From 6eaa13cc02ccd5f1bfa448fbcff3a1d9af8ba90a Mon Sep 17 00:00:00 2001
From: Bernd Waibel <waebbl-gentoo@posteo.net>
Date: Wed, 14 Dec 2022 07:04:29 +0100
Subject: [PATCH] use system catch

Signed-off-by: Bernd Waibel <waebbl-gentoo@posteo.net>
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -474,7 +474,7 @@ enable_testing()
 include(CTest)
 
 if(ENABLE_UNIT_TESTS)
-  include(${CMAKE_CURRENT_LIST_DIR}/cmake/external_projects/catch.cmake)
+  find_package(Catch2 REQUIRED)
 endif(ENABLE_UNIT_TESTS)
 
 
--- a/tests/catch/CMakeLists.txt
+++ b/tests/catch/CMakeLists.txt
@@ -3,11 +3,15 @@ if(ENABLE_UNIT_TESTS)
 add_custom_target(unit_tests)
 
 # Build catch_main test object
-include_directories(${CATCH_INCLUDE_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/../../libsrc/include ${SPDLOG_INCLUDE_DIR})
+if(TARGET Catch2::Catch2)
+  get_target_property(CATCH_INCLUDE_DIR Catch2::Catch2 INTERFACE_INCLUDE_DIRECTORIES)
+  include_directories(${CATCH_INCLUDE_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/../../libsrc/include ${SPDLOG_INCLUDE_DIR})
+else()
+  message(SEND_ERROR "Catch header files couldn't be found.")
+endif()
 add_library(catch_main STATIC main.cpp)
 set_target_properties(catch_main PROPERTIES CXX_STANDARD 17)
 add_dependencies(unit_tests catch_main)
-add_dependencies(catch_main project_catch)
 
 # ensure the test targets are built before testing
 add_test(NAME unit_tests_built COMMAND ${CMAKE_COMMAND} --build . --target unit_tests --config ${CMAKE_BUILD_TYPE} WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/../.. )
-- 
2.38.1