Configure issues

Hi,
I am in the process of re-building postgresql 7.4.1, and on running 
configure I get the following output, of interest to me is the error 
message about ant even though it is installed in /library/ant, so i 
don't know why it is complaining. Any ideas?:

% ./configure --with-perl --with-python --with-tcl --without-tk 
--with-java --with-openssl=/usr/local/ssl --without-readline 
--enable-debug
checking build system type... powerpc-apple-darwin7.2.0
checking host system type... powerpc-apple-darwin7.2.0
checking which template to use... darwin
checking whether to build with 64-bit integer date/time support... no
checking whether NLS is wanted... no
checking for default port number... 5432
checking for gcc... gcc
checking for C compiler default output... a.out
checking whether the C compiler works... yes
checking whether we are cross compiling... no
checking for suffix of executables...
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking how to turn off strict aliasing in gcc -no-cpp-precomp... 
-fno-strict-aliasing
configure: using CFLAGS=-O2 -fno-strict-aliasing -g
checking whether the C compiler still works... yes
checking how to run the C preprocessor... gcc -no-cpp-precomp -E
checking allow thread-safe client libraries... no
checking whether to build with Tcl... yes
checking whether to build with Tk... no
checking whether to build Perl modules... yes
checking whether to build Python modules... yes
checking whether to build Java/JDBC tools... yes
checking for jakarta-ant... no
checking for ant... no
checking for ant.sh... no
checking for ant.bat... no
checking whether  works... no
configure: error: ant does not work

Uzo