The cache manager test is not working (test-cache-mngr.c) about libnl HOT 6 CLOSED

Ok I think I may have found the issue. It appears that the functions tagged with the __init specifier are not being invoked:

lib/route/addr.c
1129 static void __init addr_init(void)
1130 {
1131     nl_cache_mngt_register(&rtnl_addr_ops);
1132 }

from libnl.

Doesn't seem to matter what I do, I am not getting ant of these functions linked into my binary which means they are not getting executed on startup to setup the cache ops. How do I force this stuff to get linked in?

from libnl.

What is

$ test-cache-manager "route/addr"

? Is that something you wrote?

__init is defined as attribute((constructor)) (https://gcc.gnu.org/onlinedocs/gcc/Function-Attributes.html). This is a compiler specific extension. gcc and clang support that. Are you using another compiler?

from libnl.

test-cache-manager came from the tests directory in this repo (test-cache-mngr.c). Suppose I should have made that clearer. I figured out what the issue was. No symbols are referenced from lib/route/addr.c or route/link.c so as a result addr_init and link_init were not included and thus not invoked. Not sure if the intent of that test is to actually do anything useful though. I was trying to use it as a starting point for using the cache manager.

from libnl.

test-cache-mngr links dynamically to the libnl libraries:
$ libtool --mode=execute ldd ./tests/test-cache-mngr
so, I don't see any reason why addr_init() shouldn't be called.

How did you build test-cache-mngr? Usually you would just type make check.

the test functions are unfortunately not unit-test-like test programs that can always run and test something sensible (would be great to have, patches welcome). They are rather some hacked up snippets to demo something and to test it (manually) while implementing it.

Yeah, they should be better... but test-cache-mngr works as expected for me (including calling init_addr()).

from libnl.

I guess I am statically linking so that would explain why.

from libnl.