[nzel-server:/]# cd /tmp/xrdp-0.4.1
[nzel-server:/tmp/xrdp-0.4.1]# make
make -C vnc
make[1]: Entering directory `/tmp/xrdp-0.4.1/vnc'
gcc -Wall -O2 -I../common -fPIC    -c -o vnc.o vnc.c
/usr/libexec/gcc/i486-slackware-linux/4.7.1/cc1: error while loading shared libr                                                                          aries: libmpfr.so.4: cannot open shared object file: No such file or directory
make[1]: *** [vnc.o] Error 1
make[1]: Leaving directory `/tmp/xrdp-0.4.1/vnc'
make: *** [base] Error 2