Re: [PATCH bpf-next v5] selftests/bpf: trace_helpers.c: optimize kallsyms cache

[Rong Tao]

tools/testing/selftests/bpf/ compile OK, however, samples/bpf/ compile failed.

>> 	tools/testing/selftests/bpf/trace_helpers.c:17:10:
>> 	fatal error: libbpf_internal.h: No such file or directory
>> 	   17 | #include "libbpf_internal.h"
>> 	      |          ^~~~~~~~~~~~~~~~~~~
>>
>> 	tools/testing/selftests/bpf/trace_helpers.c:17:10:
>> 	fatal error: bpf/libbpf_internal.h: No such file or directory
>> 	   17 | #include "bpf/libbpf_internal.h"
>> 	      |           ^~~~~~~~~~~~~~~~~~~~~~~

I just submit v6 [0], which apply libbpf_ensure_mem() and

	TPROGS_CFLAGS += -I$(srctree)/tools/lib

to samples/bpf/Makefile, make sure, samples/bpf/Makefile could found
libbpf_internal.h.

Please review, thanks.

Rong Tao

[0] https://lore.kernel.org/lkml/tencent_4A09A36F883A06EA428A593497642AF8AF08@xxxxxx/