Hi, Using autoconf 2.69c (upgrading from 2.69b meant we could drop two patches, so that's good news!) to build gmp fails in a rather mysterious way: | autoreconf: export WARNINGS=cross | autoreconf: Entering directory '.' | autoreconf: configure.ac: not using Gettext | autoreconf: running: aclocal --system-acdir=/home/ross/Yocto/build/tmp/work/aarch64-linux/gmp-native/6.2.0-r0/recipe-sysroot-native/usr/share/aclocal/ --automake-acdir=/home/ross/Yocto/build/tmp/work/aarch64-linux/gmp-native/6.2.0-r0/recipe-sysroot-native/usr/share/aclocal-1.16 --force | m4:configure.ac:40: Warning: excess arguments to builtin `m4_define' ignored | autom4te: error: m4 failed with exit status: 1 | aclocal: error: echo failed with exit status: 1 | autoreconf: error: aclocal failed with exit status: 1 Line 40 is: AC_INIT(GNU MP, GMP_VERSION, [gmp-bugs@xxxxxxxxxx, see https://gmplib.org/manual/Reporting-Bugs.html], gmp) Has anyone seen this, or similar, before? Ross