From e59908e7fc0000b1e7ebb4f546bc9490fab0612f Mon Sep 17 00:00:00 2001
From: "Roger A. Light" <roger@atchoo.org>
Date: Mon, 14 Dec 2015 17:25:29 +0000
Subject: [PATCH] Subject: [PATCH] Add LWS_LIBRARY_VERSION_NUMBER to
 lws_config.h.

This changeset adds a few preprocessor macros to lws_config.h to allow
a user of libwebsockets to determine at compile time which version of
lws they are compiling against.

This exposes the already existing LWS_LIBRARY_VERSION_MAJOR and _MINOR
values, and adds LWS_LIBRARY_VERSION_PATCH. This suggests that future
minor bugfix release versions of lws would be e.g. 1.6.0 -> 1.6.1 rather
than the style used previously: 1.2 -> 1.21.

The way this is currently set up means new minor revisions (with
_PATCH==0) always end with .0 but I could change this if preferred.

The most important addition is LWS_LIBRARY_VERSION_NUMBER, which
produces a number of the form 1005001 for version 1.5.1 - i.e. each part
major, minor, patch can extend from 0-999. This macro allows a very easy
compile time comparison of version numbers.
---
 CMakeLists.txt  | 9 +++++++--
 lws_config.h.in | 6 ++++++
 2 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8461fe3b..829b1a80 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,7 +10,8 @@ set(PACKAGE "libwebsockets")
 set(CPACK_PACKAGE_NAME "${PACKAGE}")
 set(CPACK_PACKAGE_VERSION_MAJOR "1")
 set(CPACK_PACKAGE_VERSION_MINOR "5")
-set(CPACK_PACKAGE_VERSION "${CPACK_PACKAGE_VERSION_MAJOR}.${CPACK_PACKAGE_VERSION_MINOR}")
+set(CPACK_PACKAGE_VERSION_PATCH "0")
+set(CPACK_PACKAGE_VERSION "${CPACK_PACKAGE_VERSION_MAJOR}.${CPACK_PACKAGE_VERSION_MINOR}.${CPACK_PACKAGE_VERSION_PATCH}")
 set(CPACK_PACKAGE_VENDOR "andy@warmcat.com")
 set(CPACK_PACKAGE_DESCRIPTION_SUMMARY "${PACKAGE} ${PACKAGE_VERSION}")
 set(SOVERSION "6")
@@ -19,6 +20,10 @@ set(CPACK_SOURCE_PACKAGE_FILE_NAME "${CPACK_PACKAGE_NAME}-${CPACK_PACKAGE_VERSIO
 set(VERSION "${CPACK_PACKAGE_VERSION}")
 
 set(LWS_LIBRARY_VERSION ${CPACK_PACKAGE_VERSION})
+set(LWS_LIBRARY_VERSION_MAJOR ${CPACK_PACKAGE_VERSION_MAJOR})
+set(LWS_LIBRARY_VERSION_MINOR ${CPACK_PACKAGE_VERSION_MINOR})
+set(LWS_LIBRARY_VERSION_PATCH ${CPACK_PACKAGE_VERSION_PATCH})
+
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${PROJECT_SOURCE_DIR}/cmake/")
 
 message(STATUS "CMAKE_TOOLCHAIN_FILE='${CMAKE_TOOLCHAIN_FILE}'")
@@ -957,7 +962,7 @@ includedir=\${prefix}/include
 
 Name: libwebsockets
 Description: Websockets server and client library
-Version: ${CPACK_PACKAGE_VERSION_MAJOR}.${CPACK_PACKAGE_VERSION_MINOR}
+Version: ${CPACK_PACKAGE_VERSION_MAJOR}.${CPACK_PACKAGE_VERSION_MINOR}.${CPACK_PACKAGE_VERSION_PATCH}
 
 Libs: -L\${libdir} -lwebsockets
 Cflags: -I\${includedir}"
diff --git a/lws_config.h.in b/lws_config.h.in
index 13622fbc..df2e0434 100644
--- a/lws_config.h.in
+++ b/lws_config.h.in
@@ -17,6 +17,12 @@
 /* The Libwebsocket version */
 #cmakedefine LWS_LIBRARY_VERSION "${LWS_LIBRARY_VERSION}"
 
+#define LWS_LIBRARY_VERSION_MAJOR ${LWS_LIBRARY_VERSION_MAJOR}
+#define LWS_LIBRARY_VERSION_MINOR ${LWS_LIBRARY_VERSION_MINOR}
+#define LWS_LIBRARY_VERSION_PATCH ${LWS_LIBRARY_VERSION_PATCH}
+/* LWS_LIBRARY_VERSION_NUMBER looks like 1005001 for e.g. version 1.5.1 */
+#define LWS_LIBRARY_VERSION_NUMBER (LWS_LIBRARY_MAJOR*1000000)+(LWS_LIBRARY_VERSION_MINOR*1000)+LWS_LIBRARY_VERSION_PATCH
+
 /* The current git commit hash that we're building from */
 #cmakedefine LWS_BUILD_HASH "${LWS_BUILD_HASH}"