Nathan Sidwell <[EMAIL PROTECTED]> wrote: > Christian Joensson wrote: >> I'd just like to ask if this is noticed: >> >> /usr/local/src/trunk/gcc/gcc/unwind-dw2.c:324: warning: dereferencing >> type-punned pointer will break strict-aliasing rules >> /usr/local/src/trunk/gcc/gcc/unwind-dw2.c:789: warning: dereferencing >> type-punned pointer will break strict-aliasing rules >> /usr/local/src/trunk/gcc/gcc/unwind-dw2.c:1005: warning: >> dereferencing type-punned pointer will break strict-aliasing rules >> /usr/local/src/trunk/gcc/gcc/unwind-dw2-fde.c:1024: warning: >> dereferencing type-punned pointer will break strict-aliasing rules >> /usr/local/src/trunk/gcc/gcc/unwind-dw2-fde-glibc.c:393: warning: >> dereferencing type-punned pointer will break strict-aliasing rules > > I had not noticed this, but looking at the first one it must have > been caused by my patch to the type punning warning. It also appears > to be a correct warning, in that we are breaking aliasing.
I see also these in my builds: ../../../gcc/libmudflap/mf-runtime.c:320: warning: dereferencing type-punned pointer will break strict-aliasing rules ../../../gcc/libmudflap/mf-runtime.c:323: warning: dereferencing type-punned pointer will break strict-aliasing rules ../../../gcc/libmudflap/mf-runtime.c:326: warning: dereferencing type-punned pointer will break strict-aliasing rules ../../../gcc/libmudflap/mf-runtime.c:329: warning: dereferencing type-punned pointer will break strict-aliasing rules ../../../gcc/libmudflap/mf-runtime.c:333: warning: dereferencing type-punned pointer will break strict-aliasing rules ../../../gcc/libmudflap/mf-runtime.c:336: warning: dereferencing type-punned pointer will break strict-aliasing rules ../../../gcc/libmudflap/mf-runtime.c:339: warning: dereferencing type-punned pointer will break strict-aliasing rules ../../../gcc/libmudflap/mf-runtime.c:342: warning: dereferencing type-punned pointer will break strict-aliasing rules The code is accessing a variable of enum type through an unsigned pointer. Giovanni Bajo
