Fix CMake 2.6 errors

packaging/WiX/CMakeLists.txt

+
+IF(NOT WIN32)
+  RETURN()
+ENDIF()
+
 FIND_PATH(WIX_DIR heat.exe
  	$ENV{WIX_DIR}/bin
  	$ENV{ProgramFiles}/wix/bin
-	"$ENV{ProgramFiles}/Windows Installer XML v3.0/bin"
+	"$ENV{ProgramFiles}/Windows Installer XML v3/bin"
 	"$ENV{ProgramFiles}/Windows Installer XML v3.5/bin"
 )
 
 IF(NOT WIX_DIR)
-  MESSAGE(FATAL_ERROR "Cannot find wix")
+  IF(NOT _WIX_DIR_CHECKED)
+    SET(_WIX_DIR_CHECKED 1 CACHE INTERNAL "")
+    MESSAGE(STATUS "Cannot find wix 3, installer project will not be generated")
+  ENDIF()
+  RETURN()
 ENDIF()
 
 FIND_PROGRAM(HEAT_EXECUTABLE heat ${WIX_DIR})
 FIND_PROGRAM(CANDLE_EXECUTABLE candle ${WIX_DIR})
 FIND_PROGRAM(LIGHT_EXECUTABLE light ${WIX_DIR})
-
  
 CONFIGURE_FILE(${CMAKE_CURRENT_SOURCE_DIR}/create_msi.cmake.in
   ${CMAKE_CURRENT_BINARY_DIR}/create_msi.cmake
@@ -21,7 +29,7 @@ IF(CMAKE_GENERATOR MATCHES "Visual Studio")
  SET(CONFIG_PARAM "-DCMAKE_INSTALL_CONFIG_NAME=${CMAKE_CFG_INTDIR}")
 ENDIF()
 ADD_CUSTOM_TARGET(
-  WIX_Installer
+  MSI
   COMMAND set VS_UNICODE_OUTPUT=
   COMMAND ${CMAKE_COMMAND} ${CONFIG_PARAM} -P  ${CMAKE_CURRENT_BINARY_DIR}/create_msi.cmake
 )

packaging/WiX/create_msi.cmake.in

@@ -24,9 +24,11 @@ FOREACH(comp ${CPACK_COMPONENTS_ALL})
  EXECUTE_PROCESS(
   COMMAND ${CMAKE_COMMAND} ${CONFIG_PARAM} -DCMAKE_INSTALL_COMPONENT=${comp}  
    -DCMAKE_INSTALL_PREFIX=  -P ${CMAKE_BINARY_DIR}/cmake_install.cmake
+   OUTPUT_QUIET
   )
 ENDFOREACH()
 
+SET(INC_VAR 0)
 MACRO(MAKE_WIX_IDENTIFIER str varname)
   STRING(REPLACE "/" "." ${varname} "${str}")
   STRING(REGEX REPLACE "[^a-zA-Z_0-9.]" "_" ${varname} "${${varname}}")
@@ -35,9 +37,9 @@ MACRO(MAKE_WIX_IDENTIFIER str varname)
   # We have to cut down the length to 70 chars, since we add 2 char prefix
   # pretty often
   IF(len GREATER 70)
-   STRING(RANDOM r)
-   STRING(SUBSTRING  "${${varname}}" 0 65 shortstr)
-   SET(${varname} "${shortstr}${r}")
+   STRING(SUBSTRING  "${${varname}}" 0 67 shortstr)
+   MATH(EXPR INC_VAR ${INC_VAR}+1)
+   SET(${varname} "${shortstr}${INC_VAR}")
   ENDIF()
 ENDMACRO()