Con make:
Fran@linux:~/Desktop/tcl8.5a1/unix> ./configure --enable-xft make
configure: WARNING: you should use --build, --host, --target
checking whether to use symlinks for manpages... no
checking compression for manpages... no
checking for make-gcc... no
checking for gcc... no
checking for make-cc... no
checking for cc... no
checking for cc... no
checking for make-cl... no
checking for cl... no
configure: error: no acceptable C compiler found in $PATH
See `config.log' for more details.