James Dennett wrote: > On Mon, Jan 26, 2009 at 11:52 PM, <zol...@bendor.com.au> wrote: >> I was debugging a function and by inserting the debug statement crashed >> the system. Some investigation revealed that gcc 4.3.2 arm-eabi (compiled >> from sources) with -O2 under some circumstances assumes that if a pointer >> is dereferenced, it can not be NULL therefore explicite tests against >> NULL can be later eliminated. > > That's an optimization permitted by the language standard, but > possibly unhelpful on your particular target.
Not really, he's just using the sloppiness allowed by MMU-less targets, but he doesn't care about the value passed to Debug if tst == NULL. However, -fno-delete-null-pointer-checks will do. Paolo
