diff -Naur libobjc2-1.7.orig/CMakeLists.txt libobjc2-1.7/CMakeLists.txt
--- libobjc2-1.7.orig/CMakeLists.txt	2013-06-27 13:30:41.000000000 +0200
+++ libobjc2-1.7/CMakeLists.txt	2015-05-20 13:20:55.214244088 +0200
@@ -8,7 +8,8 @@
 set(CMAKE_C_FLAGS_RELEASE "-O3 ${CMAKE_C_FLAGS_RELEASE}")
 set(CMAKE_C_FLAGS "-std=gnu99 ${CMAKE_C_FLAGS}")
 
-set(libobjc_VERSION 4.6)
+set(libobjc_SOVERSION 4)
+set(libobjc_VERSION 4.6.0)
 
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fexceptions")
 # Build configuration
@@ -204,7 +205,8 @@
 			add_library(objcxx SHARED ${libobjcxx_CXX_SRCS})
 			set_target_properties(objcxx PROPERTIES
 				LINKER_LANGUAGE C
-				SOVERSION ${libobjc_VERSION}
+            SOVERSION ${libobjc_SOVERSION}
+            VERSION ${libobjc_VERSION}
 				)
 			target_link_libraries(objcxx ${CXX_RUNTIME})
 			set(CXX_RUNTIME "")
@@ -220,7 +222,8 @@
 		add_library(objcxx SHARED ${libobjcxx_CXX_SRCS})
 		set_target_properties(objcxx PROPERTIES
 			LINKER_LANGUAGE C
-			SOVERSION ${libobjc_VERSION}
+         SOVERSION ${libobjc_SOVERSION}
+         VERSION ${libobjc_VERSION}
 			)
 		set(CXX_RUNTIME "")
 		list(APPEND INSTALL_TARGETS objcxx)
@@ -241,7 +244,8 @@
 
 set_target_properties(objc PROPERTIES
 	LINKER_LANGUAGE C
-	SOVERSION ${libobjc_VERSION}
+   SOVERSION ${libobjc_SOVERSION}
+   VERSION ${libobjc_VERSION}
 	OUTPUT_NAME ${LIBOBJC_NAME}
 	LINK_FLAGS "${objc_LINK_FLAGS}"
 	)
@@ -349,3 +353,14 @@
 	add_subdirectory(Test)
 endif (TESTS)
 
+
+MESSAGE(STATUS "<<< Gentoo configuration >>>
+Build type      ${CMAKE_BUILD_TYPE}
+Install path    ${CMAKE_INSTALL_PREFIX}
+Compiler flags:
+C               ${CMAKE_C_FLAGS}
+C++             ${CMAKE_CXX_FLAGS}
+Linker flags:
+Executable      ${CMAKE_EXE_LINKER_FLAGS}
+Module          ${CMAKE_MODULE_LINKER_FLAGS}
+Shared          ${CMAKE_SHARED_LINKER_FLAGS}\n")