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