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

From: Philippe Mathieu-Daudé
Subject: Re: [PATCH v2 0/6] buildsys: Build faster (mostly tools and linux-user)
Date: Sat, 18 Jan 2020 15:22:37 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.2.2

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; \

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:

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
[----] : 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 

Supersedes: <address@hidden>

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

See "Diff against v1" in v2:


Thanks Kevin & Paolo for this feature :)

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