gtk-doc is a library that helps extract code documentation. When you create a new project with Anjuta it asks if you wish to include gkt-doc. Unfortunately, on Debian stable there seems to be a bug because the autoconf configuration is looking for the wrong version of gtk-doc.
/home/levlaz/git/librefocus/configure: line 13072: syntax error near unexpected token `1.0' /home/levlaz/git/librefocus/configure: line 13072: `GTK_DOC_CHECK(1.0)'
On Debian stable, the version of GTK doc that comes with thegtk-doc-tools package is 1.21. In order to resolve this error you need to update configure.ac to use the newer version of gtk-doc as shown below:
GTK_DOC_CHECK([1.21])
Then you need to regenerate the entire project and everything should work as expected.