[libxml2] Use CMake PROJECT_VERSION

[Nick Wellnhofer <nwellnhof src gnome org>]

commit 88c657d6439f0b3262099d408a3163af82e0e472
Author: Markus Rickert <rickert fortiss org>
Date:   Mon Feb 22 21:11:00 2021 +0100

    Use CMake PROJECT_VERSION

 CMakeLists.txt | 36 ++++++++++++++++++------------------
 1 file changed, 18 insertions(+), 18 deletions(-)
---
diff --git a/CMakeLists.txt b/CMakeLists.txt
index da0e5a91..d6ee9ec7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.15)
 
-project(libxml2 C)
+project(libxml2 VERSION 2.9.10 LANGUAGES C)
 
 include(CheckCSourceCompiles)
 include(CheckFunctionExists)
@@ -11,16 +11,6 @@ include(CheckSymbolExists)
 include(CMakePackageConfigHelpers)
 include(GNUInstallDirs)
 
-set(LIBXML_MAJOR_VERSION 2)
-set(LIBXML_MINOR_VERSION 9)
-set(LIBXML_MICRO_VERSION 10)
-
-set(VERSION "${LIBXML_MAJOR_VERSION}.${LIBXML_MINOR_VERSION}.${LIBXML_MICRO_VERSION}")
-set(LIBXML_VERSION ${LIBXML_MAJOR_VERSION}0${LIBXML_MINOR_VERSION}0${LIBXML_MICRO_VERSION})
-set(LIBXML_VERSION_STRING "${LIBXML_VERSION}")
-set(LIBXML_VERSION_EXTRA "")
-set(LIBXML_VERSION_NUMBER ${LIBXML_VERSION})
-
 option(BUILD_SHARED_LIBS "Build shared libraries" ON)
 set(LIBXML2_WITH_AUTOMATA ON)
 option(LIBXML2_WITH_C14N "Add the Canonicalization support" ON)
@@ -105,6 +95,16 @@ foreach(VARIABLE IN ITEMS WITH_AUTOMATA WITH_C14N WITH_CATALOG WITH_DEBUG WITH_D
        endif()
 endforeach()
 
+set(LIBXML_MAJOR_VERSION ${PROJECT_VERSION_MAJOR})
+set(LIBXML_MINOR_VERSION ${PROJECT_VERSION_MINOR})
+set(LIBXML_MICRO_VERSION ${PROJECT_VERSION_PATCH})
+
+set(VERSION "${LIBXML_MAJOR_VERSION}.${LIBXML_MINOR_VERSION}.${LIBXML_MICRO_VERSION}")
+set(LIBXML_VERSION ${LIBXML_MAJOR_VERSION}0${LIBXML_MINOR_VERSION}0${LIBXML_MICRO_VERSION})
+set(LIBXML_VERSION_STRING "${LIBXML_VERSION}")
+set(LIBXML_VERSION_EXTRA "")
+set(LIBXML_VERSION_NUMBER ${LIBXML_VERSION})
+
 set(MODULE_EXTENSION "${CMAKE_SHARED_LIBRARY_SUFFIX}")
 
 set(PACKAGE "libxml2")
@@ -493,7 +493,7 @@ set_target_properties(
        OUTPUT_NAME xml2
        POSITION_INDEPENDENT_CODE ON
        PREFIX lib
-       VERSION ${VERSION}
+       VERSION ${PROJECT_VERSION}
 )
 
 if(WIN32)
@@ -637,7 +637,7 @@ if(LIBXML2_WITH_PYTHON)
                IMPORT_PREFIX lib
                OUTPUT_NAME xml2mod
                PREFIX lib
-               VERSION ${VERSION}
+               VERSION ${PROJECT_VERSION}
        )
        install(
                TARGETS LibXml2Mod
@@ -659,30 +659,30 @@ install(DIRECTORY doc/ DESTINATION ${CMAKE_INSTALL_DATADIR}/doc/libxml2 COMPONEN
 
 configure_package_config_file(
        libxml2-config.cmake.cmake.in libxml2-config.cmake
-       INSTALL_DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/libxml2-${VERSION}
+       INSTALL_DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/libxml2-${PROJECT_VERSION}
 )
 
 install(
        FILES ${CMAKE_CURRENT_BINARY_DIR}/libxml2-config.cmake
-       DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/libxml2-${VERSION}
+       DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/libxml2-${PROJECT_VERSION}
        COMPONENT development
 )
 
 write_basic_package_version_file(
        ${CMAKE_CURRENT_BINARY_DIR}/libxml2-config-version.cmake
-       VERSION ${VERSION}
+       VERSION ${PROJECT_VERSION}
        COMPATIBILITY ExactVersion
 )
 
 install(
        FILES ${CMAKE_CURRENT_BINARY_DIR}/libxml2-config-version.cmake
-       DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/libxml2-${VERSION}
+       DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/libxml2-${PROJECT_VERSION}
        COMPONENT development
 )
 
 install(
        EXPORT LibXml2
-       DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/libxml2-${VERSION}
+       DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/libxml2-${PROJECT_VERSION}
        NAMESPACE LibXml2::
        FILE libxml2-export.cmake
        COMPONENT development