rok commented on code in PR #50317:
URL: https://github.com/apache/arrow/pull/50317#discussion_r3520539198
##########
r/inst/build_arrow_static.sh:
##########
@@ -114,7 +114,7 @@ ${CMAKE_WRAPPER} ${CMAKE} -DARROW_BOOST_USE_SHARED=OFF \
-G "${CMAKE_GENERATOR:-Unix Makefiles}" \
${SOURCE_DIR}
-${CMAKE} --build . --target install -- -j $N_JOBS
+(unset MAKEFLAGS MFLAGS; ${CMAKE} --build . --target install --parallel
"${N_JOBS}")
Review Comment:
The issue was `MAKEFLAGS=%s\n' -jNA`, which was due to `ncores <-
parallel::detectCores()` returning `NA` in `r/tools/nixlibs.R`. This should be
resolved now.
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