* tools/bpf: build failed with defconfig(x86_64) on v5.6 and v5.7
@ 2020-06-24 6:45 Li Xinhai
2020-06-24 19:27 ` Andrii Nakryiko
0 siblings, 1 reply; 2+ messages in thread
From: Li Xinhai @ 2020-06-24 6:45 UTC (permalink / raw)
To: bpf; +Cc: linux-kernel
- information of machine
Linux localhost.localdomain 4.18.0-193.6.3.el8_2.x86_64 #1 SMP Wed Jun 10 11:09:32 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
- configurations
make defconfig
make kvmconfig
- failed logs on v5.6
```
LINK /mnt/build/1_build/05_build_v5.6/bpf/bpftool//libbpf/libbpf.a
LINK /mnt/build/1_build/05_build_v5.6/bpf/bpftool/bpftool
DESCEND runqslower
GEN /mnt/build/0_code/0_linux/linux/tools/bpf/runqslower/.output/bpf_helper_defs.h
make[4]: *** No rule to make target '/mnt/build/0_code/0_linux/linux/tools/include/linux/build_bug.h', needed by '/mnt/build/0_code/0_linux/linux/tools/bpf/runqslower/.output/staticobjs/libbpf.o'. Stop.
make[3]: *** [Makefile:183: /mnt/build/0_code/0_linux/linux/tools/bpf/runqslower/.output/staticobjs/libbpf-in.o] Error 2
make[2]: *** [Makefile:79: .output/libbpf.a] Error 2
make[1]: *** [Makefile:119: runqslower] Error 2
make: *** [Makefile:68: bpf] Error 2
```
- failed logs on v5.7
```
In file included from /mnt/build/0_code/0_linux/linux/tools/include/linux/build_bug.h:5,
from /mnt/build/0_code/0_linux/linux/tools/include/linux/kernel.h:8,
from /mnt/build/0_code/0_linux/linux/kernel/bpf/disasm.h:10,
from /mnt/build/0_code/0_linux/linux/kernel/bpf/disasm.c:8:
/mnt/build/0_code/0_linux/linux/kernel/bpf/disasm.c: In function ‘__func_get_name’:
/mnt/build/0_code/0_linux/linux/tools/include/linux/compiler.h:37:38: warning: nested extern declaration of ‘__compiletime_assert_0’ [-Wnested-externs]
_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
^~~~~~~~~~~~~~~~~~~~~
/mnt/build/0_code/0_linux/linux/tools/include/linux/compiler.h:16:15: note: in definition of macro ‘__compiletime_assert’
extern void prefix ## suffix(void) __compiletime_error(msg); \
^~~~~~
/mnt/build/0_code/0_linux/linux/tools/include/linux/compiler.h:37:2: note: in expansion of macro ‘_compiletime_assert’
_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
^~~~~~~~~~~~~~~~~~~
/mnt/build/0_code/0_linux/linux/tools/include/linux/build_bug.h:39:37: note: in expansion of macro ‘compiletime_assert’
#define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
^~~~~~~~~~~~~~~~~~
/mnt/build/0_code/0_linux/linux/tools/include/linux/build_bug.h:50:2: note: in expansion of macro ‘BUILD_BUG_ON_MSG’
BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
^~~~~~~~~~~~~~~~
/mnt/build/0_code/0_linux/linux/kernel/bpf/disasm.c:20:2: note: in expansion of macro ‘BUILD_BUG_ON’
BUILD_BUG_ON(ARRAY_SIZE(func_id_str) != __BPF_FUNC_MAX_ID);
^~~~~~~~~~~~
```
and
```
LINK /mnt/build/0_code/0_linux/linux/tools/bpf/runqslower/.output/libbpf.a
GEN vmlinux.h
BPF runqslower.bpf.o
In file included from runqslower.bpf.c:3:
.output/vmlinux.h:5:15: error: attribute 'preserve_access_index' is not supported by '#pragma clang attribute'
#pragma clang attribute push (__attribute__((preserve_access_index)), apply_to = record)
^
.output/vmlinux.h:98607:15: error: '#pragma clang attribute pop' with no matching '#pragma clang attribute push'
#pragma clang attribute pop
^
2 errors generated.
make[2]: *** [Makefile:57: .output/runqslower.bpf.o] Error 1
make[1]: *** [Makefile:119: runqslower] Error 2
make: *** [Makefile:68: bpf] Error 2
```
On this same machine and with same configuration, I've tried v5.4 and v5.5, no failures.
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: tools/bpf: build failed with defconfig(x86_64) on v5.6 and v5.7
2020-06-24 6:45 tools/bpf: build failed with defconfig(x86_64) on v5.6 and v5.7 Li Xinhai
@ 2020-06-24 19:27 ` Andrii Nakryiko
0 siblings, 0 replies; 2+ messages in thread
From: Andrii Nakryiko @ 2020-06-24 19:27 UTC (permalink / raw)
To: Li Xinhai; +Cc: bpf, linux-kernel
On Tue, Jun 23, 2020 at 11:46 PM Li Xinhai <lixinhai.lxh@gmail.com> wrote:
>
> - information of machine
> Linux localhost.localdomain 4.18.0-193.6.3.el8_2.x86_64 #1 SMP Wed Jun 10 11:09:32 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
>
> - configurations
> make defconfig
> make kvmconfig
>
> - failed logs on v5.6
> ```
> LINK /mnt/build/1_build/05_build_v5.6/bpf/bpftool//libbpf/libbpf.a
> LINK /mnt/build/1_build/05_build_v5.6/bpf/bpftool/bpftool
> DESCEND runqslower
> GEN /mnt/build/0_code/0_linux/linux/tools/bpf/runqslower/.output/bpf_helper_defs.h
> make[4]: *** No rule to make target '/mnt/build/0_code/0_linux/linux/tools/include/linux/build_bug.h', needed by '/mnt/build/0_code/0_linux/linux/tools/bpf/runqslower/.output/staticobjs/libbpf.o'. Stop.
> make[3]: *** [Makefile:183: /mnt/build/0_code/0_linux/linux/tools/bpf/runqslower/.output/staticobjs/libbpf-in.o] Error 2
> make[2]: *** [Makefile:79: .output/libbpf.a] Error 2
> make[1]: *** [Makefile:119: runqslower] Error 2
> make: *** [Makefile:68: bpf] Error 2
> ```
>
> - failed logs on v5.7
> ```
> In file included from /mnt/build/0_code/0_linux/linux/tools/include/linux/build_bug.h:5,
> from /mnt/build/0_code/0_linux/linux/tools/include/linux/kernel.h:8,
> from /mnt/build/0_code/0_linux/linux/kernel/bpf/disasm.h:10,
> from /mnt/build/0_code/0_linux/linux/kernel/bpf/disasm.c:8:
> /mnt/build/0_code/0_linux/linux/kernel/bpf/disasm.c: In function ‘__func_get_name’:
> /mnt/build/0_code/0_linux/linux/tools/include/linux/compiler.h:37:38: warning: nested extern declaration of ‘__compiletime_assert_0’ [-Wnested-externs]
> _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
> ^~~~~~~~~~~~~~~~~~~~~
> /mnt/build/0_code/0_linux/linux/tools/include/linux/compiler.h:16:15: note: in definition of macro ‘__compiletime_assert’
> extern void prefix ## suffix(void) __compiletime_error(msg); \
> ^~~~~~
> /mnt/build/0_code/0_linux/linux/tools/include/linux/compiler.h:37:2: note: in expansion of macro ‘_compiletime_assert’
> _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
> ^~~~~~~~~~~~~~~~~~~
> /mnt/build/0_code/0_linux/linux/tools/include/linux/build_bug.h:39:37: note: in expansion of macro ‘compiletime_assert’
> #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
> ^~~~~~~~~~~~~~~~~~
> /mnt/build/0_code/0_linux/linux/tools/include/linux/build_bug.h:50:2: note: in expansion of macro ‘BUILD_BUG_ON_MSG’
> BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
> ^~~~~~~~~~~~~~~~
> /mnt/build/0_code/0_linux/linux/kernel/bpf/disasm.c:20:2: note: in expansion of macro ‘BUILD_BUG_ON’
> BUILD_BUG_ON(ARRAY_SIZE(func_id_str) != __BPF_FUNC_MAX_ID);
> ^~~~~~~~~~~~
> ```
>
This one I've seen and I have no idea why this is happening (suddenly)
and how to fix that.
> and
> ```
> LINK /mnt/build/0_code/0_linux/linux/tools/bpf/runqslower/.output/libbpf.a
> GEN vmlinux.h
> BPF runqslower.bpf.o
> In file included from runqslower.bpf.c:3:
> .output/vmlinux.h:5:15: error: attribute 'preserve_access_index' is not supported by '#pragma clang attribute'
> #pragma clang attribute push (__attribute__((preserve_access_index)), apply_to = record)
> ^
> .output/vmlinux.h:98607:15: error: '#pragma clang attribute pop' with no matching '#pragma clang attribute push'
> #pragma clang attribute pop
> ^
> 2 errors generated.
> make[2]: *** [Makefile:57: .output/runqslower.bpf.o] Error 1
> make[1]: *** [Makefile:119: runqslower] Error 2
> make: *** [Makefile:68: bpf] Error 2
> ```
>
This just means you don't have recent-enough Clang on your system. You
need Clang 10 at least.
> On this same machine and with same configuration, I've tried v5.4 and v5.5, no failures.
>
>
^ permalink raw reply [flat|nested] 2+ messages in thread
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