Re: [Powertop] [PATCH] Fix trying to use libnl-2.0 when only libnl-3.0 is installed

On Saturday 2012-05-12 22:54, Arjan van de Ven wrote:
>> 
>>     When using libnl-3.0 we need to link with libnl-genl also, if not, we
>>     get a lot of undefined symbols.
>>     ---
>>      has_libnl_ver=0
>>      PKG_CHECK_MODULES([LIBNL], [libnl-1], [has_libnl_ver=1], [
>>     -       AC_SEARCH_LIBS([nl_socket_alloc], [nl], [has_libnl_ver=2], [
>>     +       AC_SEARCH_LIBS([nl_socket_alloc], [libnl-2.0],
>>     [has_libnl_ver=2], [
>> 
>> are you sure you want the linker to check for -llibnl-2.0? that means
>> it's going to try to find a "liblibnl-2.0.so <http://liblibnl-2.0.so>"
>> (note the double "lib" here).
>
>this autoconf stuff is giving me a headache
>
>maybe we should ask the libnl guys if they have some snippet that they
>recommend.... after all I doubt we're the only ones dealing with their
>library.

libnl2 always has nl_socket_alloc, does it not? Why check for it?

(Why even bother with libnl1 and libnl2 anyway? They are obsolete.)