Originally Posted by mfduqued
I have the original version of the source (gnuplot-4.2.5.tar.gz). But at this folder is not file uninstall. I can't do make uninstall.
What can I do?
I install gnuplot by it's own 'make install' process
Since you have the original file do this - guaranteed to work (I think):
1.) tar -xvzf gnuplot-4.2.5.tar.gz
2.) cd into gnuplot-4.2.5/
5.) make uninstall (must be run as root)
That will build the original package for your system, then uninstall it.
This should give you a clean uninstall before building the new one.
FWIW - I use gnuplot myself and was still using v4.2.3 with Slackware 12.1 on my laptop.
I decided to upgrade to v4.4.0 so I removed the old package and first built your version and tried the 'make uninstall' method for removal - it will work.
Then I built 4.4.0 with a slackbuild and am now running it under 12.1...
So I hope you get yours going - I got an upgrade for my trouble - thanks!