I created a sample Qt Win CE app in Visual Studio 2008 and got the error:

Qt Code: 
  1. QtCore4.lib(QtCore4.dll) : fatal error LNK1112: module machine type 'X86' conflicts with target machine type 'THUMB'
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Here is the complete log:

Qt Code: 
  1. Build Log      Build started: Project: test11, Configuration: Release|STANDARDSDK_500 (ARMV4I)
  2.  Command Lines      Creating temporary file "c:\Qt\4.6.2\MY_EXAMPLES\test11\test11\STANDARDSDK_500 (ARMV4I)\Release\BAT0000338203436.bat" with contents
  3. [
  4. @echo off
  5.  
  6. "C:\Qt\4.6.2\bin\uic.exe" -o ".\GeneratedFiles\ui_test11.h" "c:\Qt\4.6.2\MY_EXAMPLES\test11\test11\test11.ui"
  7.  
  8.  
  9.  
  10. if errorlevel 1 goto VCReportError
  11.  
  12. goto VCEnd
  13.  
  14. :VCReportError
  15.  
  16. echo Project : error PRJ0019: A tool returned an error code from "Uic'ing test11.ui..."
  17.  
  18. exit 1
  19.  
  20. :VCEnd
  21. ]
  22. Creating command line """c:\Qt\4.6.2\MY_EXAMPLES\test11\test11\STANDARDSDK_500 (ARMV4I)\Release\BAT0000338203436.bat"""
  23. Creating temporary file "c:\Qt\4.6.2\MY_EXAMPLES\test11\test11\STANDARDSDK_500 (ARMV4I)\Release\BAT0000348203436.bat" with contents
  24. [
  25. @echo off
  26.  
  27. "C:\Qt\4.6.2\bin\rcc.exe" -name "test11" -no-compress "c:\Qt\4.6.2\MY_EXAMPLES\test11\test11\test11.qrc" -o .\GeneratedFiles\qrc_test11.cpp
  28.  
  29.  
  30.  
  31. if errorlevel 1 goto VCReportError
  32.  
  33. goto VCEnd
  34.  
  35. :VCReportError
  36.  
  37. echo Project : error PRJ0019: A tool returned an error code from "Rcc'ing test11.qrc..."
  38.  
  39. exit 1
  40.  
  41. :VCEnd
  42. ]
  43. Creating command line """c:\Qt\4.6.2\MY_EXAMPLES\test11\test11\STANDARDSDK_500 (ARMV4I)\Release\BAT0000348203436.bat"""
  44. Creating temporary file "c:\Qt\4.6.2\MY_EXAMPLES\test11\test11\STANDARDSDK_500 (ARMV4I)\Release\BAT0000358203436.bat" with contents
  45. [
  46. @echo off
  47.  
  48. "C:\Qt\4.6.2\bin\moc.exe"   -DUNDER_CE -DWINCE -D_WINDOWS -D_UNICODE -DUNICODE -D_WIN32 -DQT_NO_PRINTER -DQT_NO_PRINTDIALOG -DSTANDARDSHELL_UI_MODEL -D_WIN32_WCE=0x500 -DARMV4I -D_ARMV4I_ -Darmv4i -D_ARM_ -DARM -D_M_ARM -DARM -D__arm__ -DQ_OS_WINCE_STD -DQT_NO_PRINTER -DQT_NO_PRINTDIALOG -DQT_THREAD_SUPPORT -DQT_NO_DEBUG -DNDEBUG -DQT_CORE_LIB -DQT_GUI_LIB  -I".\GeneratedFiles\." -I"C:\Qt\4.6.2\include\." -I".\GeneratedFiles\Release\." -I"C:\Qt\4.6.2\include\qtmain\." -I"C:\Qt\4.6.2\include\QtCore\." -I"C:\Qt\4.6.2\include\QtGui\." -I".\." ".\test11.h" -o ".\GeneratedFiles\Release\moc_test11.cpp"
  49.  
  50.  
  51.  
  52. if errorlevel 1 goto VCReportError
  53.  
  54. goto VCEnd
  55.  
  56. :VCReportError
  57.  
  58. echo Project : error PRJ0019: A tool returned an error code from "Moc'ing test11.h..."
  59.  
  60. exit 1
  61.  
  62. :VCEnd
  63. ]
  64. Creating command line """c:\Qt\4.6.2\MY_EXAMPLES\test11\test11\STANDARDSDK_500 (ARMV4I)\Release\BAT0000358203436.bat"""
  65. Creating temporary file "c:\Qt\4.6.2\MY_EXAMPLES\test11\test11\STANDARDSDK_500 (ARMV4I)\Release\RSP0000368203436.rsp" with contents
  66. [
  67. /I ".\GeneratedFiles" /I "C:\Qt\4.6.2\include" /I ".\GeneratedFiles\Release" /I "C:\Qt\4.6.2\include\qtmain" /I "C:\Qt\4.6.2\include\QtCore" /I "C:\Qt\4.6.2\include\QtGui" /I ".\\" /D "UNDER_CE" /D "WINCE" /D "_WINDOWS" /D "_UNICODE" /D "UNICODE" /D "_WIN32" /D "QT_NO_PRINTER" /D "QT_NO_PRINTDIALOG" /D "STANDARDSHELL_UI_MODEL" /D "_WIN32_WCE=0x500" /D "ARMV4I" /D "_ARMV4I_" /D "armv4i" /D "_ARM_" /D "ARM" /D "_M_ARM" /D "__arm__" /D "Q_OS_WINCE_STD" /D "QT_THREAD_SUPPORT" /D "QT_NO_DEBUG" /D "NDEBUG" /D "QT_CORE_LIB" /D "QT_GUI_LIB" /FD /EHsc /MD /GS- /fp:fast /Zc:wchar_t- /GR- /Fo"STANDARDSDK_500 (ARMV4I)\Release/" /Fd"STANDARDSDK_500 (ARMV4I)\Release/vc80.pdb" /W3 /c /TP
  68.  
  69. .\main.cpp
  70.  
  71. .\GeneratedFiles\qrc_test11.cpp
  72.  
  73. .\GeneratedFiles\Release\moc_test11.cpp
  74.  
  75. .\test11.cpp
  76. ]
  77. Creating command line "cl.exe @"c:\Qt\4.6.2\MY_EXAMPLES\test11\test11\STANDARDSDK_500 (ARMV4I)\Release\RSP0000368203436.rsp" /nologo"
  78. Creating temporary file "c:\Qt\4.6.2\MY_EXAMPLES\test11\test11\STANDARDSDK_500 (ARMV4I)\Release\RSP0000378203436.rsp" with contents
  79. [
  80. /OUT:"C:\Qt\4.6.2\MY_EXAMPLES\test11\Release\test11.exe" /LIBPATH:"C:\Qt\4.6.2\lib" /LIBPATH:"C:\Program Files\Windows CE Tools\wce500\STANDARDSDK_500\Lib\ARMV4I" /MANIFEST:NO /NODEFAULTLIB:"oldnames.lib" /SUBSYSTEM:WINDOWSCE /DYNAMICBASE /NXCOMPAT /MACHINE:THUMB /SUBSYSTEM:WINDOWSCE,5.00/machine:THUMB qtmain.lib QtCore4.lib QtGui4.lib coredll.lib corelibc.lib ole32.lib oleaut32.lib uuid.lib commctrl.lib
  81.  
  82. ".\STANDARDSDK_500 (ARMV4I)\Release\main.obj"
  83.  
  84. ".\STANDARDSDK_500 (ARMV4I)\Release\test11.obj"
  85.  
  86. ".\STANDARDSDK_500 (ARMV4I)\Release\moc_test11.obj"
  87.  
  88. ".\STANDARDSDK_500 (ARMV4I)\Release\qrc_test11.obj"
  89. ]
  90. Creating command line "link.exe @"c:\Qt\4.6.2\MY_EXAMPLES\test11\test11\STANDARDSDK_500 (ARMV4I)\Release\RSP0000378203436.rsp" /NOLOGO /ERRORREPORT:PROMPT"
  91.  Output Window      Uic'ing test11.ui...
  92. Rcc'ing test11.qrc...
  93. RCC: Warning: No resources in 'c:\Qt\4.6.2\MY_EXAMPLES\test11\test11\test11.qrc'.
  94. Moc'ing test11.h...
  95. Compiling...
  96. main.cpp
  97. qrc_test11.cpp
  98. moc_test11.cpp
  99. test11.cpp
  100. Generating Code...
  101. Linking...
  102. QtCore4.lib(QtCore4.dll) : fatal error LNK1112: module machine type 'X86' conflicts with target machine type 'THUMB'
  103.  Results      Build log was saved at "file://c:\Qt\4.6.2\MY_EXAMPLES\test11\test11\STANDARDSDK_500 (ARMV4I)\Release\BuildLog.htm"
  104. test11 - 1 error(s), 0 warning(s)
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