[root@XPsvr mrtg-2.9.25]# ./configure --prefix= /usr/local/mrtg-2
configure: WARNING: you should use --build, --host, --target
configure: WARNING: invalid host type: /usr/local/mrtg-2
checking for /usr/local/mrtg-2-gcc... no
checking for gcc... no
checking for /usr/local/mrtg-2-cc... no
checking for cc... no
checking for cc... no
checking for /usr/local/mrtg-2-cl... no
checking for cl... no
configure: error: no acceptable C compiler found in $PATH