Affects of 'US DST 2007 changes' on GSL.

Discussion in 'C++' started by perlguru, Feb 20, 2007.

  1. perlguru

    perlguru Guest

    I wanted to know about the affects of changes done in US DST on FSF
    library.
    My major concentration is on GSL.
    Will GSL be affected ?
    If so, Is there any patch for this ?
    Is there any article on web, showing which all FSF libraries are
    affected ?
     
    perlguru, Feb 20, 2007
    #1
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  2. perlguru wrote:
    > I wanted to know about the affects of changes done in US DST on FSF
    > library.
    > My major concentration is on GSL.
    > Will GSL be affected ?
    > If so, Is there any patch for this ?
    > Is there any article on web, showing which all FSF libraries are
    > affected ?
    >


    I have no idea about GSL, but I looked into this for a company I work
    for (management were in the usual panic) and there was no problem. At
    least no problem that anyone could do anything about.

    On Windows the standard C++ time related functions get their information
    from the Windows operating system. So if the customer has applied the
    Windows patch that updates Windows with the DST changes then any program
    that uses standard C++ time functions will automatically adjust to the
    new DST rules.

    If you think about it this is no different from the situation with any
    time related function. If the user has there time set wrongly on their
    computer, your program will tell the wrong time. If they have their time
    zone set wrongly, your program will convert between local time and GMT
    wrongly.

    So as far as I can tell, the whole DST issue is a non-issue, at least as
    far as Windows. The only issue would be for programs which had their own
    DST and TZ rules hard-coded. That seems a very unlikely situation.

    john
     
    John Harrison, Feb 20, 2007
    #2
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