build: add a comment about libtool version to configure.ac

The libtool version only applies to the core C library, not to tools
or python bindings. C++ bindings have a separate libtool version.

Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>

diff --git a/configure.ac b/configure.ac
index 7bd8c888c4cc61cf7d543de2c54e96bb79ebf671..445bd0cfdf9db18c4617c9a851ce33400f31ccde 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -29,6 +29,7 @@ AC_SUBST(VERSION_STR, [$PACKAGE_VERSION$EXTRA_VERSION])
 #    release, then set age to 0.
 #
 # Define the libtool version as (C.R.A):
+# NOTE: this version only applies to the core C library.
 AC_SUBST(ABI_VERSION, [2.0.0])
 # Have a separate ABI version for C++ bindings:
 AC_SUBST(ABI_CXX_VERSION, [1.0.0])