From d192c5bd32736fde0080d756de6221287af34891 Mon Sep 17 00:00:00 2001
From: Daniel Drake <dan@reactivated.net>
Date: Mon, 4 Oct 2010 18:45:18 +0100
Subject: [PATCH] Update libtool version info

With input from various people on the mailing list, update the libtool
versioning info and start to update this on every release.

The next libusb release will not need a change here. All following ones
will.
---
 configure.ac       | 19 +++++++++++--------
 libusb/Makefile.am |  1 +
 2 files changed, 12 insertions(+), 8 deletions(-)

diff --git a/configure.ac b/configure.ac
index 84c361d..38e9ce7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2,11 +2,22 @@ m4_define(LIBUSB_MAJOR, [1])
 m4_define(LIBUSB_MINOR, [0])
 m4_define(LIBUSB_MICRO, [8])
 
+# Library versioning
+# These numbers should be tweaked on every release. Read carefully:
+# http://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
+# http://sourceware.org/autobook/autobook/autobook_91.html
+lt_current="1"
+lt_revision="0"
+lt_age="1"
+
 AC_INIT([libusb], LIBUSB_MAJOR.LIBUSB_MINOR.LIBUSB_MICRO, [libusb-devel@lists.sourceforge.net], [libusb], [http://www.libusb.org/])
 
 AC_SUBST([LIBUSB_VERSION_MAJOR], [LIBUSB_MAJOR])
 AC_SUBST([LIBUSB_VERSION_MINOR], [LIBUSB_MINOR])
 AC_SUBST([LIBUSB_VERSION_MICRO], [LIBUSB_MICRO])
+AC_SUBST(lt_current)
+AC_SUBST(lt_revision)
+AC_SUBST(lt_age)
 
 AM_INIT_AUTOMAKE
 AC_CONFIG_SRCDIR([libusb/core.c])
@@ -78,14 +89,6 @@ AM_CONDITIONAL([OS_DARWIN], [test "x$backend" = "xdarwin"])
 AM_CONDITIONAL([OS_WINDOWS], [test "x$backend" = "xwindows"])
 AM_CONDITIONAL([THREADS_POSIX], [test "x$threads" = "xposix"])
 
-# Library versioning
-lt_major="0"
-lt_revision="0"
-lt_age="0"
-AC_SUBST(lt_major)
-AC_SUBST(lt_revision)
-AC_SUBST(lt_age)
-
 # timerfd
 AC_CHECK_HEADER([sys/timerfd.h], [timerfd_h=1], [timerfd_h=0])
 AC_ARG_ENABLE([timerfd],
diff --git a/libusb/Makefile.am b/libusb/Makefile.am
index 879a3f7..25c36bb 100644
--- a/libusb/Makefile.am
+++ b/libusb/Makefile.am
@@ -28,6 +28,7 @@ endif
 endif
 
 libusb_1_0_la_CFLAGS = $(VISIBILITY_CFLAGS) $(AM_CFLAGS) $(THREAD_CFLAGS)
+libusb_1_0_la_LDFLAGS = -version-info $(lt_current):$(lt_revision):$(lt_age)
 libusb_1_0_la_SOURCES = libusbi.h core.c descriptor.c io.c sync.c $(OS_SRC) \
 	os/linux_usbfs.h os/darwin_usb.h os/windows_usb.h \
 	os/threads_posix.h os/threads_windows.h \
-- 
2.7.4