1. configure.ac:83: error: m4_copy: won't overwrite defined macro: _AC_ARG_VAR_PRECIOUS
  2. acinclude.m4:48: GLIBCXX_CONFIGURE is expanded from...
  3. configure.ac:83: the top level
  4. autom4te: /home/bas/build/openwrt-xburst/staging_dir/host/bin/m4 failed with exit status: 1