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How to How the Compilation Arch inside Qt

  • I trying to create a generic "About dialog", and I want to show on the label a information about the arch of app compilation (like 32bits, 64bits, x86 or x86_64...)...
    It's possible to make something like this on Qt?
    Thanks all.

  • Anyone?!

  • Moderators

    QSysInfo::WordSize has the word size of the platform.

  • Hello.
    I guess there is one way to achieve what you want. But it may be to difficult. Add new compilation step:

    Get output of GCC

    Parse it

    Put results into some header file

    Include this file into you project



    But I realy don't know how to make it, but I didn't ever try.

  • Thanks all.


  • To be precise Tobias, QSysInfo::WordSize() gives you the compiled size. Here is some code I use in Windows to find if a 32 bit app is running in an enviroment that supports 64 bit apps:

    int osPointerSize = QSysInfo::WordSize;
    if ( osPointerSize == 32 ) {
    BOOL bIsWow64 = FALSE;
    LPFN_ISWOW64PROCESS fnIsWow64Process =
    (LPFN_ISWOW64PROCESS) GetProcAddress(GetModuleHandle
    (TEXT"kernel32")), "IsWow64Process");
    if ( fnIsWow64Process != NULL ) {
    if ( !fnIsWow64Process(GetCurrentProcess(), &bIsWow64) ) {
    QMessageBox::warning(this, tr("System error"),
    tr("Failed find WOW process"));
    } else if ( bIsWow64 ) {
    osPointerSize = 64;

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