Re: [PATCH v2 0/6] buildsys: Build faster (mostly tools and linux-user)

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

On 1/18/20 3:06 PM, Philippe Mathieu-Daudé wrote:
> In some configuration (linux-user, tools) we can ignore building
> various objects (and the libfdt).
> 
> Tested with all the combinations of --[enable|disable]-tools,
> --[enable|disable]-user and --[enable|disable]-system using the
> following commands (suggested by Laurent Vivier in v1):
> 
>    $ mkdir build
>    $ cd build
>    $ for user in enable disable; do \
>          for tools in enable disable; do \
>              for system in enable disable; do \
>                  rm -fr build-$user-$system-$tools && \
>                  mkdir build-$user-$system-$tools && \
>                      (cd build-$user-$system-$tools && \
>                       ../../configure \
>                                       --${user}-user \
>                                       --${system}-system \
>                                       --${tools}-tools \
>                                       --disable-docs \
>                      ); \
>              done; \
>          done; \
>      done
> 
> Then building each of the 8 subdirectories on x86_64 and aarch64
> hosts, running 'make check', and only on x86_64:
> 'make run-tcg-tests-x86_64-linux-user'.
> 
> All CI green:
> https://gitlab.com/philmd/qemu/pipelines/110420332
> https://travis-ci.org/philmd/qemu/builds/638781159
> https://app.shippable.com/github/philmd/qemu/runs/587/summary/console
> 
> Since v1:
> - no code change, improved commit description, added review tags
> - added 2 new patches touching hw/core/ (remove reset.o from linux-user)
> 
> $ git backport-diff -u v1
> Key:
> [----] : patches are identical
> [####] : number of functional differences between upstream/downstream patch
> [down] : patch is downstream-only
> The flags [FC] indicate (F)unctional and (C)ontextual differences, respectively
> 
> 001/6:[----] [--] 'configure: Do not build libfdt if not required'
> 002/6:[----] [--] 'Makefile: Clarify all the codebase requires qom/ objects'
> 003/6:[----] [--] 'Makefile: Restrict system emulation and tools objects'
> 004/6:[----] [--] 'Makefile: Remove unhelpful comment'
> 005/6:[down] 'hw/core: Restrict reset handlers API to system-mode'
> 006/6:[down] 'hw/core/Makefile: Group generic objects versus system-mode objects'
> 
> Supersedes: <20200109153939.27173-1-philmd@redhat.com>

   ^ testing latest patchew feature, v2 has different subject name
     than v1, but patchew successfully linked them :)

See "Diff against v1" in v2:
https://patchew.org/QEMU/20200118140619.26333-1-philmd@redhat.com/

https://patchew.org/QEMU/20200109153939.27173-1-philmd@redhat.com/diff/20200118140619.26333-1-philmd@redhat.com/

Thanks Kevin & Paolo for this feature :)