generalize conditional compile for update_pmtu #9
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The following change generalizes the conditional compilation mechanism for the update_pmtu conditional compile. The extra argument was introduced in Linux 4.19.93 but common distributions such as Ubuntu 18.04.04 backported that change. This change to the makefile allows checks for specific kernel versions based on
uname
and also includes the check for numeric kernels >= 4.19.93.The module compiles and insmods on Ubuntu 18.04.4 but I don't know if it works because no regression testing method (yet).