/usr/src/xtables-addons-1.40/Mbuild is in xtables-addons-dkms 1.40-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 | # -*- Makefile -*-
obj-${build_ACCOUNT}     += ACCOUNT/
obj-${build_CHAOS}       += libxt_CHAOS.so
obj-${build_CHECKSUM}    += libxt_CHECKSUM.so
obj-${build_DELUDE}      += libxt_DELUDE.so
obj-${build_DHCPMAC}     += libxt_DHCPMAC.so libxt_dhcpmac.so
obj-${build_DNETMAP}     += libxt_DNETMAP.so
obj-${build_ECHO}        += libxt_ECHO.so
obj-${build_IPMARK}      += libxt_IPMARK.so
obj-${build_LOGMARK}     += libxt_LOGMARK.so
obj-${build_RAWNAT}      += libxt_RAWDNAT.so libxt_RAWSNAT.so
obj-${build_STEAL}       += libxt_STEAL.so
obj-${build_SYSRQ}       += libxt_SYSRQ.so
obj-${build_TARPIT}      += libxt_TARPIT.so
obj-${build_TEE}         += libxt_TEE.so
obj-${build_condition}   += libxt_condition.so
obj-${build_fuzzy}       += libxt_fuzzy.so
obj-${build_geoip}       += libxt_geoip.so
obj-${build_iface}       += libxt_iface.so
obj-${build_ipp2p}       += libxt_ipp2p.so
obj-${build_ipset6}      += ipset-6/
obj-${build_ipv4options} += libxt_ipv4options.so
obj-${build_length2}     += libxt_length2.so
obj-${build_lscan}       += libxt_lscan.so
obj-${build_pknock}      += pknock/
obj-${build_psd}         += libxt_psd.so
obj-${build_quota2}      += libxt_quota2.so
obj-${build_gradm}       += libxt_gradm.so
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