When building the mm selftests on a system without liburing development headers, check_config.sh leaks a raw compiler error: /tmp/tmp.kIIOIqwe3n.c:2:10: fatal error: liburing.h: No such file or directory 2 | #include | ^~~~~~~~~~~~ Since this is an expected failure during the configuration probe, redirect the compiler output to /dev/null to hide it. And the build system prints a clear warning when this occurs: Warning: missing liburing support. Some tests will be skipped. Because the user is properly notified about the missing dependency, the raw compiler error is redundant and only confuse users. Additionally, update the Makefile to use $(Q) and $(call msg,...) for the check_config.sh execution. This aligns the probe with standard kbuild output formatting, providing a clean "CHK" message instead of printing the raw command during the build. Signed-off-by: Li Wang --- tools/testing/selftests/mm/Makefile | 3 ++- tools/testing/selftests/mm/check_config.sh | 2 +- 2 files changed, 3 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/mm/Makefile b/tools/testing/selftests/mm/Makefile index 3b222cd6a048..2f6d2a207a0c 100644 --- a/tools/testing/selftests/mm/Makefile +++ b/tools/testing/selftests/mm/Makefile @@ -262,7 +262,8 @@ $(OUTPUT)/migration: LDLIBS += -lnuma $(OUTPUT)/rmap: LDLIBS += -lnuma local_config.mk local_config.h: check_config.sh - CC="$(CC)" CFLAGS="$(CFLAGS)" ./check_config.sh + $(call msg,CHK,config,$@) + $(Q)CC="$(CC)" CFLAGS="$(CFLAGS)" ./check_config.sh EXTRA_CLEAN += local_config.mk local_config.h diff --git a/tools/testing/selftests/mm/check_config.sh b/tools/testing/selftests/mm/check_config.sh index b84c82bbf875..32beaefe279e 100755 --- a/tools/testing/selftests/mm/check_config.sh +++ b/tools/testing/selftests/mm/check_config.sh @@ -16,7 +16,7 @@ echo "#include " > $tmpfile_c echo "#include " >> $tmpfile_c echo "int func(void) { return 0; }" >> $tmpfile_c -$CC $CFLAGS -c $tmpfile_c -o $tmpfile_o +$CC $CFLAGS -c $tmpfile_c -o $tmpfile_o >/dev/null 2>&1 if [ -f $tmpfile_o ]; then echo "#define LOCAL_CONFIG_HAVE_LIBURING 1" > $OUTPUT_H_FILE -- 2.53.0