HELP : Error while building gnumach

Hi,
I am trying to build gnumach from git repo as per the instructions in
https://www.gnu.org/software/hurd/microkernel/mach/gnumach/building.html


But i am getting error while doing "configure"

CPP='gcc -m32 -E -x c -undef -ansi' CC='gcc -m32' LD='ld -melf_i386'
../configure --prefix= --host=i686-unknown-linux-gnu
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for i686-unknown-linux-gnu-strip... no
checking for strip... strip
checking for a thread-safe mkdir -p... /bin/mkdir -p
checking for gawk... no
checking for mawk... mawk
checking whether make sets $(MAKE)... yes
checking whether make supports nested variables... yes
checking whether make supports nested variables... (cached) yes
checking build system type... x86_64-unknown-linux-gnu
checking host system type... i686-unknown-linux-gnu
checking for gawk... (cached) mawk
checking for style of include used by make... GNU
checking for i686-unknown-linux-gnu-gcc... gcc -m32
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables...
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc -m32 accepts -g... yes
checking for gcc -m32 option to accept ISO C89... none needed
checking whether gcc -m32 understands -c and -o together... yes
checking dependency style of gcc -m32... gcc3
checking dependency style of gcc -m32... gcc3
checking for i686-unknown-linux-gnu-gcc... (cached) gcc -m32
checking whether we are using the GNU C compiler... (cached) yes
checking whether gcc -m32 accepts -g... (cached) yes
checking for gcc -m32 option to accept ISO C89... (cached) none needed
checking whether gcc -m32 understands -c and -o together... (cached) yes
checking dependency style of gcc -m32... (cached) gcc3
checking how to run the C preprocessor... gcc -m32 -E -x c -undef -ansi
checking for i686-unknown-linux-gnu-ranlib... no
checking for ranlib... ranlib
checking for i686-unknown-linux-gnu-ar... no
checking for ar... ar
checking for i686-unknown-linux-gnu-ld... ld -melf_i386
checking for i686-unknown-linux-gnu-nm... no
checking for nm... nm
checking for i686-unknown-linux-gnu-mig... no
checking for mig... no
configure: error: The MiG generator is required to build GNU Mach


But link says that after configure, we have to install headers & then
compile mig.

Please let me know what  i am doing wrong.

Thanks & Regards
Vibi