kou commented on a change in pull request #12023:
URL: https://github.com/apache/arrow/pull/12023#discussion_r774191563
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File path: ci/scripts/cpp_build.sh
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@@ -144,6 +159,8 @@ cmake \
if [ ! -z "${CPP_MAKE_PARALLELISM}" ]; then
time cmake --build . --target install -- -j${CPP_MAKE_PARALLELISM}
+elif [ "${CMAKE_GENERATOR}" == "Unix Makefiles" ]; then
+ time cmake --build . --target install -- -j$[${n_jobs} + 1]
Review comment:
Ah, sorry.
`${NPROC:-1}` uses `1` not `-1` as the default value.
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