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| author | Yonghong Song <yhs@fb.com> | 2018-11-30 02:31:45 +0300 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2018-11-30 04:41:02 +0300 |
| commit | b42699547fc9fb1057795bccc21a6445743a7fde (patch) | |
| tree | 8389d04f1a6408da4c1f729618de4eff7c51dfdb /tools/lib/bpf/libbpf_errno.c | |
| parent | 1ad93ab10e24856ea1ae9f0fd3352992afa67e1b (diff) | |
| download | linux-b42699547fc9fb1057795bccc21a6445743a7fde.tar.xz | |
tools/bpf: make libbpf _GNU_SOURCE friendly
During porting libbpf to bcc, I got some warnings like below:
...
[ 2%] Building C object src/cc/CMakeFiles/bpf-shared.dir/libbpf/src/libbpf.c.o
/home/yhs/work/bcc2/src/cc/libbpf/src/libbpf.c:12:0:
warning: "_GNU_SOURCE" redefined [enabled by default]
#define _GNU_SOURCE
...
[ 3%] Building C object src/cc/CMakeFiles/bpf-shared.dir/libbpf/src/libbpf_errno.c.o
/home/yhs/work/bcc2/src/cc/libbpf/src/libbpf_errno.c: In function ‘libbpf_strerror’:
/home/yhs/work/bcc2/src/cc/libbpf/src/libbpf_errno.c:45:7:
warning: assignment makes integer from pointer without a cast [enabled by default]
ret = strerror_r(err, buf, size);
...
bcc is built with _GNU_SOURCE defined and this caused the above warning.
This patch intends to make libpf _GNU_SOURCE friendly by
. define _GNU_SOURCE in libbpf.c unless it is not defined
. undefine _GNU_SOURCE as non-gnu version of strerror_r is expected.
Signed-off-by: Yonghong Song <yhs@fb.com>
Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'tools/lib/bpf/libbpf_errno.c')
| -rw-r--r-- | tools/lib/bpf/libbpf_errno.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/lib/bpf/libbpf_errno.c b/tools/lib/bpf/libbpf_errno.c index d83b17f8435c..4343e40588c6 100644 --- a/tools/lib/bpf/libbpf_errno.c +++ b/tools/lib/bpf/libbpf_errno.c @@ -7,6 +7,7 @@ * Copyright (C) 2017 Nicira, Inc. */ +#undef _GNU_SOURCE #include <stdio.h> #include <string.h> |