HOSTCC  scripts/basic/fixdep
  HOSTCC  scripts/kconfig/conf.o
In file included from /usr/include/bits/posix1_lim.h:161,
                 from /usr/include/limits.h:183,
                 from /usr/lib64/gcc/x86_64-slackware-linux/9.3.0/include-fixed/limits.h:194,
                 from /usr/lib64/gcc/x86_64-slackware-linux/9.3.0/include-fixed/syslimits.h:7,
                 from /usr/lib64/gcc/x86_64-slackware-linux/9.3.0/include-fixed/limits.h:34,
                 from scripts/kconfig/conf.c:7:
/usr/include/bits/local_lim.h:38:10: fatal error: linux/limits.h: No such file or directory
   38 | #include <linux/limits.h>
      |          ^~~~~~~~~~~~~~~~
compilation terminated.
make[1]: *** [scripts/Makefile.host:112: scripts/kconfig/conf.o] Error 1
make: *** [Makefile:606: oldconfig] Error 2