How can we know about version of gcc?

[Brooks Moses]

h2005421@bits-pilani.ac.in wrote:
> Hi!
> if i want to know about version of gcc, for which patch has been submitted
> ? than how should i know?
> Specifically the patch named "[tree-ssa, RFC] new, very experimental
> ssa-vn"
> at 5th jan 2004 , for which version it is submitted?
> Is it applicable for gcc-4.0.2?
> 
> Help me soon to figure it out......

Patches, unless otherwise documented, are generally for the version in 
current development when the patch was submitted.  This one, with 
"tree-ssa" in the title, means that it was for the "tree-ssa" branch 
rather than the main development version.

Thus, the only really meaningful answer is that this particular patch 
was submitted for the version of GCC that existed on 2004-01-05 in the 
"tree-ssa" code branch.  This almost certainly does not correspond very 
closely to any released version.

If you look at the timeline at http://gcc.gnu.org/develop.html, it shows 
that 5th January 2004 was shortly before the GCC 3.4 branch.  Thus, most 
likely, GCC 3.4.0 will be the closest released version to the version 
that patch was submitted for, but it is still probably substantially 
different.

Further, in this case, there's a note on the timeline that on May 17th, 
2004, the "tree-ssa" branch was merged into mainline (that is, into the 
main development version), and the result eventually became GCC 4.0. 
Thus, I would guess that this particular patch -- or something like it, 
or something better -- was already included in GCC 4.0.0 when it was 
released.

- Brooks