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libbpf: fix missing __WORDSIZE definition

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hashmap.h depends on __WORDSIZE being defined. It is defined by
glibc/musl in different headers. It's an explicit goal for musl to be
"non-detectable" at compilation time, so instead include glibc header if
glibc is explicitly detected and fall back to musl header otherwise.

Reported-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexei Starovoitov <ast@fb.com>
Cc: Andrii Nakryiko <andrii.nakryiko@gmail.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Fixes: e3b9242240 ("libbpf: add resizable non-thread safe internal hashmap")
Link: https://lkml.kernel.org/r/20190718173021.2418606-1-andriin@fb.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Andrii Nakryiko 2019-07-18 10:30:21 -07:00 committed by Arnaldo Carvalho de Melo
parent 2e9a06dda1
commit 8aa259b10a
1 changed files with 5 additions and 0 deletions
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5
tools/lib/bpf/hashmap.h
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@ -10,6 +10,11 @@
#include <stdbool.h>
#include <stddef.h>
#ifdef __GLIBC__
#include <bits/wordsize.h>
#else
#include <bits/reg.h>
#endif
#include "libbpf_internal.h"
static inline size_t hash_bits(size_t h, int bits)