Re: [PATCH v2 bpf-next 0/4] libbpf: minimize feature detection (reallocarray, libelf-mmap)

On Tue, Aug 18, 2020 at 6:24 PM Andrii Nakryiko [off-list ref] wrote:

Get rid of two feature detectors: reallocarray and libelf-mmap. Optional
feature detections complicate libbpf Makefile and cause more troubles for
various applications that want to integrate libbpf as part of their build.

Patch #1 replaces all reallocarray() uses into libbpf-internal reallocarray()
implementation. Patches #2 and #3 makes sure we won't re-introduce
reallocarray() accidentally. Patch #2 also removes last use of
libbpf_internal.h header inside bpftool. There is still nlattr.h that's used
by both libbpf and bpftool, but that's left for a follow up patch to split.
Patch #4 removed libelf-mmap feature detector and all its uses, as it's
trivial to handle missing mmap support in libbpf, the way objtool has been
doing it for a while.

v1->v2:
  - rebase to latest bpf-next (Alexei).

still no good. pls rebase again.