Add multi-architecture vmlinux.h support

[anakryiko]

Add support for per-architecture vmlinux.h headers. Add arm64 and powerpc vmlinux.h, generated by @vt-alt in #3252.

[vt-alt]

This builds successfully on aarch64, ppc64le, and x86_64. Except there is some compilation warning on powerpc:

[00:01:42] biopattern.c:139:4: warning: format specifies type 'long long' but the argument has type 'unsigned long' [-Wformat]
[00:01:42]                         counter.bytes / 1024);
[00:01:42]                         ^~~~~~~~~~~~~~~~~~~~

[00:01:42] drsnoop.c:119:9: warning: format specifies type 'long long' but the argument has type '__u64' (aka 'unsigned long') [-Wformat]
[00:01:42]                e->nr_reclaimed);
[00:01:42]                ^~~~~~~~~~~~~~~
[00:01:42] drsnoop.c:121:20: warning: format specifies type 'unsigned long long' but the argument has type 'unsigned long' [-Wformat]
[00:01:42]                 printf(" %8llu", e->nr_free_pages * page_size / 1024);
[00:01:42]                          ~~~~~   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[00:01:42]                          %8lu
[00:01:42] drsnoop.c:127:51: warning: format specifies type 'unsigned long long' but the argument has type '__u64' (aka 'unsigned long') [-Wformat]
[00:01:42]         fprintf(stderr, "lost %llu events on CPU #%d\n", lost_cnt, cpu);
[00:01:42]                               ~~~~                       ^~~~~~~~
[00:01:42]                               %lu

[00:01:42] numamove.c:109:4: warning: format specifies type 'long long' but the argument has type '__u64' (aka 'unsigned long') [-Wformat]
[00:01:42]                         __atomic_exchange_n(&obj->bss->num, 0,
[00:01:42]                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[00:01:42] numamove.c:111:4: warning: format specifies type 'long long' but the argument has type '__u64' (aka 'unsigned long') [-Wformat]
[00:01:42]                         __atomic_exchange_n(&obj->bss->latency, 0,
[00:01:42]                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

[00:01:42] llcstat.c:143:9: warning: format specifies type 'unsigned long long' but the argument has type '__u64' (aka 'unsigned long') [-Wformat]
[00:01:42]                         cpu, info.ref, info.miss, info.ref > 0 ?
[00:01:42]                              ^~~~~~~~
[00:01:42] llcstat.c:143:19: warning: format specifies type 'unsigned long long' but the argument has type '__u64' (aka 'unsigned long') [-Wformat]
[00:01:42]                         cpu, info.ref, info.miss, info.ref > 0 ?
[00:01:42]                                        ^~~~~~~~~
[00:01:42] llcstat.c:151:3: warning: format specifies type 'unsigned long long' but the argument has type '__u64' (aka 'unsigned long') [-Wformat]
[00:01:42]                 total_ref, total_miss, total_ref > 0 ?
[00:01:42]                 ^~~~~~~~~
[00:01:42] llcstat.c:151:14: warning: format specifies type 'unsigned long long' but the argument has type '__u64' (aka 'unsigned long') [-Wformat]
[00:01:42]                 total_ref, total_miss, total_ref > 0 ?
[00:01:42]                            ^~~~~~~~~~

[00:01:42] softirqs.c:150:45: warning: format specifies type 'unsigned long long' but the argument has type '__u64' (aka 'unsigned long') [-Wformat]
[00:01:42]                         printf("%-16s %11llu\n", vec_names[vec], count);
[00:01:42]                                       ~~~~~~                     ^~~~~
[00:01:42]                                       %11lu

etc.

Build log is temporary there: http://git.altlinux.org/tasks/265490/build/300/ppc64le/log

[anakryiko]

right, eternal long long vs long problem on different 64-bit architectures. We can fix that separately, it shouldn't affect correctness.

@yonghong-song, please consider pulling

[vt-alt]

Would be also great to remove libbpf-tools/bin/bpftool binary from the source. It's x86_64 specific blob.

[anakryiko]

Would be also great to remove libbpf-tools/bin/bpftool binary from the source. It's x86_64 specific blob.

Yes, it's necessary for BPF skeleton generation and it's here to make it simpler for users to compile libbpf-tools. We could instead do the same thing we did with vmlinux.h and provide per-architecture binaries, though.

[yonghong-song]

[buildbot, test this please]