diff -Naur mscore-1.2.orig/mscore/CMakeLists.txt mscore-1.2.new/mscore/CMakeLists.txt
--- mscore-1.2.orig/mscore/CMakeLists.txt	2012-03-13 19:22:57.000000000 +0100
+++ mscore-1.2.new/mscore/CMakeLists.txt	2012-03-14 11:28:44.000000000 +0100
@@ -287,7 +287,7 @@
       add_custom_command(
          OUTPUT ${PROJECT_BINARY_DIR}/all.h.gch
          COMMAND ${CMAKE_CXX_COMPILER}
-           -x c++-header -g  ${FLAGS} -m32
+           -x c++-header -g  ${FLAGS} 
            -I${QT_HEADERS_DIR}
            -o all.h.gch all.h
          DEPENDS ${PROJECT_BINARY_DIR}/all.h