On Dec 6, 2014, at 11:44 PM, Loganaden Velvindron <lo...@elandsys.com> wrote:
> On Sat, Dec 06, 2014 at 11:41:51PM -0800, Guy Harris wrote:
>>
>> On Dec 6, 2014, at 9:19 PM, Loganaden Velvindron <lo...@elandsys.com> wrote:
>>
>>> Here's the config.log output:
>>>
>>> configure:4540: checking for cap_rights_init
>>> configure:4540: cc -o conftest -g -O2 conftest.c >&5
>>> /tmp/conftest-942ee0.o: In function `main':
>>> /root/tcpdump/tcpdump-4.6.2/conftest.c:66: undefined reference to
>>> `cap_rights_init'
>>> cc: error: linker command failed with exit code 1 (use -v to see invocation)
>>
>> So, in FreeBSD 10.1, is cap_rights_init() a function in libc, or is it a
>> macro that calls a function with a different name? The linker seems to be
>> indicating that it's not present in the standard library.
>
> According to the man page, it's part of the standard libc:
And the answer is B) it's a macro that calls a function with a different name;
from <sys/capsicum.h> in FreeBSD SVN:
#define cap_rights_init(...)
\
__cap_rights_init(CAP_RIGHTS_VERSION, __VA_ARGS__, 0ULL)
cap_rights_t *__cap_rights_init(int version, cap_rights_t *rights, ...);
The same is true of cap_rights_set, cap_rights_clear, and cap_rights_is_set, so
we can't check *any* of them with AC_CHECK_FUNCS.
The only one we're checking for is cap_rights_init, though, so removing that
from the list (with a comment explaining why we can't check for it) would
suffice.
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