Autotools errors - debian 10

[elvisef]

Hello. I've made a "autoscan" a this is what happened:

configure.ac: warning: missing AC_CHECK_HEADERS([string.h]) wanted by: plugins/map/eom-map-plugin.c:17

How to fix it ? I am using Debian 10, with automake 1.16.x.

How to compile these plugins correctly, step by step ? I was using autoscan, but earlier I used autoconf but it said that it can't read "AM_INIT_AUTOMAKE" properly, because of "1.9". Maybe something is missing or a new version of autotools is present ?

I've tried to fix it myself but couldn't. A version of plugins I am using is 1.16, directly from the GITHUB.