+# This flag accepts an argument of the form current[:revision[:age]]. So,
+# passing -version-info 3:12:1 sets current to 3, revision to 12, and age to 1.
+#
+# If either revision or age are omitted, they default to 0. Also note that
+# age must be less than or equal to the current interface number.
+#
+# Here are a set of rules to help you update your library version information:
+#
+# 1. Start with version information of 0:0:0 for each libtool library.
+#
+# 2. Update the version information only immediately before a public
+# release of your software. More frequent updates are unnecessary, and
+# only guarantee that the current interface number gets larger faster.
+#
+# 3. If the library source code has changed at all since the last update,
+# then increment revision (c:r:a becomes c:r+1:a).
+#
+# 4. If any interfaces have been added, removed, or changed since the last
+# update, increment current, and set revision to 0.
+#
+# 5. If any interfaces have been added since the last public release, then
+# increment age.
+#
+# 6. If any interfaces have been removed since the last public release,
+# then set age to 0.
+#
+# Never try to set the interface numbers so that they correspond to the
+# release number of your package. This is an abuse that only fosters
+# misunderstanding of the purpose of library versions. Instead, use the
+# -release flag (see Release numbers), but be warned that every release of
+# your package will not be binary compatible with any other release.
+#
+# see http://www.gnu.org/software/libtool/manual.html#SEC32 for explanation
+librrd_la_LDFLAGS = -version-info 2:7:0
+
+librrd_th_la_SOURCES = $(RRD_C_FILES) rrd_thread_safe.c
+librrd_th_la_CFLAGS = $(MULTITHREAD_CFLAGS)
+librrd_th_la_LDFLAGS = $(MULTITHREAD_LDFLAGS) -version-info 2:7:0