[PATCH v2 net] selftests/bpf: fix broken build, take 2

[PATCH v2 net] selftests/bpf: fix broken build, take 2

[Zi Shen Lim]

Merge of 'linux-kselftest-4.11-rc1':

1. Partially removed use of 'test_objs' target, breaking force rebuild of
BPFOBJ, introduced in commit d498f8719a09 ("bpf: Rebuild bpf.o for any
dependency update").

  Update target so dependency on BPFOBJ is restored.

2. Introduced commit 2047f1d8ba28 ("selftests: Fix the .c linking rule")
which fixes order of LDLIBS.

  Commit d02d8986a768 ("bpf: Always test unprivileged programs") added
libcap dependency into CFLAGS. Use LDLIBS instead to fix linking of
test_verifier.

3. Introduced commit d83c3ba0b926 ("selftests: Fix selftests build to
just build, not run tests").

  Reordering the Makefile allows us to remove the 'all' target.

Tested both:
    selftests/bpf$ make
and
    selftests$ make TARGETS=bpf
on Ubuntu 16.04.2.

Signed-off-by: Zi Shen Lim <zlim.lnx@gmail.com>
---
v1:
  - Fixed build from selftests/bpf/.
v2:
  - Fixed build from selftests/ also.

 tools/testing/selftests/bpf/Makefile | 19 ++++++++++---------
 1 file changed, 10 insertions(+), 9 deletions(-)

diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
index 67531f4..6a1ad58 100644
--- a/tools/testing/selftests/bpf/Makefile
+++ b/tools/testing/selftests/bpf/Makefile
@@ -1,22 +1,23 @@
 LIBDIR := ../../../lib
-BPFOBJ := $(LIBDIR)/bpf/bpf.o
+BPFDIR := $(LIBDIR)/bpf
 
-CFLAGS += -Wall -O2 -lcap -I../../../include/uapi -I$(LIBDIR) $(BPFOBJ)
+CFLAGS += -Wall -O2 -I../../../include/uapi -I$(LIBDIR)
+LDLIBS += -lcap
 
 TEST_GEN_PROGS = test_verifier test_tag test_maps test_lru_map test_lpm_map
 
 TEST_PROGS := test_kmod.sh
 
-all: $(TEST_GEN_PROGS)
+include ../lib.mk
+
+BPFOBJ := $(OUTPUT)/bpf.o
+
+$(TEST_GEN_PROGS): $(BPFOBJ)
 
-.PHONY: all clean force
+.PHONY: force
 
 # force a rebuild of BPFOBJ when its dependencies are updated
 force:
 
 $(BPFOBJ): force
-	$(MAKE) -C $(dir $(BPFOBJ))
-
-$(test_objs): $(BPFOBJ)
-
-include ../lib.mk
+	$(MAKE) -C $(BPFDIR) OUTPUT=$(OUTPUT)/
-- 
2.7.4

Re: [PATCH v2 net] selftests/bpf: fix broken build, take 2

[Daniel Borkmann]

On 03/20/2017 07:03 AM, Zi Shen Lim wrote:
> Merge of 'linux-kselftest-4.11-rc1':
>
> 1. Partially removed use of 'test_objs' target, breaking force rebuild of
> BPFOBJ, introduced in commit d498f8719a09 ("bpf: Rebuild bpf.o for any
> dependency update").
>
>    Update target so dependency on BPFOBJ is restored.
>
> 2. Introduced commit 2047f1d8ba28 ("selftests: Fix the .c linking rule")
> which fixes order of LDLIBS.
>
>    Commit d02d8986a768 ("bpf: Always test unprivileged programs") added
> libcap dependency into CFLAGS. Use LDLIBS instead to fix linking of
> test_verifier.
>
> 3. Introduced commit d83c3ba0b926 ("selftests: Fix selftests build to
> just build, not run tests").
>
>    Reordering the Makefile allows us to remove the 'all' target.
>
> Tested both:
>      selftests/bpf$ make
> and
>      selftests$ make TARGETS=bpf
> on Ubuntu 16.04.2.
>
> Signed-off-by: Zi Shen Lim <zlim.lnx@gmail.com>

Looks reasonable to me as follow up to 1da8ac7c49fb ("selftests/bpf:
fix broken build"), thanks for fixing Zi!

Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Tested-by: Daniel Borkmann <daniel@iogearbox.net>

Re: [PATCH v2 net] selftests/bpf: fix broken build, take 2

[Alexei Starovoitov]

On Mon, Mar 20, 2017 at 04:31:28PM +0100, Daniel Borkmann wrote:
> On 03/20/2017 07:03 AM, Zi Shen Lim wrote:
> >Merge of 'linux-kselftest-4.11-rc1':
> >
> >1. Partially removed use of 'test_objs' target, breaking force rebuild of
> >BPFOBJ, introduced in commit d498f8719a09 ("bpf: Rebuild bpf.o for any
> >dependency update").
> >
> >   Update target so dependency on BPFOBJ is restored.
> >
> >2. Introduced commit 2047f1d8ba28 ("selftests: Fix the .c linking rule")
> >which fixes order of LDLIBS.
> >
> >   Commit d02d8986a768 ("bpf: Always test unprivileged programs") added
> >libcap dependency into CFLAGS. Use LDLIBS instead to fix linking of
> >test_verifier.
> >
> >3. Introduced commit d83c3ba0b926 ("selftests: Fix selftests build to
> >just build, not run tests").
> >
> >   Reordering the Makefile allows us to remove the 'all' target.
> >
> >Tested both:
> >     selftests/bpf$ make
> >and
> >     selftests$ make TARGETS=bpf
> >on Ubuntu 16.04.2.
> >
> >Signed-off-by: Zi Shen Lim <zlim.lnx@gmail.com>
> 
> Looks reasonable to me as follow up to 1da8ac7c49fb ("selftests/bpf:
> fix broken build"), thanks for fixing Zi!
> 
> Acked-by: Daniel Borkmann <daniel@iogearbox.net>
> Tested-by: Daniel Borkmann <daniel@iogearbox.net>

worked for me as well:
Acked-by: Alexei Starovoitov <ast@kernel.org>
Tested-by: Alexei Starovoitov <ast@kernel.org>

Re: [PATCH v2 net] selftests/bpf: fix broken build, take 2

[Shuah Khan]

On 03/20/2017 09:45 AM, Alexei Starovoitov wrote:
> On Mon, Mar 20, 2017 at 04:31:28PM +0100, Daniel Borkmann wrote:
>> On 03/20/2017 07:03 AM, Zi Shen Lim wrote:
>>> Merge of 'linux-kselftest-4.11-rc1':
>>>
>>> 1. Partially removed use of 'test_objs' target, breaking force rebuild of
>>> BPFOBJ, introduced in commit d498f8719a09 ("bpf: Rebuild bpf.o for any
>>> dependency update").
>>>
>>>   Update target so dependency on BPFOBJ is restored.
>>>
>>> 2. Introduced commit 2047f1d8ba28 ("selftests: Fix the .c linking rule")
>>> which fixes order of LDLIBS.
>>>
>>>   Commit d02d8986a768 ("bpf: Always test unprivileged programs") added
>>> libcap dependency into CFLAGS. Use LDLIBS instead to fix linking of
>>> test_verifier.
>>>
>>> 3. Introduced commit d83c3ba0b926 ("selftests: Fix selftests build to
>>> just build, not run tests").
>>>
>>>   Reordering the Makefile allows us to remove the 'all' target.
>>>
>>> Tested both:
>>>     selftests/bpf$ make
>>> and
>>>     selftests$ make TARGETS=bpf
>>> on Ubuntu 16.04.2.
>>>
>>> Signed-off-by: Zi Shen Lim <zlim.lnx@gmail.com>
>>
>> Looks reasonable to me as follow up to 1da8ac7c49fb ("selftests/bpf:
>> fix broken build"), thanks for fixing Zi!
>>
>> Acked-by: Daniel Borkmann <daniel@iogearbox.net>
>> Tested-by: Daniel Borkmann <daniel@iogearbox.net>
> 
> worked for me as well:
> Acked-by: Alexei Starovoitov <ast@kernel.org>
> Tested-by: Alexei Starovoitov <ast@kernel.org>
> 
> 
> 

David,

Could you please apply it to your tree. I think you already applied
the first fix.

Acked-by: Shuah Khan <shuahkh@osg.samsung.com>

thanks,
-- Shuah

Re: [PATCH v2 net] selftests/bpf: fix broken build, take 2

[David Miller]

From: Shuah Khan <shuah@kernel.org>
Date: Mon, 20 Mar 2017 10:37:26 -0600

> On 03/20/2017 09:45 AM, Alexei Starovoitov wrote:
>> On Mon, Mar 20, 2017 at 04:31:28PM +0100, Daniel Borkmann wrote:
>>> On 03/20/2017 07:03 AM, Zi Shen Lim wrote:
>>>> Merge of 'linux-kselftest-4.11-rc1':
>>>>
>>>> 1. Partially removed use of 'test_objs' target, breaking force rebuild of
>>>> BPFOBJ, introduced in commit d498f8719a09 ("bpf: Rebuild bpf.o for any
>>>> dependency update").
>>>>
>>>>   Update target so dependency on BPFOBJ is restored.
>>>>
>>>> 2. Introduced commit 2047f1d8ba28 ("selftests: Fix the .c linking rule")
>>>> which fixes order of LDLIBS.
>>>>
>>>>   Commit d02d8986a768 ("bpf: Always test unprivileged programs") added
>>>> libcap dependency into CFLAGS. Use LDLIBS instead to fix linking of
>>>> test_verifier.
>>>>
>>>> 3. Introduced commit d83c3ba0b926 ("selftests: Fix selftests build to
>>>> just build, not run tests").
>>>>
>>>>   Reordering the Makefile allows us to remove the 'all' target.
>>>>
>>>> Tested both:
>>>>     selftests/bpf$ make
>>>> and
>>>>     selftests$ make TARGETS=bpf
>>>> on Ubuntu 16.04.2.
>>>>
>>>> Signed-off-by: Zi Shen Lim <zlim.lnx@gmail.com>
>>>
>>> Looks reasonable to me as follow up to 1da8ac7c49fb ("selftests/bpf:
>>> fix broken build"), thanks for fixing Zi!
>>>
>>> Acked-by: Daniel Borkmann <daniel@iogearbox.net>
>>> Tested-by: Daniel Borkmann <daniel@iogearbox.net>
>> 
>> worked for me as well:
>> Acked-by: Alexei Starovoitov <ast@kernel.org>
>> Tested-by: Alexei Starovoitov <ast@kernel.org>
>> 
>> 
>> 
> 
> David,
> 
> Could you please apply it to your tree. I think you already applied
> the first fix.
> 
> Acked-by: Shuah Khan <shuahkh@osg.samsung.com>

Done.