CONFIG_OLD_SIGSUSPEND3 (not configurable)
configname: CONFIG_OLD_SIGSUSPEND3
Linux Kernel Configuration
└─>General architecture-dependent options
└─>OLD_SIGSUSPEND3
In linux kernel since version 3.1 (release Date: 2011-10-24)
Even weirder antique ABI - three-argument sigsuspend(2)