icu: make filtered data generation optional, serial and off by default
Backported from master with two differences:
1. Move exit in do_make_icudata_class-target after big endian patch
application (not required for master since new upstream icu includes
the patch)
2. In do_install_append_class-target test for existence of .dat input
file before calling icupkg
icu data generation was found to be racy, and causig AB failures;
making it serial and leaving it on is not an option as it regresses
to several minutes.
The specific bug is that rules.mk has:
LD_LIBRARY_PATH=../lib:../stubdata:../tools/ctestfw:$LD_LIBRARY_PATH ../bin/gencnval -s . -d ./out/build/icudt66l mappings/convrtrs.txt
which creates a file and numerous rules like
LD_LIBRARY_PATH=../lib:../stubdata:../tools/ctestfw:$LD_LIBRARY_PATH ../bin/genrb -s ./misc -d ./out/build/icudt67l -i ./out/build/icudt67l -k -q numberingSystems.txt
which quietly read it. There is no prerequisite for the former to complete first.
The race is extra complicated to fix as rules.mk is itself
generated through a custom in-tree python tool.
Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit
df89e8d1136fd406ba35ae573e2cb0cfc88c6aad)
Signed-off-by: Steve Sakoman <steve@sakoman.com>
