ところでudesc_dumpってFreeBSDで動きます？
4.6-STABLEですが、makeしても

%make
Warning: Object directory not changed from original /home/ogihara/tmp/udesc_dump-1.3.0
cc -O -pipe -I/home/ogihara/tmp/udesc_dump-1.3.0/include -ansi
-pedantic -W -Wall -Wbad-function-cast -Wcast-align -Wcast-qual
-Wchar-subscripts -Werror -Winline -Wmissing-prototypes
-Wnested-externs -Wpointer-arith -Wredundant-decls -Wshadow
-Wstrict-prototypes -Wwrite-strings -g -c main.c
cc1: warnings being treated as errors
In file included from main.c:33:
/usr/include/stdlib.h:108: warning: ANSI C does not support `long long'
/usr/include/stdlib.h:112: warning: ANSI C does not support `long long'
*** Error code 1

で通りませぬ。