Ok, I applied the patch, it works now, thank you a lot!
It was at least 7 years I was not applying a patch;)
So, I attach this for other people who may not be familiar
with the procedure.
=== Method to apply the patch ====
1) Get the TeXmacs source code
2) Get the patch where Philippe has shown, there you
will find the file: "pdf_hlink_patch.txt"
3) Move "pdf_hlink_patch.txt" into the TeXmacs source
directory, (as a check, the first files in there are: aclocal.m4, cmake, CMakeList.txt ...)
4) Run this command from the same directory in which you
put "pdf_hline_patch.txt".
$> patch -p0 < pdf_hlink_patch.txt
5) Compile texmacs :
$> configure
$> make
(become root)
$> make install
===============================
bye
Nicola
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