add version number to alpaka3

CMakeLists.txt

@@ -5,7 +5,39 @@
 #
 
 cmake_minimum_required(VERSION 3.25)
-project(alpaka)
+
+# Find alpaka version.
+file(
+    STRINGS
+    "${CMAKE_CURRENT_LIST_DIR}/include/alpaka/version.hpp"
+    alpaka_VERSION_MAJOR_HPP
+    REGEX "#define ALPAKA_VERSION_MAJOR "
+)
+file(
+    STRINGS
+    "${CMAKE_CURRENT_LIST_DIR}/include/alpaka/version.hpp"
+    alpaka_VERSION_MINOR_HPP
+    REGEX "#define ALPAKA_VERSION_MINOR "
+)
+file(
+    STRINGS
+    "${CMAKE_CURRENT_LIST_DIR}/include/alpaka/version.hpp"
+    alpaka_VERSION_PATCH_HPP
+    REGEX "#define ALPAKA_VERSION_PATCH "
+)
+
+string(REGEX MATCH "([0-9]+)" alpaka_VERSION_MAJOR ${alpaka_VERSION_MAJOR_HPP})
+string(REGEX MATCH "([0-9]+)" alpaka_VERSION_MINOR ${alpaka_VERSION_MINOR_HPP})
+string(REGEX MATCH "([0-9]+)" alpaka_VERSION_PATCH ${alpaka_VERSION_PATCH_HPP})
+
+set(PACKAGE_VERSION "${alpaka_VERSION_MAJOR}.${alpaka_VERSION_MINOR}.${alpaka_VERSION_PATCH}")
+
+project(
+    alpaka
+    VERSION ${alpaka_VERSION_MAJOR}.${alpaka_VERSION_MINOR}.${alpaka_VERSION_PATCH}
+    DESCRIPTION "The alpaka library is a header-only C++20 abstraction library for accelerator development."
+    HOMEPAGE_URL "https://github.com/alpaka-group/alpaka3"
+)
 
 # This file's directory.
 set(_alpaka_ROOT_DIR ${CMAKE_CURRENT_LIST_DIR})

cmake/alpakaCommon.cmake

@@ -114,6 +114,11 @@ if(NOT TARGET alpaka)
     target_compile_definitions(alpaka_target_headers INTERFACE ALPAKA_CMAKE_TARGET_HEADERS)
 
     add_library(alpaka INTERFACE)
+    set_target_properties(alpaka PROPERTIES VERSION ${PROJECT_VERSION})
+
+    get_target_property(version alpaka VERSION)
+    message(STATUS "Alpaka version: ${version}")
+
     add_library(alpaka::alpaka ALIAS alpaka)
     target_compile_definitions(alpaka INTERFACE ALPAKA_CMAKE_TARGET_ALPAKA)
 

include/alpaka/core/config.hpp

@@ -7,6 +7,7 @@
 
 #include "alpaka/core/PP.hpp"
 #include "alpaka/core/hipConfig.hpp"
+#include "alpaka/version.hpp"
 
 // guard cmake target alpaka
 #if defined(ALPAKA_CMAKE_TARGET_ALPAKA) && !defined(ALPAKA_CMAKE_TARGET_ALPAKA_FINALIZE_CALLED)

include/alpaka/version.hpp

@@ -0,0 +1,14 @@
+/* Copyright 2025 Benjamin Worpitz, Erik Zenker, Jan Stephan, René Widera
+ * SPDX-License-Identifier: MPL-2.0
+ */
+
+#pragma once
+
+#include "core/PP.hpp"
+
+#define ALPAKA_VERSION_MAJOR 3
+#define ALPAKA_VERSION_MINOR 0
+#define ALPAKA_VERSION_PATCH 0
+
+//! The alpaka library version number
+#define ALPAKA_VERSION ALPAKA_VERSION_NUMBER(ALPAKA_VERSION_MAJOR, ALPAKA_VERSION_MINOR, ALPAKA_VERSION_PATCH)