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configure: check for O_NOFOLLOW flag

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If the O_NOFOLLOW flag used by open() is not defined, try it with
_GNU_SOURCE. This is needed with glibc-2.11 and earlier.

Reported-by: Marius Rohde <marius.rohde@meinberg.de>
This commit is contained in:
Miroslav Lichvar 2021-02-16 13:54:42 +01:00
parent ae2e0318d1
commit f650b8c515
1 changed files with 14 additions and 0 deletions
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14
configure vendored
View file

@ -655,6 +655,20 @@ then
fi
fi
if ! test_code 'O_NOFOLLOW flag' 'sys/types.h sys/stat.h fcntl.h' '' "$LIBS" \
'return open("/dev/null", O_NOFOLLOW);'
then
if test_code 'O_NOFOLLOW flag with _GNU_SOURCE' 'sys/types.h sys/stat.h fcntl.h' \
'-D_GNU_SOURCE' "$LIBS" \
'return open("/dev/null", O_NOFOLLOW);'
then
add_def _GNU_SOURCE
else
echo "error: open() does not support O_NOFOLLOW flag"
exit 1
fi
fi
if [ $try_clock_gettime = "1" ]; then
if test_code 'clock_gettime()' 'time.h' '' '' \
'clock_gettime(CLOCK_REALTIME, NULL);'