UNIX for Dummies Questions & Answers

Hello Experts,
Recently I tried to install xdiff program in my Ubuntu7.10. I downloaded xdiff-ext-0.2.0 from Download xdiff-ext 0.2.0 for Linux - Compare files easily - Softpedia.
Then I untared the tar ball and did the following steps-
# cd xdiff-ext-0.2.0/
# ./configure
# make
# make check
# make install

But I got some errors which I've given below. I dont know how to solve it. Please help me.

root@ARINDAM:/home/arindam/Desktop/xdiff-ext-0.2.0# ./configure
.
. (some lines during configuring, a few given below)
.
checking if libtool supports shared libraries... yes
checking whether to build shared libraries... yes
checking whether to build static libraries... no
configure: creating libtool
appending configuration tag "CXX" to libtool
appending configuration tag "F77" to libtool
checking for gconftool-2... /usr/bin/gconftool-2
Using config source xml:merged:/etc/gconf/gconf.xml.defaults for schema installation
Using $(sysconfdir)/gconf/schemas as install directory for schema files
checking for pkg-config... /usr/bin/pkg-config
checking pkg-config is at least version 0.9.0... yes
checking for PREFERENCES... configure: error: Package requirements (thunar-vfs-1 >= 0.9 gtk+-2.0 >= 2.0.0) were not met:

No package 'thunar-vfs-1' found
No package 'gtk+-2.0' found

Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.

Alternatively, you may set the environment variables PREFERENCES_CFLAGS
and PREFERENCES_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.

root@ARINDAM:/home/arindam/Desktop/xdiff-ext-0.2.0# make
make: *** No targets specified and no makefile found. Stop.
root@ARINDAM:/home/arindam/Desktop/xdiff-ext-0.2.0# make check
make: *** No rule to make target `check'. Stop.
root@ARINDAM:/home/arindam/Desktop/xdiff-ext-0.2.0# make
make: *** No rule to make target `install'. Stop. install

Thanks in advance..

First, it's advisable to get the sources for an application from a trusted source (such as the authors site), which can usually be found via sites like freshmeat.net.

Second, did you check whether Ubuntu already has it in it's repository?

Third, if you have to install it from source, make sure that all dependencies are met. In your case, I'd guess that the development packages for thunar-vfs and gtk+2.0 are missing.