On 2012-06-17, at 11:54 PM, t-rexky wrote: > When I have a moment I will check my target configuration once again and if > this does not help I will spend some time with > a debugger to see if I can figure out where things go wrong. I'm afraid > though that I will get completely lost in the complexity > of gcc.
Unfortunately I am not able to use gdb-4.7 in a sensible way since it is having trouble with most of the data types that I need to inspect. However, I spent quite a bit more time with the compiler and I was able to make a small step in the right direction. I discovered that if I rebuild stage 3 with BOOT_CFLAGS="-g -O0", the warnings in stage 3 compiler all disappear! This is despite that fact that the stage 2 compiler was built with -O2 and continues to generate the warnings. I then tried to isolate which specific -O1 optimization flag was responsible for the issue. Unfortunately many recompiles later I determined that the issue arises from gcc -O1 optimization code that is not controlled by any of the flags that -O1 switches on. Recompiling stage 3 with all the optimization flags equivalent to -O1 produces stage 3 compiler that does not generate any of the warnings. So I am baffled and stuck yet again... >> Good luck. >> >> -- >> Vincent Rivière > > Thank you, > t-rexky
