[EMBOSS] How to Turn X11 off during Make?

[Mao, Jean (NIH/CIT)]

Hello all,

I am building emboss package on our linux cluster. Since it will be for
multiple batch run purpose, there is no need for us to include X11. I got
the following error during 'make install'. Can someone tell me which
programs use X11 and how to turn it off in them before running 'make
install'? Many thanks!!!
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make[2]: Entering directory `/usr/local/EMBOSS-3.0.0/emboss'
/bin/sh ../libtool --tag=CC --mode=link gcc  -O2   -o aaindexextract
aaindexextract.o ../nucleus/libnucleus.la ../ajax/libajaxg.la
../ajax/libajax.la ../plplot/libplplot.la -lX11  -lm 
gcc -O2 -o .libs/aaindexextract aaindexextract.o
../nucleus/.libs/libnucleus.so ../ajax/.libs/libajaxg.so
../ajax/.libs/libajax.so ../plplot/.libs/libplplot.so -lX11 -lm -Wl,--rpath
-Wl,/usr/local/EMBOSS-3.0.0/lib
/usr/bin/ld: cannot find -lX11
collect2: ld returned 1 exit status
make[2]: *** [aaindexextract] Error 1
make[2]: Leaving directory `/usr/local/EMBOSS-3.0.0/emboss'
make[1]: *** [install-recursive] Error 1
make[1]: Leaving directory `/usr/local/EMBOSS-3.0.0/emboss'
make: *** [install-recursive] Error 1
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Jean