At first it appeared to be empty, but clicking around where the text should be caused the appropriate actions to trigger. So instead it seems that the text and +/- icons are just not rendered or are rendered invisibly.

Gscope has traditionally been optimized for large code projects: Millions of lines, 10-100K files, very large single files. In this type of environment, rebuilding a cross reference whenever any source change is detected is a time-costly experience.

While not forgetting it's roots in large data sets, the default detect-and-notify behavior should be configurable to allow selective detect-and-update (as a configurable option).

Whenever any new file(s) are added to the source sub-tree during an active gscope session, that session instance does not pick up the new files. Even when a cref rebuild request is requested.

Work Around: Restart gscope.

Remove command line options below:

[Gscope 2, 3, 4] Remove  command line option  -c,  --compressOff 
[Gscope 2, 3, 4] Remove command line option -u, -- updateAll (already disabled)
[Gscope 2, 3, 5] Remove command line option -T,  --truncSymbols

Consider removing -r, --rcFile=file
Consider removing -I, --includeDir=path

Pull-down list of all editors. Editor chosen provides (editable, default ) editor-specific default template. Prior Setting is remembered and overrides default template.

I have tried sh autogen.sh for 2.16, 3.16, and the tip of master. They all fail with:

./configure: line 5198: syntax error near unexpected token `PACKAGE,'
./configure: line 5198: `PKG_CHECK_MODULES(PACKAGE, $pkg_modules)'

This is on Ubuntu 18.04 with autoconf (GNU Autoconf) 2.69. I am not an autotools ninja, but I am happy to provide more information.

asprintf() is a GNU extension. You should not blindly assume it to be present.

Navigate to Options-->Start-up Preferences (dialog)
Select: Source File Search (Tab)
The gtk_entry widget for "Include File Search Path" is much too small/limited.
Make it bigger:
- update glade2 config (gtk2: gscope2)
- update glade3 config (gtk3: gscope3)
- update calabash (or hard-coded config) (gtk4: gscope4)

Context not clear. Seems to occur more often when compressing/un-expanding nodes.

Example: "Include File Search Path" entry error:
a) Pop up dialog on entry leaves focus OR
b) Pop up dialog on dialog close button clicked

Search results display enhancements:

• Sort results by column
• Provide a display filter that only shows results with a sub-string match (per column?)

When a source file is open in a file view window and that source file is modified, the window needs to be refreshed with updated content when the changes are "updated" into gscope.

Current work-around: Close the associated file-view window, rebuild the database and re-open a new file-view window for the file of interest.

Suggested Solution: Since source line indexing is directly linked to the gscope cross-reference db status, add a content refresh test to every open file-view window whenever the db is updated.

Example (Missing termination char: prints a warning to stderr and exits gscope):

$ gscope -R

Warning: Configuration string [settings.includeDir] was truncated.
List syntax error: Inconsistent delimiter char: ':' != 'e'
Pattern name: 'Include Directory List'
Pattern value: ':/usr/include:/usr/include/gtk-4.0:/usr/include/pango-1.0:/usr/include/glib-2.0:/usr/lib/x86_64-linux-gnu/glib-2.0/include:/usr/include/gtksourceview-5:/usr/include/cairo:/usr/include/harfbuzz:/usr/include/gdk-pixbuf-2.0:/usr/lib/x86_64-linux-gnu/graphene'

While i was hunting for the missing file contents of gscope.c i found your repo.
I have my own fork of cscope: https://github.com/agvxov/csope.git
It's not quite as reformatted as yours, but I'm working on it. In the soon future I will add ctags support too.

I thought I would let you know, perhaps something will come of it...