Does the cgroup C/C++ lib exist?

Question

I am currently trying to compile a project (DOMJudge) and the compilation fails on cgroup_init in -lcgroup. When I looked to the script I found that this installer was looking for the gcc lib cgroup called by the flag -lcgroup.

But I don't find any information about such a lib on Linux or other systems.

gcc -lcgroup test.c also returned error.

I have already tried to replace -lcgroup by -lcgroups.

The software which is supposed to be executed is this one

| #ifdef __cplusplus
| extern "C"
| #endif
| char cgroup_init ();
| int
| main ()
| {
| return cgroup_init ();
|   ;
|   return 0;
| }

So with the C and C++ standard, if you want to compile with a system library you use the -l<libname> flag.

A short search engine lookup for `cgroup_init` and a few links followed, led me here http://libcg.sourceforge.net/ — StoryTeller - Unslander Monica, Feb 26 '18 at 11:07
I think you need to be 100% sure about the language you're working in; since they have different libraries and headers — UKMonkey, Feb 26 '18 at 11:07

score 0 · Accepted Answer · answered Feb 26 '18 at 16:11

0

Simply follow the instructions.

The DOMJudge authors have already spent a considerable amount of time producing documentation that explains all this.

We can see libcgroup-dev included in the package installation command listed in the "Prerequisites" section.

answered Feb 26 '18 at 16:11

Lightness Races in Orbit

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You should join chat. – Hatted Rooster Feb 26 '18 at 16:19
@SombreroChicken: Why? – Lightness Races in Orbit Feb 26 '18 at 16:21
It reduces StackOverflow stress. – Hatted Rooster Feb 26 '18 at 16:22
@SombreroChicken: That's not how I remember it. – Lightness Races in Orbit Feb 26 '18 at 16:25
We got rid of Jon Skeet, don't worry. – Hatted Rooster Feb 26 '18 at 16:26
But in the instruction i see no where talking about how to generate the `configure` file from the github repository – Brighter side Feb 26 '18 at 16:44
@GuillaumeMILAN At first glance I can't see where it's stored either. You should ask the developers on their mailing list. – Lightness Races in Orbit Feb 26 '18 at 17:47
In fact the build for devel is explain in a link on the home page. Contribute to DOMJudge > appendix with developer information Thanks for help – Brighter side Mar 01 '18 at 10:00
these links are dead @LightnessRacesinOrbit – Ronak Dhoot Sep 27 '20 at 11:07

score 0 · Answer 2 · answered Feb 27 '18 at 00:30

Because the package name is libcgroup-dev does not mean it has to install a libcgroup.a or .so into /lib for referencing as -lcgroup. It could install a libfoo or libbar instead. By that sf.net link above (and this is guess as I don't use the lib), it looks more like the libcgroup package installs libcg for reference as -lcg, which is what the compile command should use, and -dev just includes the headers that assume that main package is installed.

Do a ls libcg* in /lib and /lib64 to see what actual name might be, I suggest.

Does the cgroup C/C++ lib exist?

2 Answers2