On Sat, Mar 25, 2023 at 10:56 PM Sahil Ahmed <ahmedsahil1...@gmail.com> wrote: > Hi, > I m trying to build libcap on debian/hurd and the error said no <sys/prctl.h> > found.
Hello, I think the issue lies quite a bit deeper than <sys/prctl.h> not being present on a Debian/Hurd system ;) Namely, to my knowledge, Hurd doesn't implement POSIX capabilities, at all. Here's [0] a wiki page with some ideas about how they _could_ be implemented. [0]: https://www.gnu.org/software/hurd/community/gsoc/project_ideas/libcap/details.html > I searched around and found that each operating system has different > implementation and names for system calls. So I tried to read what prctl.h > provided and found out that it provided operations on threads or process. prctl is specific to Linux, you won't find a direct replacement on the Hurd or other systems. Debian GNU/Hurd still ships the Linux prctl(2) man page for some reason. > I looked at the hurd manual to look for the threads library which pointed to > libthreads. The Hurd is using pthread nowadays. There are a couple of Hurd- (or rather, HTL-) specific extensions to that in pthread-np.h; other than that, you can also look into using the lower-level Mach APIs for manipulating tasks and threads. > Am I missing something? Should I look into libhtreads and find a function > that is has a similar function and similar to prctl and replace it in the > libcap file? No, that won't help, because there are no POSIX capabilities on the Hurd. What do you want libcap for anyway? Sergey
