You have to run ./autogen.sh first.
Again...i get errors...

michele@michele-desktop:~/Scrivania/build/amule$ ./autogen.sh
Setting up internationalization files.
./autogen.sh: 42: autopoint: not found
grep: po/Makefile.in.in: File o directory non esistente
autopoint does not honor dataroot variable, patching.
sed: impossibile leggere po/Makefile.in.in: File o directory non esistente
./autogen.sh: 51: cannot create intl/Makefile.in.tmp: Directory nonexistent
sed: impossibile leggere po/Makefile.in.in: File o directory non esistente
Running aclocal -I m4
Running autoheader
Running autoconf
Creating pixmaps Makefile.am
Running automake --foreign -a -c -f
configure.in:38: installing `./config.guess'
configure.in:38: installing `./config.sub'
configure.in:28: installing `./install-sh'
configure.in:28: installing `./missing'
src/Makefile.am: installing `./depcomp'
configure.in:388: required file `intl/Makefile.in' not found
Makefile.am:4: required directory ./intl does not exist
michele@michele-desktop:~/Scrivania/build/amule$