LinuxLists.cc - linux-next: build failure after merge of the bpf-next tree

2020-09-08 03:09:44

Subject: linux-next: build failure after merge of the bpf-next tree

Hi all,

After merging the bpf-next tree, today's linux-next build (powerpcle perf)
failed like this:

util/bpf-loader.c: In function 'config_bpf_program':
util/bpf-loader.c:331:2: error: 'bpf_program__title' is deprecated: BPF program title is confusing term; please use bpf_program__section_name() instead [-Werror=deprecated-declarations]
331 | config_str = bpf_program__title(prog, false);
| ^~~~~~~~~~
In file included from util/bpf-loader.c:10:
tools/lib/bpf/libbpf.h:203:13: note: declared here
203 | const char *bpf_program__title(const struct bpf_program *prog, bool needs_copy);
| ^~~~~~~~~~~~~~~~~~
util/bpf-loader.c: In function 'preproc_gen_prologue':
util/bpf-loader.c:457:3: error: 'bpf_program__title' is deprecated: BPF program title is confusing term; please use bpf_program__section_name() instead [-Werror=deprecated-declarations]
457 | title = bpf_program__title(prog, false);
| ^~~~~
In file included from util/bpf-loader.c:10:
tools/lib/bpf/libbpf.h:203:13: note: declared here
203 | const char *bpf_program__title(const struct bpf_program *prog, bool needs_copy);
| ^~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors

Caused or exposed by commit

521095842027 ("libbpf: Deprecate notion of BPF program "title" in favor of "section name"")

I have used the bpf-next tree from next-20200903 for today.

--
Cheers,
Stephen Rothwell

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2020-09-08 17:55:44

by Andrii Nakryiko

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Subject: Re: linux-next: build failure after merge of the bpf-next tree

On 9/7/20 8:08 PM, Stephen Rothwell wrote:
> Hi all,
>
> After merging the bpf-next tree, today's linux-next build (powerpcle perf)
> failed like this:
>
> util/bpf-loader.c: In function 'config_bpf_program':
> util/bpf-loader.c:331:2: error: 'bpf_program__title' is deprecated: BPF program title is confusing term; please use bpf_program__section_name() instead [-Werror=deprecated-declarations]
> 331 | config_str = bpf_program__title(prog, false);
> | ^~~~~~~~~~
> In file included from util/bpf-loader.c:10:
> tools/lib/bpf/libbpf.h:203:13: note: declared here
> 203 | const char *bpf_program__title(const struct bpf_program *prog, bool needs_copy);
> | ^~~~~~~~~~~~~~~~~~
> util/bpf-loader.c: In function 'preproc_gen_prologue':
> util/bpf-loader.c:457:3: error: 'bpf_program__title' is deprecated: BPF program title is confusing term; please use bpf_program__section_name() instead [-Werror=deprecated-declarations]
> 457 | title = bpf_program__title(prog, false);
> | ^~~~~
> In file included from util/bpf-loader.c:10:
> tools/lib/bpf/libbpf.h:203:13: note: declared here
> 203 | const char *bpf_program__title(const struct bpf_program *prog, bool needs_copy);
> | ^~~~~~~~~~~~~~~~~~
> cc1: all warnings being treated as errors
>
> Caused or exposed by commit
>
> 521095842027 ("libbpf: Deprecate notion of BPF program "title" in favor of "section name"")
>
> I have used the bpf-next tree from next-20200903 for today.
>

perf code is using deprecated bpf_program__title() API. I'll send a
patch for bpf-next to replace it with bpf_program__section_name().
Thanks for letting me know about build warning!