23.05.2014 20:07, Peter Maydell wrote: > When libtool support was added to configure, the new temporary files > were left out of the list of files cleaned up on exit; this results > in a lot of stale .lo files being left around in /tmp. Worse, libtool > creates a /tmp/.libs directory which we can't easily clean up. > > Put all our temporary files in a single temporary directory created > as a subdirectory of the build directory, so we can easily clean it up, > and don't need fragile or complicated code for creation to avoid it > clashing with temporary directories from other instances of QEMU > configure or being subject to attack from adversaries who can write > to /tmp. > > Since the temporaries now live in the build tree, we have no > need to jump through hoops with a trap handler to try to remove > them when configure exits; this fixes some weird bugs where hitting > ^C during a configure run wouldn't actually make it stop, because > we would run the trap handler but then not stop. (It is possible > to get the trap handler semantics right but it is convoluted largely > because of bugs in dash, so it is simpler to just avoid it.) > > Note that "temporary files go in the build directory, not /tmp" is > the way autoconf behaves. > > Signed-off-by: Peter Maydell <peter.mayd...@linaro.org> > Reviewed-by: Eric Blake <ebl...@redhat.com>
*ACK*. Applied to -trivial, thank you for doing this! /mjt
