+ echo Building: perf
+ d=../perf
+ [ -d \$d ] || mkdir \$d || exit 1
+ log_perf=\$d.log
+ echo "Forking perf build ..."
+ /usr/bin/time make -s -C tools/perf JOBS=$j_factor O=\$d > \$log_perf 2>&1 &
+
+ wait %4
+ rc=\$?
+
+ if [ \$rc -ne 0 ]; then
+ echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
+ echo "ERROR: perf build failed - log follows"
+ echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
+ cat \$log_perf
+ kill %1
+ kill %2
+ kill %3
+ killall make
+ rm .scmversion
+ exit 1
+ else
+ echo "============================"
+ echo " perf build OK - log follows"
+ echo "============================"
+ cat \$log_perf
+ fi
+