Problem compiling with m4 1.4.5

[mickey at netfreaks.org]

hello list, dear tor developers,

i have problems compiling tor on fedora 6. it used to work just fine
with fedora 5 tho.

the build process stops with an error while autoconfiguring:

configure.in:8: usrbin/m4: Warning: sub-expression 1 not present
autom4te: usrbin/m4 failed with exit status: 1

i think i have tracked down the problems to m4 wich is version 1.4.5 in
fc6.

unfortunatly i dont have a clue about autoconf or how to fix this issue
myself so i kindly ask for your help.

best regards from germany,
mickey