As described in https://www.phoronix.com/news/Linux-5.5-Kills-SYSCTL-SYSCALL, sys/sysctl.h has been deprecated for a while, as a result of which QPhiX and/or applications using it fail to build on some systems (such as on github's CI runners).
This seems to fix the issue in the sense that it requires sysconf to be available if sysctl is not. I'm not actually sure that either sys/types.h or sys/sysctl.h are required for using __rdtsc but I don't know so I wanted to make a minimal change which preserves the status quo of sys/sysctl.h is available.
Note that for testing reasons I had to include #121 in here as well.
As described in https://www.phoronix.com/news/Linux-5.5-Kills-SYSCTL-SYSCALL,
sys/sysctl.hhas been deprecated for a while, as a result of which QPhiX and/or applications using it fail to build on some systems (such as on github's CI runners).This seems to fix the issue in the sense that it requires
sysconfto be available ifsysctlis not. I'm not actually sure that eithersys/types.horsys/sysctl.hare required for using__rdtscbut I don't know so I wanted to make a minimal change which preserves the status quo ofsys/sysctl.his available.Note that for testing reasons I had to include #121 in here as well.