ENH: fix install test with xcode, the xcode generator does not support library versioning yet

Modules/Platform/Darwin.cmake

@@ -12,9 +12,11 @@ IF("${CMAKE_BACKWARDS_COMPATIBILITY}" MATCHES "^1\\.[0-6]$")
     "${CMAKE_SHARED_MODULE_CREATE_C_FLAGS} -flat_namespace -undefined suppress")
 ENDIF("${CMAKE_BACKWARDS_COMPATIBILITY}" MATCHES "^1\\.[0-6]$")
 
-# Enable shared library versioning.
-SET(CMAKE_SHARED_LIBRARY_SONAME_C_FLAG "-install_name")
-SET(CMAKE_SHARED_LIBRARY_SONAME_CXX_FLAG "-install_name")
+IF(NOT XCODE)
+# Enable shar   ed library versioning.
+  SET(CMAKE_SHARED_LIBRARY_SONAME_C_FLAG "-install_name")
+  SET(CMAKE_SHARED_LIBRARY_SONAME_CXX_FLAG "-install_name")
+ENDIF(NOT XCODE)
 
 # OSX does not really implement an rpath, but it does allow a path to
 # be specified in the soname field of a dylib.

Source/cmGlobalXCodeGenerator.cxx

@@ -42,6 +42,7 @@ void cmGlobalXCodeGenerator::EnableLanguage(std::vector<std::string>const&
                                             lang,
                                             cmMakefile * mf)
 { 
+  mf->AddDefinition("XCODE","1");
   mf->AddDefinition("CMAKE_CFG_INTDIR",".");
   mf->AddDefinition("CMAKE_GENERATOR_CC", "gcc");
   mf->AddDefinition("CMAKE_GENERATOR_CXX", "g++");