boost: limit concurrent jobs to the maximum supported number (#47255)

This commit is contained in:
Andrew Dunham 2018-09-24 09:21:16 -07:00 committed by xeji
parent e10361b30a
commit ba278c3b87

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@ -47,10 +47,24 @@ let
# To avoid library name collisions
layout = if taggedLayout then "tagged" else "system";
# Versions of b2 before 1.65 have job limits; specifically:
# - Versions before 1.58 support up to 64 jobs[0]
# - Versions before 1.65 support up to 256 jobs[1]
#
# [0]: https://github.com/boostorg/build/commit/0ef40cb86728f1cd804830fef89a6d39153ff632
# [1]: https://github.com/boostorg/build/commit/316e26ca718afc65d6170029284521392524e4f8
jobs =
if versionOlder version "1.58" then
"$(($NIX_BUILD_CORES<=64 ? $NIX_BUILD_CORES : 64))"
else if versionOlder version "1.65" then
"$(($NIX_BUILD_CORES<=256 ? $NIX_BUILD_CORES : 256))"
else
"$NIX_BUILD_CORES";
b2Args = concatStringsSep " " ([
"--includedir=$dev/include"
"--libdir=$out/lib"
"-j$NIX_BUILD_CORES"
"-j${jobs}"
"--layout=${layout}"
"variant=${variant}"
"threading=${threading}"