make srcdir=/home/vboxuser/Hyp/L4re/l4re_projects/fiasco/src objbase=/home/vboxuser/Hyp/L4re/l4re_projects/fiasco_builds/armv8r -f /home/vboxuser/Hyp/L4re/l4re_projects/fiasco/src/Makefile.sub1 
make[1]: Entering directory '/home/vboxuser/Hyp/L4re/l4re_projects/fiasco_builds/armv8r'
Checking compiler config... unchanged.
make[1]: Leaving directory '/home/vboxuser/Hyp/L4re/l4re_projects/fiasco_builds/armv8r'
make srcdir=/home/vboxuser/Hyp/L4re/l4re_projects/fiasco/src objbase=/home/vboxuser/Hyp/L4re/l4re_projects/fiasco_builds/armv8r -f /home/vboxuser/Hyp/L4re/l4re_projects/fiasco/src/Makefile.sub2 all
make[1]: Entering directory '/home/vboxuser/Hyp/L4re/l4re_projects/fiasco_builds/armv8r'
  ... Generating version information
  ... Making kip.o
In file included from /home/vboxuser/Hyp/L4re/l4re_projects/fiasco/src/abi/kip-debug.cpp:13,
                 from auto/kip.cc:4:
/home/vboxuser/Hyp/L4re/l4re_projects/fiasco/src/lib/libc/include/cstring:8:11: error: 'memccpy' has not been declared in '::'
    8 |   using ::memccpy;
      |           ^~~~~~~
make[1]: *** [/home/vboxuser/Hyp/L4re/l4re_projects/fiasco/src/Makerules.global:87: kip.o] Error 1
make[1]: Leaving directory '/home/vboxuser/Hyp/L4re/l4re_projects/fiasco_builds/armv8r'
make: *** [/home/vboxuser/Hyp/L4re/l4re_projects/fiasco/src/Makefile:174: all] Error 2