diff -up sigil-0.4.2/src/Xerces/CMakeLists.txt.flags sigil-0.4.2/src/Xerces/CMakeLists.txt
--- sigil-0.4.2/src/Xerces/CMakeLists.txt.flags	2011-09-01 21:47:32.000000000 +0200
+++ sigil-0.4.2/src/Xerces/CMakeLists.txt	2011-12-13 18:03:07.000000000 +0100
@@ -164,13 +164,6 @@ else()
         add_definitions( -DXERCES_USE_TRANSCODER_GNUICONV )
     endif()
     
-    if( CMAKE_COMPILER_IS_GNUCXX )
-        # SSE2 autodetection sometimes fails on Linux, so we'll just
-        # require the presence of SSE2. Everything since the year 2000 (Pentium 4)
-        # has it, so it's not like we're leaving anyone out.
-        add_definitions( -msse2 ) 
-    endif()
-                   
     # We need to link to pthreads on unix                                 
     target_link_libraries( ${PROJECT_NAME} pthread )
                        
diff -up sigil-0.4.2/src/Xerces/xercesc/util/Xerces_autoconf_config.hpp.flags sigil-0.4.2/src/Xerces/xercesc/util/Xerces_autoconf_config.hpp
--- sigil-0.4.2/src/Xerces/xercesc/util/Xerces_autoconf_config.hpp.flags	2011-12-13 18:10:04.000000000 +0100
+++ sigil-0.4.2/src/Xerces/xercesc/util/Xerces_autoconf_config.hpp	2011-12-13 18:13:07.000000000 +0100
@@ -52,11 +52,9 @@
 #define XERCES_AUTOCONF 1
 #define XERCES_HAVE_SYS_TYPES_H 1
 #define XERCES_HAVE_INTTYPES_H 1
-/* #undef XERCES_HAVE_INTRIN_H */
-#ifndef __APPLE__
-#   define XERCES_HAVE_EMMINTRIN_H 1
-#endif
-/* #undef XERCES_INCLUDE_WCHAR_H */
+#undef XERCES_HAVE_INTRIN_H
+#undef XERCES_HAVE_EMMINTRIN_H
+#undef XERCES_INCLUDE_WCHAR_H
 
 #define XERCES_S16BIT_INT int16_t
 #define XERCES_S32BIT_INT int32_t
@@ -71,15 +69,12 @@
 #define XERCES_HAS_CPP_NAMESPACE 1
 #define XERCES_STD_NAMESPACE 1
 #define XERCES_NEW_IOSTREAMS 1
-/* #undef XERCES_NO_NATIVE_BOOL */
+#undef XERCES_NO_NATIVE_BOOL
 #define XERCES_LSTRSUPPORT 1
 
-/* #undef XERCES_HAVE_CPUID_INTRINSIC */
-#ifndef __APPLE__
-#   define XERCES_HAVE_SSE2_INTRINSIC 1
-#endif
-//#define XERCES_HAVE_GETCPUID 1
-#undef XERCES_HAVE_GETCPUID 
+#undef XERCES_HAVE_CPUID_INTRINSIC
+#undef XERCES_HAVE_SSE2_INTRINSIC
+#undef XERCES_HAVE_GETCPUID
 
 #define XERCES_PLATFORM_EXPORT 
 #define XERCES_PLATFORM_IMPORT