use 'make -O' to synchronize output

buildjob

@@ -23,7 +23,7 @@ env | egrep '^(CI_BUILD_REF|CI_RUNNER)' > build-env.txt
 
 # Build
 echo_color "$BOLDGREEN" "[buildjob] Perfoming build"
-time make -k -j$CPU_CORES TIMED=y 2>&1 | tee build-log.txt
+time make -O -k -j$CPU_CORES TIMED=y 2>&1 | tee build-log.txt
 if fgrep Axiom build-log.txt >/dev/null; then exit 1; fi
 echo_color "$BOLDGREEN" "[buildjob] Build time summary"
 cat build-log.txt | egrep "(real|user): [0-9]" | tee build-time.txt