[vile] Build error, vile 9.5o on Linux

[Chris G]

My hosting provider is moving our shell accounts from a FreeBSD system
to a Linux system.

I can't get vile to build on the Linux system.  A default ./configure
and then make results in:-

    gcc -g -O2   -o vile-tags-filt tagsfilt.o filterio.o filters.o
    echo "#include <flt_defs.h>" > ada-filt.c
    : -t ada-filt.l >> ada-filt.c
    gcc -c -I. -I.. -I../filters -I.. -DHAVE_CONFIG_H  -D_GNU_SOURCE -g
    -O2  ada-filt.c
    rm -f ada-filt.c
    gcc -g -O2   -o vile-ada-filt ada-filt.o filterio.o filters.o 
    filterio.o: In function `flt_name':
    /home/isbd/build/vile-9.5/filters/filterio.c:111: undefined reference to 
`filter_def'
    filterio.o: In function `ProcessArgs':
    /home/isbd/build/vile-9.5/filters/filterio.c:67: undefined reference to 
`filter_def'
    filterio.o: In function `main':
    /home/isbd/build/vile-9.5/filters/filterio.c:317: undefined reference to 
`filter_def'
    /home/isbd/build/vile-9.5/filters/filterio.c:321: undefined reference to 
`filter_def'
    /home/isbd/build/vile-9.5/filters/filterio.c:327: undefined reference to 
`filter_def'
    filterio.o:/home/isbd/build/vile-9.5/filters/filterio.c:334: more undefined 
references to `filter_def' follow
    collect2: ld returned 1 exit status
    make[1]: *** [vile-ada-filt] Error 1
    make[1]: Leaving directory `/home6/isbd/build/vile-9.5/filters'
    make: *** [all] Error 2

Is there some vital library/headers missing?

-- 
Chris Green