selftests: bpf: fix urandom_read build issue
diff mbox

Message ID 20180607105712.553-1-anders.roxell@linaro.org
State New
Headers show

Commit Message

Anders Roxell June 7, 2018, 10:57 a.m. UTC
gcc complains that urandom_read gets built twice.

gcc -o tools/testing/selftests/bpf/urandom_read
-static urandom_read.c -Wl,--build-id
gcc -Wall -O2 -I../../../include/uapi -I../../../lib -I../../../lib/bpf
-I../../../../include/generated  -I../../../include    urandom_read.c
urandom_read -lcap -lelf -lrt -lpthread -o
tools/testing/selftests/bpf/urandom_read
gcc: fatal error: input file
‘tools/testing/selftests/bpf/urandom_read’ is the
same as output file
compilation terminated.
../lib.mk:110: recipe for target
'tools/testing/selftests/bpf/urandom_read' failed
To fix this issue remove the urandom_read target and so target
TEST_CUSTOM_PROGS gets used.

Fixes: 81f77fd0deeb ("bpf: add selftest for stackmap with BPF_F_STACK_BUILD_ID")
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
---
 tools/testing/selftests/bpf/Makefile | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

Comments

Y Song June 7, 2018, 5:52 p.m. UTC | #1
On Thu, Jun 7, 2018 at 3:57 AM, Anders Roxell <anders.roxell@linaro.org> wrote:
> gcc complains that urandom_read gets built twice.
>
> gcc -o tools/testing/selftests/bpf/urandom_read
> -static urandom_read.c -Wl,--build-id
> gcc -Wall -O2 -I../../../include/uapi -I../../../lib -I../../../lib/bpf
> -I../../../../include/generated  -I../../../include    urandom_read.c
> urandom_read -lcap -lelf -lrt -lpthread -o
> tools/testing/selftests/bpf/urandom_read
> gcc: fatal error: input file
> ‘tools/testing/selftests/bpf/urandom_read’ is the
> same as output file
> compilation terminated.
> ../lib.mk:110: recipe for target
> 'tools/testing/selftests/bpf/urandom_read' failed

What is the build/make command to reproduce the above failure?

> To fix this issue remove the urandom_read target and so target
> TEST_CUSTOM_PROGS gets used.
>
> Fixes: 81f77fd0deeb ("bpf: add selftest for stackmap with BPF_F_STACK_BUILD_ID")
> Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
> ---
>  tools/testing/selftests/bpf/Makefile | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
>
> diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
> index 607ed8729c06..67285591ffd7 100644
> --- a/tools/testing/selftests/bpf/Makefile
> +++ b/tools/testing/selftests/bpf/Makefile
> @@ -16,10 +16,8 @@ LDLIBS += -lcap -lelf -lrt -lpthread
>  TEST_CUSTOM_PROGS = $(OUTPUT)/urandom_read
>  all: $(TEST_CUSTOM_PROGS)
>
> -$(TEST_CUSTOM_PROGS): urandom_read
> -
> -urandom_read: urandom_read.c
> -       $(CC) -o $(TEST_CUSTOM_PROGS) -static $< -Wl,--build-id
> +$(TEST_CUSTOM_PROGS): $(OUTPUT)/%: %.c
> +       $(CC) -o $@ -static $< -Wl,--build-id
>
>  # Order correspond to 'make run_tests' order
>  TEST_GEN_PROGS = test_verifier test_tag test_maps test_lru_map test_lpm_map test_progs \
> --
> 2.17.1
>
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Anders Roxell June 7, 2018, 7:07 p.m. UTC | #2
On 7 June 2018 at 19:52, Y Song <ys114321@gmail.com> wrote:
> On Thu, Jun 7, 2018 at 3:57 AM, Anders Roxell <anders.roxell@linaro.org> wrote:
>> gcc complains that urandom_read gets built twice.
>>
>> gcc -o tools/testing/selftests/bpf/urandom_read
>> -static urandom_read.c -Wl,--build-id
>> gcc -Wall -O2 -I../../../include/uapi -I../../../lib -I../../../lib/bpf
>> -I../../../../include/generated  -I../../../include    urandom_read.c
>> urandom_read -lcap -lelf -lrt -lpthread -o
>> tools/testing/selftests/bpf/urandom_read
>> gcc: fatal error: input file
>> ‘tools/testing/selftests/bpf/urandom_read’ is the
>> same as output file
>> compilation terminated.
>> ../lib.mk:110: recipe for target
>> 'tools/testing/selftests/bpf/urandom_read' failed
>
> What is the build/make command to reproduce the above failure?

make -C tools/testing/selftests

Cheers,
Anders

>
>> To fix this issue remove the urandom_read target and so target
>> TEST_CUSTOM_PROGS gets used.
>>
>> Fixes: 81f77fd0deeb ("bpf: add selftest for stackmap with BPF_F_STACK_BUILD_ID")
>> Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
>> ---
>>  tools/testing/selftests/bpf/Makefile | 6 ++----
>>  1 file changed, 2 insertions(+), 4 deletions(-)
>>
>> diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
>> index 607ed8729c06..67285591ffd7 100644
>> --- a/tools/testing/selftests/bpf/Makefile
>> +++ b/tools/testing/selftests/bpf/Makefile
>> @@ -16,10 +16,8 @@ LDLIBS += -lcap -lelf -lrt -lpthread
>>  TEST_CUSTOM_PROGS = $(OUTPUT)/urandom_read
>>  all: $(TEST_CUSTOM_PROGS)
>>
>> -$(TEST_CUSTOM_PROGS): urandom_read
>> -
>> -urandom_read: urandom_read.c
>> -       $(CC) -o $(TEST_CUSTOM_PROGS) -static $< -Wl,--build-id
>> +$(TEST_CUSTOM_PROGS): $(OUTPUT)/%: %.c
>> +       $(CC) -o $@ -static $< -Wl,--build-id
>>
>>  # Order correspond to 'make run_tests' order
>>  TEST_GEN_PROGS = test_verifier test_tag test_maps test_lru_map test_lpm_map test_progs \
>> --
>> 2.17.1
>>
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Y Song June 7, 2018, 9:17 p.m. UTC | #3
On Thu, Jun 7, 2018 at 12:07 PM, Anders Roxell <anders.roxell@linaro.org> wrote:
> On 7 June 2018 at 19:52, Y Song <ys114321@gmail.com> wrote:
>> On Thu, Jun 7, 2018 at 3:57 AM, Anders Roxell <anders.roxell@linaro.org> wrote:
>>> gcc complains that urandom_read gets built twice.
>>>
>>> gcc -o tools/testing/selftests/bpf/urandom_read
>>> -static urandom_read.c -Wl,--build-id
>>> gcc -Wall -O2 -I../../../include/uapi -I../../../lib -I../../../lib/bpf
>>> -I../../../../include/generated  -I../../../include    urandom_read.c
>>> urandom_read -lcap -lelf -lrt -lpthread -o
>>> tools/testing/selftests/bpf/urandom_read
>>> gcc: fatal error: input file
>>> ‘tools/testing/selftests/bpf/urandom_read’ is the
>>> same as output file
>>> compilation terminated.
>>> ../lib.mk:110: recipe for target
>>> 'tools/testing/selftests/bpf/urandom_read' failed
>>
>> What is the build/make command to reproduce the above failure?
>
> make -C tools/testing/selftests

Thanks. The patch will break
   make -C tools/testing/selftests/bpf

[yhs@localhost bpf-next]$ make -C tools/testing/selftests/bpf
make: Entering directory '/home/yhs/work/bpf-next/tools/testing/selftests/bpf'
gcc -o /urandom_read -static urandom_read.c -Wl,--build-id
/usr/bin/ld: cannot open output file /urandom_read: Permission denied
collect2: error: ld returned 1 exit status
make: *** [Makefile:20: /urandom_read] Error 1
make: Leaving directory '/home/yhs/work/bpf-next/tools/testing/selftests/bpf'
[yhs@localhost bpf-next]$

Could you still make the above command work?

>
> Cheers,
> Anders
>
>>
>>> To fix this issue remove the urandom_read target and so target
>>> TEST_CUSTOM_PROGS gets used.
>>>
>>> Fixes: 81f77fd0deeb ("bpf: add selftest for stackmap with BPF_F_STACK_BUILD_ID")
>>> Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
>>> ---
>>>  tools/testing/selftests/bpf/Makefile | 6 ++----
>>>  1 file changed, 2 insertions(+), 4 deletions(-)
>>>
>>> diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
>>> index 607ed8729c06..67285591ffd7 100644
>>> --- a/tools/testing/selftests/bpf/Makefile
>>> +++ b/tools/testing/selftests/bpf/Makefile
>>> @@ -16,10 +16,8 @@ LDLIBS += -lcap -lelf -lrt -lpthread
>>>  TEST_CUSTOM_PROGS = $(OUTPUT)/urandom_read
>>>  all: $(TEST_CUSTOM_PROGS)
>>>
>>> -$(TEST_CUSTOM_PROGS): urandom_read
>>> -
>>> -urandom_read: urandom_read.c
>>> -       $(CC) -o $(TEST_CUSTOM_PROGS) -static $< -Wl,--build-id
>>> +$(TEST_CUSTOM_PROGS): $(OUTPUT)/%: %.c
>>> +       $(CC) -o $@ -static $< -Wl,--build-id
>>>
>>>  # Order correspond to 'make run_tests' order
>>>  TEST_GEN_PROGS = test_verifier test_tag test_maps test_lru_map test_lpm_map test_progs \
>>> --
>>> 2.17.1
>>>
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Anders Roxell June 7, 2018, 9:43 p.m. UTC | #4
On 7 June 2018 at 23:17, Y Song <ys114321@gmail.com> wrote:
> On Thu, Jun 7, 2018 at 12:07 PM, Anders Roxell <anders.roxell@linaro.org> wrote:
>> On 7 June 2018 at 19:52, Y Song <ys114321@gmail.com> wrote:
>>> On Thu, Jun 7, 2018 at 3:57 AM, Anders Roxell <anders.roxell@linaro.org> wrote:
>>>> gcc complains that urandom_read gets built twice.
>>>>
>>>> gcc -o tools/testing/selftests/bpf/urandom_read
>>>> -static urandom_read.c -Wl,--build-id
>>>> gcc -Wall -O2 -I../../../include/uapi -I../../../lib -I../../../lib/bpf
>>>> -I../../../../include/generated  -I../../../include    urandom_read.c
>>>> urandom_read -lcap -lelf -lrt -lpthread -o
>>>> tools/testing/selftests/bpf/urandom_read
>>>> gcc: fatal error: input file
>>>> ‘tools/testing/selftests/bpf/urandom_read’ is the
>>>> same as output file
>>>> compilation terminated.
>>>> ../lib.mk:110: recipe for target
>>>> 'tools/testing/selftests/bpf/urandom_read' failed
>>>
>>> What is the build/make command to reproduce the above failure?
>>
>> make -C tools/testing/selftests
>
> Thanks. The patch will break
>    make -C tools/testing/selftests/bpf
>
> [yhs@localhost bpf-next]$ make -C tools/testing/selftests/bpf
> make: Entering directory '/home/yhs/work/bpf-next/tools/testing/selftests/bpf'
> gcc -o /urandom_read -static urandom_read.c -Wl,--build-id
> /usr/bin/ld: cannot open output file /urandom_read: Permission denied
> collect2: error: ld returned 1 exit status
> make: *** [Makefile:20: /urandom_read] Error 1
> make: Leaving directory '/home/yhs/work/bpf-next/tools/testing/selftests/bpf'
> [yhs@localhost bpf-next]$

urgh, I'm sorry, missed that.

>
> Could you still make the above command work?

$(TEST_CUSTOM_PROGS): $(OUTPUT)/%: %.c
        $(CC) -o $(TEST_CUSTOM_PROGS) -static $< -Wl,--build-id

That worked both with:
make -C tools/testing/selftests
and
make -C tools/testing/selftests/bpf

for me.

what do you think?

>
>>
>> Cheers,
>> Anders
>>
>>>
>>>> To fix this issue remove the urandom_read target and so target
>>>> TEST_CUSTOM_PROGS gets used.
>>>>
>>>> Fixes: 81f77fd0deeb ("bpf: add selftest for stackmap with BPF_F_STACK_BUILD_ID")
>>>> Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
>>>> ---
>>>>  tools/testing/selftests/bpf/Makefile | 6 ++----
>>>>  1 file changed, 2 insertions(+), 4 deletions(-)
>>>>
>>>> diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
>>>> index 607ed8729c06..67285591ffd7 100644
>>>> --- a/tools/testing/selftests/bpf/Makefile
>>>> +++ b/tools/testing/selftests/bpf/Makefile
>>>> @@ -16,10 +16,8 @@ LDLIBS += -lcap -lelf -lrt -lpthread
>>>>  TEST_CUSTOM_PROGS = $(OUTPUT)/urandom_read
>>>>  all: $(TEST_CUSTOM_PROGS)
>>>>
>>>> -$(TEST_CUSTOM_PROGS): urandom_read
>>>> -
>>>> -urandom_read: urandom_read.c
>>>> -       $(CC) -o $(TEST_CUSTOM_PROGS) -static $< -Wl,--build-id
>>>> +$(TEST_CUSTOM_PROGS): $(OUTPUT)/%: %.c
>>>> +       $(CC) -o $@ -static $< -Wl,--build-id
>>>>
>>>>  # Order correspond to 'make run_tests' order
>>>>  TEST_GEN_PROGS = test_verifier test_tag test_maps test_lru_map test_lpm_map test_progs \
>>>> --
>>>> 2.17.1
>>>>
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Y Song June 8, 2018, 5:08 a.m. UTC | #5
On Thu, Jun 7, 2018 at 2:43 PM, Anders Roxell <anders.roxell@linaro.org> wrote:
> On 7 June 2018 at 23:17, Y Song <ys114321@gmail.com> wrote:
>> On Thu, Jun 7, 2018 at 12:07 PM, Anders Roxell <anders.roxell@linaro.org> wrote:
>>> On 7 June 2018 at 19:52, Y Song <ys114321@gmail.com> wrote:
>>>> On Thu, Jun 7, 2018 at 3:57 AM, Anders Roxell <anders.roxell@linaro.org> wrote:
>>>>> gcc complains that urandom_read gets built twice.
>>>>>
>>>>> gcc -o tools/testing/selftests/bpf/urandom_read
>>>>> -static urandom_read.c -Wl,--build-id
>>>>> gcc -Wall -O2 -I../../../include/uapi -I../../../lib -I../../../lib/bpf
>>>>> -I../../../../include/generated  -I../../../include    urandom_read.c
>>>>> urandom_read -lcap -lelf -lrt -lpthread -o
>>>>> tools/testing/selftests/bpf/urandom_read
>>>>> gcc: fatal error: input file
>>>>> ‘tools/testing/selftests/bpf/urandom_read’ is the
>>>>> same as output file
>>>>> compilation terminated.
>>>>> ../lib.mk:110: recipe for target
>>>>> 'tools/testing/selftests/bpf/urandom_read' failed
>>>>
>>>> What is the build/make command to reproduce the above failure?
>>>
>>> make -C tools/testing/selftests
>>
>> Thanks. The patch will break
>>    make -C tools/testing/selftests/bpf
>>
>> [yhs@localhost bpf-next]$ make -C tools/testing/selftests/bpf
>> make: Entering directory '/home/yhs/work/bpf-next/tools/testing/selftests/bpf'
>> gcc -o /urandom_read -static urandom_read.c -Wl,--build-id
>> /usr/bin/ld: cannot open output file /urandom_read: Permission denied
>> collect2: error: ld returned 1 exit status
>> make: *** [Makefile:20: /urandom_read] Error 1
>> make: Leaving directory '/home/yhs/work/bpf-next/tools/testing/selftests/bpf'
>> [yhs@localhost bpf-next]$
>
> urgh, I'm sorry, missed that.
>
>>
>> Could you still make the above command work?
>
> $(TEST_CUSTOM_PROGS): $(OUTPUT)/%: %.c
>         $(CC) -o $(TEST_CUSTOM_PROGS) -static $< -Wl,--build-id
>
> That worked both with:
> make -C tools/testing/selftests
> and
> make -C tools/testing/selftests/bpf
>
> for me.
>
> what do you think?

This indeed works. You can submit a revised patch and add my Ack.
Acked-by: Yonghong Song <yhs@fb.com>
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Anders Roxell June 8, 2018, 6:45 a.m. UTC | #6
On 8 June 2018 at 07:08, Y Song <ys114321@gmail.com> wrote:
> On Thu, Jun 7, 2018 at 2:43 PM, Anders Roxell <anders.roxell@linaro.org> wrote:
>> On 7 June 2018 at 23:17, Y Song <ys114321@gmail.com> wrote:
>>> On Thu, Jun 7, 2018 at 12:07 PM, Anders Roxell <anders.roxell@linaro.org> wrote:
>>>> On 7 June 2018 at 19:52, Y Song <ys114321@gmail.com> wrote:
>>>>> On Thu, Jun 7, 2018 at 3:57 AM, Anders Roxell <anders.roxell@linaro.org> wrote:
>>>>>> gcc complains that urandom_read gets built twice.
>>>>>>
>>>>>> gcc -o tools/testing/selftests/bpf/urandom_read
>>>>>> -static urandom_read.c -Wl,--build-id
>>>>>> gcc -Wall -O2 -I../../../include/uapi -I../../../lib -I../../../lib/bpf
>>>>>> -I../../../../include/generated  -I../../../include    urandom_read.c
>>>>>> urandom_read -lcap -lelf -lrt -lpthread -o
>>>>>> tools/testing/selftests/bpf/urandom_read
>>>>>> gcc: fatal error: input file
>>>>>> ‘tools/testing/selftests/bpf/urandom_read’ is the
>>>>>> same as output file
>>>>>> compilation terminated.
>>>>>> ../lib.mk:110: recipe for target
>>>>>> 'tools/testing/selftests/bpf/urandom_read' failed
>>>>>
>>>>> What is the build/make command to reproduce the above failure?
>>>>
>>>> make -C tools/testing/selftests
>>>
>>> Thanks. The patch will break
>>>    make -C tools/testing/selftests/bpf
>>>
>>> [yhs@localhost bpf-next]$ make -C tools/testing/selftests/bpf
>>> make: Entering directory '/home/yhs/work/bpf-next/tools/testing/selftests/bpf'
>>> gcc -o /urandom_read -static urandom_read.c -Wl,--build-id
>>> /usr/bin/ld: cannot open output file /urandom_read: Permission denied
>>> collect2: error: ld returned 1 exit status
>>> make: *** [Makefile:20: /urandom_read] Error 1
>>> make: Leaving directory '/home/yhs/work/bpf-next/tools/testing/selftests/bpf'
>>> [yhs@localhost bpf-next]$
>>
>> urgh, I'm sorry, missed that.
>>
>>>
>>> Could you still make the above command work?
>>
>> $(TEST_CUSTOM_PROGS): $(OUTPUT)/%: %.c
>>         $(CC) -o $(TEST_CUSTOM_PROGS) -static $< -Wl,--build-id
>>
>> That worked both with:
>> make -C tools/testing/selftests
>> and
>> make -C tools/testing/selftests/bpf
>>
>> for me.
>>
>> what do you think?
>
> This indeed works. You can submit a revised patch and add my Ack.
> Acked-by: Yonghong Song <yhs@fb.com>

Thank you for your time reviewing this.
I will send that out shortly.


Cheers,
Anders
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Patch
diff mbox

diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
index 607ed8729c06..67285591ffd7 100644
--- a/tools/testing/selftests/bpf/Makefile
+++ b/tools/testing/selftests/bpf/Makefile
@@ -16,10 +16,8 @@  LDLIBS += -lcap -lelf -lrt -lpthread
 TEST_CUSTOM_PROGS = $(OUTPUT)/urandom_read
 all: $(TEST_CUSTOM_PROGS)
 
-$(TEST_CUSTOM_PROGS): urandom_read
-
-urandom_read: urandom_read.c
-	$(CC) -o $(TEST_CUSTOM_PROGS) -static $< -Wl,--build-id
+$(TEST_CUSTOM_PROGS): $(OUTPUT)/%: %.c
+	$(CC) -o $@ -static $< -Wl,--build-id
 
 # Order correspond to 'make run_tests' order
 TEST_GEN_PROGS = test_verifier test_tag test_maps test_lru_map test_lpm_map test_progs \