This is an example:
$ tar xJvf jsmin-0.0.1.tar.xz
$ cd jsmin-0.0.1
$ CC=/opt/toolchain/mipsel-BCM74X-linux-eglibc/1.0.8/bin/mipsel-bcm74x-linux-gnu-gcc \
./configure --prefix=/usr \
--target=mipsel-bcm74x-linux-gnu \
--host=mipsel-bcm74x-linux-gnu
$ make
$ make install [DESTDIR=dir]