[CMake] add version and soversion to base libraries

cmake/GetVersion.cmake

@@ -9,4 +9,6 @@ macro(get_mapnik_version)
 
     string(REGEX MATCH "MAPNIK_PATCH_VERSION ([0-9]*)" _ ${VERSION_FILE})
     set(MAPNIK_PATCH_VERSION ${CMAKE_MATCH_1})
+
+    set(MAPNIK_VERSION ${MAPNIK_MAJOR_VERSION}.${MAPNIK_MINOR_VERSION}.${MAPNIK_PATCH_VERSION})
 endmacro()

cmake/MapnikExport.cmake

@@ -3,8 +3,8 @@ include(CMakePackageConfigHelpers)
 # export mapnik configuration
 write_basic_package_version_file(
     "${CMAKE_CURRENT_BINARY_DIR}/mapnikConfigVersion.cmake"
-    VERSION ${PROJECT_VERSION}
-    COMPATIBILITY SameMajorVersion
+    VERSION ${MAPNIK_VERSION}
+    COMPATIBILITY ExactVersion
 )
 get_property(MAPNIK_UTILITIES GLOBAL PROPERTY MAPNIK_UTILITIES)
 list(JOIN MAPNIK_DEPENDENCIES "\n" MAPNIK_DEPENDENCIES)

src/CMakeLists.txt

@@ -293,6 +293,9 @@ set_target_properties(mapnik PROPERTIES
     DEBUG_POSTFIX "${MAPNIK_DEBUG_POSTFIX}"
     OUTPUT_NAME "mapnik"
     PREFIX "lib"
+    VERSION ${MAPNIK_VERSION}
+    # see https://github.com/mapnik/mapnik/pull/4248#issuecomment-925596509 => ABI compability only with the full version
+    SOVERSION ${MAPNIK_VERSION}
 )
 
 if(MSVC)

src/json/CMakeLists.txt

@@ -29,6 +29,9 @@ set_target_properties(json PROPERTIES
     DEBUG_POSTFIX "${MAPNIK_DEBUG_POSTFIX}"
     OUTPUT_NAME "json"
     PREFIX "libmapnik-"
+    VERSION ${MAPNIK_VERSION} 
+    # see mapnik target for explanation
+    SOVERSION ${MAPNIK_VERSION}
 )
 
 mapnik_install(json)

src/wkt/CMakeLists.txt

@@ -21,6 +21,9 @@ set_target_properties(wkt PROPERTIES
     DEBUG_POSTFIX "${MAPNIK_DEBUG_POSTFIX}"
     OUTPUT_NAME "wkt"
     PREFIX "libmapnik-"
+    VERSION ${MAPNIK_VERSION} 
+    # see mapnik target for explanation
+    SOVERSION ${MAPNIK_VERSION}
 )
 
 mapnik_install(wkt)