VERSION_CURRENT:$SR_LIB_VERSION_REVISION:$SR_LIB_VERSION_AGE"