build: include GNUInstallDirs module

Co-authored-by: Lorenzo Fontana <lo@linux.com>
Signed-off-by: Leonardo Di Donato <leodidonato@gmail.com>

CMakeLists.txt

@@ -15,24 +15,24 @@ cmake_minimum_required(VERSION 3.5.1)
 project(falco)
 
 option(USE_BUNDLED_DEPS "Bundle hard to find dependencies into the Falco binary" OFF)
+option(BUILD_WARNINGS_AS_ERRORS "Enable building with -Wextra -Werror flags" OFF)
+option(USE_BUNDLED_DEPS "Enable bundled dependencies instead of using the system ones" OFF)
 
+# Make flag for parallel processing
 include(ProcessorCount)
 processorcount(PROCESSOR_COUNT)
 if(NOT PROCESSOR_COUNT EQUAL 0)
   set(PROCESSOUR_COUNT_MAKE_FLAG -j${PROCESSOR_COUNT})
 endif()
 
-# if(NOT SYSDIG_DIR) get_filename_component(SYSDIG_DIR "${PROJECT_SOURCE_DIR}/../sysdig" REALPATH) endif()
-
 # Custom CMake modules
 list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules")
-list(APPEND CMAKE_MODULE_PATH "${SYSDIG_DIR}/cmake/modules")
 
-option(BUILD_WARNINGS_AS_ERRORS "Enable building with -Wextra -Werror flags")
+# GNU standard installation directories' definitions
-option(USE_BUNDLED_DEPS "Enable bundled dependencies instead of using the system ones" OFF)
+include(GNUInstallDirs)
 
 if(NOT DEFINED FALCO_ETC_DIR)
-  set(FALCO_ETC_DIR "/etc/falco")
+  set(FALCO_ETC_DIR "${CMAKE_INSTALL_FULL_SYSCONFDIR}/falco")
 endif()
 
 if(NOT DRAIOS_DEBUG_FLAGS)
@@ -65,7 +65,6 @@ set(CMAKE_CXX_FLAGS_DEBUG "${DRAIOS_DEBUG_FLAGS}")
 set(CMAKE_C_FLAGS_RELEASE "-O3 -fno-strict-aliasing -DNDEBUG")
 set(CMAKE_CXX_FLAGS_RELEASE "-O3 -fno-strict-aliasing -DNDEBUG")
 
-add_definitions(-DPLATFORM_NAME="${CMAKE_SYSTEM_NAME}")
 add_definitions(-DK8S_DISABLE_THREAD)
 if(CMAKE_SYSTEM_NAME MATCHES "Linux")
   add_definitions(-DHAS_CAPTURE)

rules/CMakeLists.txt

@@ -1,21 +1,21 @@
 #
 # Copyright (C) 2019 The Falco Authors.
 #
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
 #
-# Licensed under the Apache License, Version 2.0 (the "License");
+# http://www.apache.org/licenses/LICENSE-2.0
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
 #
-#     http://www.apache.org/licenses/LICENSE-2.0
+# Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an
-#
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
-# Unless required by applicable law or agreed to in writing, software
+# specific language governing permissions and limitations under the License.
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
 #
+
+# GNU standard installation directories' definitions
+include(GNUInstallDirs)
+
 if(NOT DEFINED FALCO_ETC_DIR)
-  set(FALCO_ETC_DIR "/etc/falco")
+  set(FALCO_ETC_DIR "${CMAKE_INSTALL_FULL_SYSCONFDIR}/falco")
 endif()
 
 if(NOT DEFINED FALCO_RULES_DEST_FILENAME)
@@ -26,35 +26,39 @@ if(NOT DEFINED FALCO_RULES_DEST_FILENAME)
 endif()
 
 if(DEFINED FALCO_COMPONENT)
-install(FILES falco_rules.yaml
+  install(
-        COMPONENT "${FALCO_COMPONENT}"
+    FILES falco_rules.yaml
-	DESTINATION "${FALCO_ETC_DIR}"
+    COMPONENT "${FALCO_COMPONENT}"
-	RENAME "${FALCO_RULES_DEST_FILENAME}")
+    DESTINATION "${FALCO_ETC_DIR}"
+    RENAME "${FALCO_RULES_DEST_FILENAME}")
 
-install(FILES falco_rules.local.yaml
+  install(
-        COMPONENT "${FALCO_COMPONENT}"
+    FILES falco_rules.local.yaml
-	DESTINATION "${FALCO_ETC_DIR}"
+    COMPONENT "${FALCO_COMPONENT}"
-	RENAME "${FALCO_LOCAL_RULES_DEST_FILENAME}")
+    DESTINATION "${FALCO_ETC_DIR}"
+    RENAME "${FALCO_LOCAL_RULES_DEST_FILENAME}")
 
-# Intentionally *not* installing application_rules.yaml. Not needed
+  # Intentionally *not* installing application_rules.yaml. Not needed when falco is embedded in other projects.
-# when falco is embedded in other projects.
 else()
-install(FILES falco_rules.yaml
+  install(
-	DESTINATION "${FALCO_ETC_DIR}"
+    FILES falco_rules.yaml
-	RENAME "${FALCO_RULES_DEST_FILENAME}")
+    DESTINATION "${FALCO_ETC_DIR}"
+    RENAME "${FALCO_RULES_DEST_FILENAME}")
 
-install(FILES falco_rules.local.yaml
+  install(
-	DESTINATION "${FALCO_ETC_DIR}"
+    FILES falco_rules.local.yaml
-	RENAME "${FALCO_LOCAL_RULES_DEST_FILENAME}")
+    DESTINATION "${FALCO_ETC_DIR}"
+    RENAME "${FALCO_LOCAL_RULES_DEST_FILENAME}")
 
-install(FILES k8s_audit_rules.yaml
+  install(
-	DESTINATION "${FALCO_ETC_DIR}"
+    FILES k8s_audit_rules.yaml
-	RENAME "${FALCO_K8S_AUDIT_RULES_DEST_FILENAME}")
+    DESTINATION "${FALCO_ETC_DIR}"
+    RENAME "${FALCO_K8S_AUDIT_RULES_DEST_FILENAME}")
 
-install(FILES application_rules.yaml
+  install(
-	DESTINATION "/etc/falco/rules.available"
+    FILES application_rules.yaml
-	RENAME "${FALCO_APP_RULES_DEST_FILENAME}")
+    DESTINATION "/etc/falco/rules.available"
+    RENAME "${FALCO_APP_RULES_DEST_FILENAME}")
 
-install(DIRECTORY DESTINATION "/etc/falco/rules.d")
+  install(DIRECTORY DESTINATION "/etc/falco/rules.d")
 endif()
-