selftest build is fairly noisy, it's easy to miss warnings. It's standard practice to add alternative messages in the Makefile. I was grepping for existing solutions, and found that bpf already has the right knobs.

Move them to lib.mk and adopt in net. Convert the basic rules in lib.mk.

Signed-off-by: Jakub Kicinski kuba@kernel.org --- If this is okay with everyone, can we possibly apply it to net-next?

CC: ast@kernel.org CC: daniel@iogearbox.net CC: andrii@kernel.org CC: martin.lau@linux.dev CC: eddyz87@gmail.com CC: song@kernel.org CC: yonghong.song@linux.dev CC: john.fastabend@gmail.com CC: kpsingh@kernel.org CC: sdf@google.com CC: haoluo@google.com CC: jolsa@kernel.org CC: mykolal@fb.com CC: shuah@kernel.org CC: nathan@kernel.org CC: ndesaulniers@google.com CC: morbo@google.com CC: justinstitt@google.com CC: bpf@vger.kernel.org CC: linux-kselftest@vger.kernel.org CC: llvm@lists.linux.dev --- tools/testing/selftests/bpf/Makefile | 13 +------------ tools/testing/selftests/lib.mk | 17 ++++++++++++++++- tools/testing/selftests/net/Makefile | 9 ++++++--- 3 files changed, 23 insertions(+), 16 deletions(-)

diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile index b0be07f29dde..f06c527eee34 100644 --- a/tools/testing/selftests/bpf/Makefile +++ b/tools/testing/selftests/bpf/Makefile @@ -135,18 +135,7 @@ TEST_GEN_PROGS_EXTENDED = test_sock_addr test_skb_cgroup_id_user \

TEST_GEN_FILES += liburandom_read.so urandom_read sign-file uprobe_multi

-# Emit succinct information message describing current building step -# $1 - generic step name (e.g., CC, LINK, etc); -# $2 - optional "flavor" specifier; if provided, will be emitted as [flavor]; -# $3 - target (assumed to be file); only file name will be emitted; -# $4 - optional extra arg, emitted as-is, if provided. -ifeq ($(V),1) -Q = -msg = -else -Q = @ -msg = @printf ' %-8s%s %s%s\n' "$(1)" "$(if $(2), [$(2)])" "$(notdir $(3))" "$(if $(4), $(4))"; -MAKEFLAGS += --no-print-directory +ifneq ($(V),1) submake_extras := feature_display=0 endif

diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk index da2cade3bab0..aeeac5f83492 100644 --- a/tools/testing/selftests/lib.mk +++ b/tools/testing/selftests/lib.mk @@ -44,6 +44,20 @@ endif selfdir = $(realpath $(dir $(filter %/lib.mk,$(MAKEFILE_LIST)))) top_srcdir = $(selfdir)/../../..

+# msg: emit succinct information message describing current building step +# $1 - generic step name (e.g., CC, LINK, etc); +# $2 - optional "flavor" specifier; if provided, will be emitted as [flavor]; +# $3 - target (assumed to be file); only file name will be emitted; +# $4 - optional extra arg, emitted as-is, if provided. +ifeq ($(V),1) +Q = +msg = +else +Q = @ +msg = @printf ' %-8s%s %s%s\n' "$(1)" "$(if $(2), [$(2)])" "$(notdir $(3))" "$(if $(4), $(4))"; +MAKEFLAGS += --no-print-directory +endif + ifeq ($(KHDR_INCLUDES),) KHDR_INCLUDES := -isystem $(top_srcdir)/usr/include endif @@ -176,7 +190,8 @@ endif ifeq ($(OVERRIDE_TARGETS),) LOCAL_HDRS += $(selfdir)/kselftest_harness.h $(selfdir)/kselftest.h $(OUTPUT)/%:%.c $(LOCAL_HDRS) - $(LINK.c) $(filter-out $(LOCAL_HDRS),$^) $(LDLIBS) -o $@ + $(call msg,CC,,$@) + $(Q)$(LINK.c) $(filter-out $(LOCAL_HDRS),$^) $(LDLIBS) -o $@

$(OUTPUT)/%.o:%.S $(COMPILE.S) $^ -o $@ diff --git a/tools/testing/selftests/net/Makefile b/tools/testing/selftests/net/Makefile index a3c781cb8367..7e7f243d0ab2 100644 --- a/tools/testing/selftests/net/Makefile +++ b/tools/testing/selftests/net/Makefile @@ -125,7 +125,8 @@ BPFOBJ := $(BUILD_DIR)/libbpf/libbpf.a

MAKE_DIRS := $(BUILD_DIR)/libbpf $(MAKE_DIRS): - mkdir -p $@ + $(call msg,MKDIR,,$@) + $(Q)mkdir -p $@

# Get Clang's default includes on this system, as opposed to those seen by # '--target=bpf'. This fixes "missing" files on some architectures/distros, @@ -149,13 +150,15 @@ BPF_PROG_OBJS := $(OUTPUT)/nat6to4.o $(OUTPUT)/xdp_dummy.o \ $(OUTPUT)/sample_map_ret0.bpf.o $(OUTPUT)/sample_ret0.bpf.o

$(BPF_PROG_OBJS): $(OUTPUT)/%.o : %.c $(BPFOBJ) | $(MAKE_DIRS) - $(CLANG) -O2 -g --target=bpf $(CCINCLUDE) $(CLANG_SYS_INCLUDES) \ + $(call msg,BPF_PROG,,$@) + $(Q)$(CLANG) -O2 -g --target=bpf $(CCINCLUDE) $(CLANG_SYS_INCLUDES) \ -c $< -o $@

$(BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDIR)/Makefile) \ $(APIDIR)/linux/bpf.h \ | $(BUILD_DIR)/libbpf - $(MAKE) $(submake_extras) -C $(BPFDIR) OUTPUT=$(BUILD_DIR)/libbpf/ \ + $(call msg,MAKE,,$@) + $(Q)$(MAKE) $(submake_extras) -C $(BPFDIR) OUTPUT=$(BUILD_DIR)/libbpf/ \ EXTRA_CFLAGS='-g -O0' \ DESTDIR=$(SCRATCH_DIR) prefix= all install_headers