New Build System Ready for Integration

[Sebastian Huber]

Hello,

the new build system is now ready for integration. You find the latest 
documentation here:

https://ftp.rtems.org/pub/rtems/people/sebh/user.pdf

https://ftp.rtems.org/pub/rtems/people/sebh/eng.pdf

You can review the new build system for RTEMS BSPs here:

git clone git://git.rtems.org/sebh/rtems.git
cd rtems
git checkout --track origin/build

The new build system builds all BSPs and all tests (including the Ada 
tests). I tested the build on OpenSUSE 15.1, MinGW64, MSYS2, and FreeBSD 
12.1.

The build specification consists of

find spec -name '*.yml' -and -not -name .doorstop.yml | wc
    2011    2011  136959

YAML files. From these only 18 have hand-crafted content:

grep -r 'build-type: script' spec/ | sort
spec/build/bsps/powerpc/motorola_powerpc/RTEMS-BUILD-BSP-POWERPC-MOTOROLAPOWERPC-BOOT.yml:build-type: 
script
spec/build/bsps/powerpc/motorola_powerpc/RTEMS-BUILD-BSP-POWERPC-MOTOROLAPOWERPC-QEMUFAKEROM.yml:build-type: 
script
spec/build/bsps/powerpc/mvme5500/RTEMS-BUILD-BSP-POWERPC-MVME5500-START.yml:build-type: 
script
spec/build/bsps/powerpc/RTEMS-BUILD-BSP-POWERPC-MOTLD.yml:build-type: script
spec/build/bsps/RTEMS-BUILD-BSP-LINKCMDS.yml:build-type: script
spec/build/cpukit/RTEMS-BUILD-CPUKIT-VCKEY.yml:build-type: script
spec/build/testsuites/libtests/RTEMS-BUILD-TEST-LIB-DL01.yml:build-type: 
script
spec/build/testsuites/libtests/RTEMS-BUILD-TEST-LIB-DL02.yml:build-type: 
script
spec/build/testsuites/libtests/RTEMS-BUILD-TEST-LIB-DL04.yml:build-type: 
script
spec/build/testsuites/libtests/RTEMS-BUILD-TEST-LIB-DL05.yml:build-type: 
script
spec/build/testsuites/libtests/RTEMS-BUILD-TEST-LIB-DL06.yml:build-type: 
script
spec/build/testsuites/libtests/RTEMS-BUILD-TEST-LIB-DL07.yml:build-type: 
script
spec/build/testsuites/libtests/RTEMS-BUILD-TEST-LIB-DL08.yml:build-type: 
script
spec/build/testsuites/libtests/RTEMS-BUILD-TEST-LIB-DL09.yml:build-type: 
script
spec/build/testsuites/libtests/RTEMS-BUILD-TEST-LIB-DL10.yml:build-type: 
script
spec/build/testsuites/libtests/RTEMS-BUILD-TEST-LIB-MGHTTPD01.yml:build-type: 
script
spec/build/testsuites/libtests/RTEMS-BUILD-TEST-LIB-TAR01.yml:build-type: 
script
spec/build/testsuites/libtests/RTEMS-BUILD-TEST-LIB-TAR02.yml:build-type: 
script

So, more than 99% of the build specification is done through standard 
items. The attached script can be used to load the content of all items 
into a standard Python data structure (dictionaries, lists, strings, 
integers). The next person doing a new build system will have a much 
easier task, no more parsing of Makefile.am, configure.ac, *.cfg, and 
*.tcfg files.

My proposed next steps are:

1. I push the source and documentation patches next Monday to the main 
repositories.

2. I make it harder to use the existing build system. I add a 
--I-only-want-to-compare-results-with-the-new-build-system" to the 
top-level configure script. If this option is not present, then the 
build stops with an error. This basically disables the normal use.

3. I create a new ticket with a build system conversion checklist.

4. We announce a four month period in which we keep the old build system 
in the sources. Everyone is encouraged to test the new build system with 
the help of the checklist. The new build system should be used, fixed 
and improved.

5. If the new build system shows satisfactory results after the testing 
period, we remove the old one.

-- 
Sebastian Huber, embedded brains GmbH

Address : Dornierstr. 4, D-82178 Puchheim, Germany
Phone   : +49 89 189 47 41-16
Fax     : +49 89 189 47 41-09
E-Mail  : sebastian.huber at embedded-brains.de
PGP     : Public key available on request.

Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.
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