On Thu, Nov 19, 2009 at 2:55 PM, Mark Wielaard <m...@redhat.com> wrote: > On Thu, 2009-11-19 at 19:15 +0530, M. Mohan Kumar wrote: >> On 11/19/2009 04:30 PM, Mark Wielaard wrote: >> > On Wed, 2009-11-18 at 18:19 +0530, M. Mohan Kumar wrote: >> >> Are VTA patches part of mainline gcc now? If not, where could we get the >> >> VTA patches? >> > >> > The VTA implementation is in mainline gcc now. There are also some >> > backports to gcc 4.4, like the gcc that Fedora 12 ships with. >> >> Thank you very much for the info. Is there any option needs to be passed >> to gcc to enable this VTA feature?
It is enabled by default when -g is specified. Richard. > See the following options from: > http://gcc.gnu.org/onlinedocs/gcc/Debugging-Options.html#Debugging-Options > > -fvar-tracking > Run variable tracking pass. It computes where variables are > stored at each position in code. Better debugging information is > then generated (if the debugging information format supports > this information). > > It is enabled by default when compiling with optimization (-Os, > -O, -O2, ...), debugging information (-g) and the debug info > format supports it. > > > -fvar-tracking-assignments > Annotate assignments to user variables early in the compilation > and attempt to carry the annotations over throughout the > compilation all the way to the end, in an attempt to improve > debug information while optimizing. Use of -gdwarf-4 is > recommended along with it. > > It can be enabled even if var-tracking is disabled, in which > case annotations will be created and maintained, but discarded > at the end. > > >
