The newest versions of the libs are the ones the install_tilp.sh script downloads
Please:
* purge all libticonv, libtifiles2, libticables2, libticalcs2, gfm and tilp packages from your package manager (because they're outdated);
* make sure you have modified the PKG_CONFIG_PATH and LD_LIBRARY_PATH environment variables as appropriate depending on the PREFIX you use (described within the script itself, as mentioned above);
* try again, and report back
If everything is configured properly and you have the build dependencies, you will get proper binaries: Ubuntu 10.04 has been reported multiple times to work

OK, the packages have been purged properly this time, and tilp doesn't run. So, now I get a different error: "files8x.c:36:20: error: ticonv.h: No such file or directory
files8x.c: In function ‘ti8x_file_read_regular’:
files8x.c:213: warning: implicit declaration of function ‘ticonv_varname_from_tifile_s’
files8x.c: In function ‘ti8x_file_write_regular’:
files8x.c:645: warning: implicit declaration of function ‘ticonv_varname_to_tifile_s’
files8x.c: In function ‘ti8x_content_display_regular’:
files8x.c:896: warning: implicit declaration of function ‘ticonv_varname_to_utf8_s’
make[2]: *** [libtifiles2_la-files8x.lo] Error 1
make[2]: Leaving directory `/media/Home/tim/lpg/tilp/libtifiles/src'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/media/Home/tim/lpg/tilp/libtifiles'
make: *** [all] Error 2"
I made a new log, at the same link as before.

Smitty: well, the script has been reported multiple times to work on Ubuntu 10.04
The key to the build script working, if you let the script's default of PREFIX being $HOME (i.e. per-user installation), is proper value of the PKG_CONFIG_PATH and LD_LIBRARY_PATH environment variables. In such a case, in your ~/.bashrc, you'll have to add the following lines such as
export LD_LIBRARY_PATH=$HOME/lib:$LD_LIBRARY_PATH
export PKG_CONFIG_PATH=$HOME/lib/pkgconfig:$PKG_CONFIG_PATH
and run `source ~/.bashrc`.

You can also modify the PREFIX to replace $HOME by /usr, in which case you will have to execute install_tilp.sh with sudo, and you won't have to modify LD_LIBRARY_PATH and PKG_CONFIG_PATH.

As usual, don't hesitate to report back