gtksourceviewmm-master on Slackware64-current

Hello guys,

I have been working on a text editor and I wanted to try out gtksourceviewmm-master branch from github. I was able to ;

Code:./autogen.shafter a couple of issues and then managed to generate the configure script and configured without any warnings and errors. After that I tried the;

Code:makebut in return I got;

Code:make[1]: *** No rule to make target 'buffer.cc', needed by 'buffer.lo'. Stop.I have;

Code:gtkmm4.0
gtksourceview-5installed and can compile and execute as expected. Now to test out gtksourceviewmm-master I need to get over the Code:make step as I mentioned.

Anybody have any suggestions ?