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protobuf-c: disable parallelism to avoid race condition

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Unfortunately 489d3b4b93 did not completely
fix the problem - if you try cleaning and rebuilding protobuf-c-native it
doesn't take long to reproduce the issue on a 32-core machine. I spent
some time trying to debug this but failed, there is still a race between
generating t.test-full.pb.h and compiling cxx_generate_packed_data.c
despite BUILT_SOURCES and explicit dependencies. I even tried converting
the multiple target rules to use grouped targets (&:), that didn't fix it
either. Disabling parallelism as a workaround only costs ~20s and it
turns out that upstream is switching to Meson soon anyway:

  https://github.com/protobuf-c/protobuf-c/pull/340

Signed-off-by: Paul Eggleton <paul.eggleton@linux.microsoft.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
This commit is contained in:
Paul Eggleton
2020-06-14 21:28:45 -07:00
committed by Khem Raj
parent 12072f8437
commit 3251fe210a
1 changed files with 5 additions and 0 deletions
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meta-oe/recipes-devtools/protobuf/protobuf-c_1.3.3.bb
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@@ -22,6 +22,11 @@ S = "${WORKDIR}/git"
inherit autotools pkgconfig inherit autotools pkgconfig
# After several fix attempts there is still a race between generating
# t.test-full.pb.h and compiling cxx_generate_packed_data.c despite
# BUILT_SOURCES and explicit dependencies.
PARALLEL_MAKE = ""
PACKAGE_BEFORE_PN = "${PN}-compiler" PACKAGE_BEFORE_PN = "${PN}-compiler"
FILES_${PN}-compiler = "${bindir}" FILES_${PN}-compiler = "${bindir}"