On Sat, 21 Mar 2020, Peter Maydell wrote:
AIUI from Paolo, the intention is to deprecate and eventually
stop supporting "in-tree" builds, so that the only option is
building in a separate build directory. I thought we should
probably mention that in the 5.0 changelog, so I wrote up some
text:
https://wiki.qemu.org/ChangeLog/5.0#Build_Information
Suggestions for changes/comments etc welcome.
(One thing we will need to fix before we can do separate build
tree is the Coverity Scan build process, which (a) does an
in-tree build (b) can't be easily switched to a builddir because
all the source paths get baked into the scan results and moving
to a builddir changes them all...)
We could also make configure actively warn if used in
the source tree.
This was discussed before. I think instead of annoying people with a
warning, rather configure should be changed to create a build dir if run
from source and have a Makefile in top dir that runs make -C builddir so
people don't have to care about this or change their ways and can continue
to run configure && make from source dir but you don't have to support
in-tree build. Then you can deprecate in-tree builds but supporting only
out-of-tree without this convenience would not just unnecessarily annoy
those who prefer working in a single tree but people (and apparently some
tools) expect sources to build with usual configure; make; make install so
that should be the minimum to support.
Regards,
BALATON Zoltan
