Author: Dave Gomboc
Date: 23:22:32 04/04/00
Go up one level in this thread
On April 04, 2000 at 22:02:10, Christophe Theron wrote: >On April 04, 2000 at 16:42:39, Dave Gomboc wrote: > >>On April 04, 2000 at 16:32:20, Christophe Theron wrote: >> >>>On April 04, 2000 at 14:36:10, Frank Phillips wrote: >>> >>>>On April 03, 2000 at 22:35:47, Robert Hyatt wrote: >>>> >>>>[Snip] >>>>>>It is indicative of an uninitialized variable. A procedure call such as the >>>>>ones above simply stomp on the stack before your code gets to use the value >>>>>that was not initialized. >>>>> >>>>>you might try gcc -Wall -O2 to let it build a dependency graph and look for >>>>>such problems. If it sees a path from the top of the procedure to the bottom, >>>>>where any variable is referenced before it is initialized (local variables >>>>>only) it will give you a warning... >>>> >>>>Bob/Christophe >>>> >>>>Just as you predicted, an uninitialised variable. Everything is now back to >>>>normal. >>>> >>>>Easy when you know how……… Thanks, this was driving me insane. >>>> >>>>The gcc Wall option is very useful and found the extra variable easy. I had >>>>looked and looked and looked and…………………. >>>> >>>>Frank >>> >>> >>>I suggest to have -Wall all the time. Do not change the warning level to match >>>the needs of your sources. Change your sources so -Wall detects NO warning, and >>>it will save yourself from a lot of trouble. >>> >>> >>> Christophe >> >>Yes, I try compiling with maximum warnings on multiple compilers to catch as >>many potential problems as possible. I have used CC from SGI and CC from SUN at >>University, g++ at home and there, and MSVC and IBM VisualAge for C++ from home. >> Going through that process brings my attention to all sorts of things that I >>might well have missed otherwise. >> >>Dave > > >The same for me. Tiger's sources have been adapted so they can be compiled on at >least 3 different compilers (DJGPP under DOS, Borland C 4.5 under Windows as a >console application, and Visual C++ 6.0 SP3 both as console app or DLL). > >With each new compiler, new potential problems have been found! > >I think that adapting a program so it can be compiled with different compilers >under various platforms helps a lot to make the code much more robust. > > > > Christophe Yes, though I sometimes cannot include MSVC anymore, because it doesn't accept the latest C++ language features. I wonder if Eugene can be bribed? :) Dave
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