[Libstoragemgmt-devel] [PATCH] configure.ac: Handle -version-info for libtool

[Tony Asleson]

After figuring out how -version-info works I have added support
so that we will start versioning our shared object.

Signed-off-by: Tony Asleson <***@redhat.com>
---
c_binding/Makefile.am | 2 +-
configure.ac | 24 ++++++++++++++++++++++++
2 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/c_binding/Makefile.am b/c_binding/Makefile.am
index b401822..54a2d58 100644
--- a/c_binding/Makefile.am
+++ b/c_binding/Makefile.am
@@ -8,7 +8,7 @@ AM_CPPFLAGS = -I$(top_srcdir)/c_binding/include \
lib_LTLIBRARIES = libstoragemgmt.la

libstoragemgmt_la_LIBADD=$(LIBXML_LIBS) $(YAJL_LIBS) $(LIBGLIB_LIBS)
-libstoragemgmt_la_LDFLAGS=
+libstoragemgmt_la_LDFLAGS= -version-info $(LIBSM_LIBTOOL_VERSION)
libstoragemgmt_la_SOURCES= \
lsm_mgmt.cpp lsm_datatypes.hpp lsm_datatypes.cpp lsm_convert.hpp \
lsm_convert.cpp lsm_ipc.hpp lsm_ipc.cpp lsm_plugin_ipc.hpp \
diff --git a/configure.ac b/configure.ac
index 6e01ffc..66e1a4a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -23,12 +23,36 @@ LIBSM_VERSION=$LIBSM_MAJOR_VERSION.$LIBSM_MINOR_VERSION.$LIBSM_MICRO_VERSION$LIB
LIBSM_VERSION_INFO=`expr $LIBSM_MAJOR_VERSION + $LIBSM_MINOR_VERSION`:$LIBSM_MICRO_VERSION:$LIBSM_MINOR_VERSION
LIBSM_VERSION_NUMBER=`expr $LIBSM_MAJOR_VERSION \* 1000000 + $LIBSM_MINOR_VERSION \* 1000 + $LIBSM_MICRO_VERSION`

+# Our intention is that we will always be backward compatible. Thus we will
+# set the library version in such a way so that we will always be
+# libstoragemgmt.so.1.n.n once we officially release our ver 1.0.0.
+#
+# To make this happen we will use the minor version as the libtool current and
+# age set to minor - 1 and the micro used for revision. Basically this will get
+# us what we expect while utilizing the libtool revision system.
+#
+# For this to work we need to make sure that when we add to the interface we
+# increment minor and set micro to 0. If we make a code change which doesn't
+# change the API we can just bump micro.
+#
+# 0.1.0 -> libstoragemgmt.so.0.1.0
+# 1.0.0 -> libstoragemgmt.so.1.0.0
+# 1.1.0 -> libstoragemgmt.so.1.1.0
+# 1.1.1 -> libstoragemgmt.so.1.1.1
+
+CURRENT=`expr $LIBSM_MAJOR_VERSION '*' 1 + $LIBSM_MINOR_VERSION`
+AGE=$LIBSM_MINOR_VERSION
+REVISION=$LIBSM_MICRO_VERSION
+
+LIBSM_LIBTOOL_VERSION=$CURRENT:$REVISION:$AGE
+
AC_SUBST([LIBSM_MAJOR_VERSION])
AC_SUBST([LIBSM_MINOR_VERSION])
AC_SUBST([LIBSM_MICRO_VERSION])
AC_SUBST([LIBSM_VERSION])
AC_SUBST([LIBSM_VERSION_INFO])
AC_SUBST([LIBSM_VERSION_NUMBER])
+AC_SUBST([LIBSM_LIBTOOL_VERSION])

dnl Required minimum versions of all libs we depend on
LIBXML_REQUIRED="2.5.0"