From ea6eed10c7579f5ce20169a61580d329252ba935 Mon Sep 17 00:00:00 2001
From: Peter Wu <peter@lekensteyn.nl>
Date: Thu, 11 Feb 2016 23:06:35 +0100
Subject: [PATCH] cmake: fix version in soname

---
 CMakeLists.txt     | 2 ++
 lib/CMakeLists.txt | 3 +--
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 184dd2cb..7f4c20a6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -35,6 +35,8 @@ set(LT_AGE      4)
 set(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake")
 include(Version)
 
+math(EXPR LT_SOVERSION "${LT_CURRENT} - ${LT_AGE}")
+set(LT_VERSION "${LT_SOVERSION}.${LT_AGE}.${LT_REVISION}")
 set(PACKAGE_VERSION     "${PROJECT_VERSION}")
 HexVersion(PACKAGE_VERSION_NUM ${PROJECT_VERSION_MAJOR} ${PROJECT_VERSION_MINOR} ${PROJECT_VERSION_PATCH})
 
diff --git a/lib/CMakeLists.txt b/lib/CMakeLists.txt
index 7b4d5e3e..d2dc019c 100644
--- a/lib/CMakeLists.txt
+++ b/lib/CMakeLists.txt
@@ -27,8 +27,7 @@ add_library(nghttp2 SHARED ${NGHTTP2_SOURCES})
 #target_link_libraries(nghttp2 ...)
 set_target_properties(nghttp2 PROPERTIES
   COMPILE_FLAGS "${WARNCFLAGS} ${EXTRACFLAG}"
-  VERSION ${LT_CURRENT}.${LT_REVISION}.${LT_AGE}
-  SOVERSION ${LT_CURRENT})
+  VERSION ${LT_VERSION} SOVERSION ${LT_SOVERSION})
 
 install(TARGETS nghttp2
   LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}")