From d704b27e81f481db3eea9f154d07fc3a64820970 Mon Sep 17 00:00:00 2001
From: Arne Welzel <arne.welzel@corelight.com>
Date: Fri, 23 Sep 2022 17:51:01 +0200
Subject: [PATCH] cmake: Exclude empty directories due to headers install

This followed some pointers from here and opted for explicit exclusion:

https://stackoverflow.com/questions/55451084/cmake-files-matching-pattern-copies-empty-directories

Fixes #2422
---
 src/CMakeLists.txt | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index b115055e08..8ab1d85a4b 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -584,6 +584,12 @@ install(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/
         PATTERN "3rdparty/*" EXCLUDE
         # The "zeek -> ." symlink isn't needed in the install-tree
         REGEX "^${escaped_path}$" EXCLUDE
+
+	# FILES_MATCHING creates empty directories:
+	# https://gitlab.kitware.com/cmake/cmake/-/issues/17122
+	# Exclude the ones that this affects explicitly.
+	PATTERN "script_opt/CPP/maint" EXCLUDE
+	PATTERN "fuzzers/corpora" EXCLUDE
 )
 
 install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/