configure проблема c --build, --host и --target

собираю expect-5.44.19 , дял него предварительно собрал в --prefix=$HOME tcl8.4.19 и tk8.4.19 :

vilfred@izabella:~/expect-5.44.1$ pwd
/u/vilfred/expect-5.44.1
vilfred@izabella:~/expect-5.44.1$ ./configure --with-tclconfig=/u/vilfred/tcl8.4.19/lib/ ./configure --with-tkconfig=/u/vilfred/tk8.4.19/unix/ --disable-FEATURE --prefix=/u/vilfred/expect-5.44.1

оно начинает собирать

configure: WARNING: you should use --build, --host, --target
configure: WARNING: invalid host type: ./configure
checking for correct TEA configuration... ok (TEA 3.2)
configuring expect 5.44.1
checking for autoconf... yes
checking for Tcl configuration... found /u/vilfred/tcl8.4.19/lib/tclConfig.sh
checking for existence of /u/vilfred/tcl8.4.19/lib/tclConfig.sh... loading
checking for Tk configuration... found /u/vilfred/tk8.4.19/unix/tkConfig.sh
checking for existence of /u/vilfred/tk8.4.19/unix/tkConfig.sh... loading
configure: --exec-prefix defaulting to TCL_EXEC_PREFIX /u/vilfred/tcl8.4.19
checking for ./configure-gcc... no
checking for gcc... gcc

... блаблабла ...

checking if running Sequent running SVR4... no
checking build system type... Invalid configuration `./configure': machine `./configure' not recognized
configure: error: /bin/sh tclconfig/config.sub ./configure failed
vilfred@izabella:~/expect-5.44.1$

и чего делать то? пути вроде верно прописал...