Wouldn't the code be better if the variables were initialised in the routines itself? I think a fancy C compiler will optimize it away ... Bonny,
________________________________ Van: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Namens Mike Williamson Verzonden: woensdag 26 november 2008 13:42 Aan: Mailing list for lwIP users Onderwerp: Re: [lwip-users] About global parameter initial problem Hi Lee, I don't recommend trying to initialize all the variables in the lwIP code on your own. Our company had the same problem for the TI DSP67XX and DSP645X compiler toolchain, and we went down the path of modifying all the c code having variables needing initialization. It required analysis to figure out which ones needed it and a fair amount of time. Good luck making sure you catch them all, and good luck trying to stay in sync with the repository once you do it. The latter is a much larger headache, as you're always on the hunt for variables that need to be initialized when new features are added, etc., and every compare against the CVS root for change yeilds a pile of false positives. In the end we abandoned that approach and finally wrote a separate assembly level application entry point that forcibly cleared *all* unitialized linked data in our embedded program (we "fixed" our "broken" compiler). A little compiler and linker gynmastics, but "it was the only way to be sure". -Mike On Wed, Nov 26, 2008 at 3:05 AM, Simon Goldschmidt <[EMAIL PROTECTED]> wrote: > I find the lwIP did not manually init global parameters. In most of the And it does this on purpose. > system, the global paramter has default zero. But my embeded system only > init the static paramters, and won't init the gloable parameters. That's a bug in your compiler. We've had this discussion some months ago. Since we do not want to support broken compilers, we decided the ones with broken compilers should add initialization on their own, I think... Sorry. Initializing globals to zero is defined in the C standard somewhere. If you're interested in where (e.g. want to tell your compiler vendor to fix it), you can search the mailing list archive for the discussion, it was mentioned here a while ago. Simon -- Sensationsangebot nur bis 30.11: GMX FreeDSL - Telefonanschluss + DSL für nur 16,37 Euro/mtl.!* http://dsl.gmx.de/?ac=OM.AD.PD003K11308T4569a _______________________________________________ lwip-users mailing list [email protected] http://lists.nongnu.org/mailman/listinfo/lwip-users -- Michael Williamson 315-425-4045x230 www.criticallink.com
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