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?
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.
