ubuntu@ubuntu:~/secp256k1$ ./autogen.sh autom4te: cannot create autom4te.cache: No such file or directory aclocal: error: echo failed with exit status: 1 autoreconf: aclocal failed with exit status: 1
ubuntu@ubuntu:~/secp256k1$ ./autogen.sh autom4te: cannot create autom4te.cache: No such file or directory aclocal: error: echo failed with exit status: 1 autoreconf: aclocal failed with exit status: 1
It looks like you need install autoconf (and probably some other autotools).