git and C++ workflow, how to handle object and archive files?

Question

I use git to interface with an SVN repository. I have several git branches for the different projects I work on.

Now, whenever I switch from one branch to another using

Answer 1

If the compiled executables are files that have been checked in
then git stash solves the problem.

[compile]
git stash save "first branch"
git checkout other_branch
[Fiddle with your code]
[compile]
git stash save "second branch"
git checkout first_branch
git stash apply [whatever index your "first branch" stash has]
# alternatively git stash pop [whatever index...]

If the compiled executables are files that have not and will not be checked in
then simply add them to .gitignore