Added build option SONAME to control whether VERSION and SOVERSION were set for…

 Added build option SONAME to control whether VERSION and SOVERSION were set for the git2 target, as some platforms require that this NOT be set.

CMakeLists.txt

@@ -16,6 +16,7 @@ CMAKE_MINIMUM_REQUIRED(VERSION 2.6)
 
 # Build options
 #
+OPTION( SONAME				"Set the (SO)VERSION of the target"		ON  )
 OPTION( BUILD_SHARED_LIBS	"Build Shared Library (OFF for Static)"	ON  )
 OPTION( THREADSAFE			"Build libgit2 as threadsafe"			OFF )
 OPTION( BUILD_CLAR			"Build Tests using the Clar suite"		ON  )
@@ -258,8 +259,10 @@ TARGET_OS_LIBRARIES(git2)
 
 MSVC_SPLIT_SOURCES(git2)
 
-SET_TARGET_PROPERTIES(git2 PROPERTIES VERSION ${LIBGIT2_VERSION_STRING})
-SET_TARGET_PROPERTIES(git2 PROPERTIES SOVERSION ${LIBGIT2_VERSION_MAJOR})
+IF (SONAME)
+	SET_TARGET_PROPERTIES(git2 PROPERTIES VERSION ${LIBGIT2_VERSION_STRING})
+	SET_TARGET_PROPERTIES(git2 PROPERTIES SOVERSION ${LIBGIT2_VERSION_MAJOR})
+ENDIF()
 CONFIGURE_FILE(${CMAKE_CURRENT_SOURCE_DIR}/libgit2.pc.in ${CMAKE_CURRENT_BINARY_DIR}/libgit2.pc @ONLY)
 
 IF (MSVC_IDE)