Installing those files fixed the problem for me.

Do you have a patch? Care to contribute via Phabricator?

See: https://www.kdevelop.org/contribute-kdevelop

Oh, I don't think these two line changes worth a Phabrikator review:

diff --git a/debuggers/gdb/CMakeLists.txt b/debuggers/gdb/CMakeLists.txt
index 977354be9b..f330cd5137 100644
--- a/debuggers/gdb/CMakeLists.txt
+++ b/debuggers/gdb/CMakeLists.txt
@@ -1,5 +1,7 @@
 project(gdb)
 
+add_subdirectory(printers)
+
 find_package(OktetaGui)
 set_package_properties(OktetaGui PROPERTIES
     PURPOSE "Required for building MemoryViewer Widget."
diff --git a/debuggers/gdb/printers/CMakeLists.txt b/debuggers/gdb/printers/CMakeLists.txt
index 4a6e16122a..5a9ec11675 100644
--- a/debuggers/gdb/printers/CMakeLists.txt
+++ b/debuggers/gdb/printers/CMakeLists.txt
@@ -1,4 +1,4 @@
-add_subdirectory(tests)
+#add_subdirectory(tests)
 
 install( FILES helper.py qt.py kde.py gdbinit
     DESTINATION ${KDE_INSTALL_DATADIR}/kdevgdb/printers )

Git commit 12e590611af041516fccb82e02a9e150311b1b3b by Kevin Funk.
Committed on 27/04/2017 at 07:24.
Pushed by kfunk into branch 'master'.

gdb: Fixup: install GDB printers again

Accidentally disabled in c4dabb9d8c093e47e419ac9154623b36b9ba181a

Thanks Eugene for the patch!
FIXED-IN: 5.2.0

M  +1    -0    debuggers/gdb/CMakeLists.txt
M  +0    -2    debuggers/gdb/printers/CMakeLists.txt

https://commits.kde.org/kdevelop/12e590611af041516fccb82e02a9e150311b1b3b

Thanks!