From db5402dc098374f49f72baa0534017a21bc03205 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Matthias=20Mail=C3=A4nder?=
 <Mailaender@users.noreply.github.com>
Date: Sun, 23 May 2021 12:16:14 +0200
Subject: [PATCH] build: Use system libraries if so desired. (#210)

Co-authored-by: WerWolv <werwolv98@gmail.com>
---
 CMakeLists.txt                  | 19 +++++++++++++++++--
 plugins/libimhex/CMakeLists.txt |  9 ++++++++-
 2 files changed, 25 insertions(+), 3 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 17f19813e..47314e306 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -25,13 +25,28 @@ findLibraries()
 detectOS()
 detectArch()
 
+if (NOT USE_SYSTEM_LLVM)
+    add_subdirectory(external/llvm)
+else()
+    find_package(LLVM REQUIRED Demangle)
+endif()
+if (NOT USE_SYSTEM_YARA)
+    add_subdirectory(external/yara)
+else()
+    find_package(yara REQUIRED)
+endif()
+
 # Add bundled dependencies
-add_subdirectory(external/llvm)
-add_subdirectory(external/yara)
 add_subdirectory(plugins/libimhex)
 
 # Add include directories
 include_directories(include ${MBEDTLS_INCLUDE_DIRS} ${CAPSTONE_INCLUDE_DIRS} ${MAGIC_INCLUDE_DIRS} ${Python_INCLUDE_DIRS})
+if (USE_SYSTEM_LLVM)
+    include_directories(include ${LLVM_INCLUDE_DIRS})
+endif()
+if (USE_SYSTEM_YARA)
+    include_directories(include ${YARA_INCLUDE_DIRS})
+endif()
 
 addVersionDefines()
 configurePackageCreation()
diff --git a/plugins/libimhex/CMakeLists.txt b/plugins/libimhex/CMakeLists.txt
index 64bc6db32..5e4018355 100644
--- a/plugins/libimhex/CMakeLists.txt
+++ b/plugins/libimhex/CMakeLists.txt
@@ -5,9 +5,16 @@ set(CMAKE_CXX_STANDARD 20)
 
 set(BUILD_SHARED_LIBS OFF)
 add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/../../external/ImGui ${CMAKE_CURRENT_BINARY_DIR}/external/ImGui)
-add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/../../external/nlohmann_json ${CMAKE_CURRENT_BINARY_DIR}/external/nlohmann_json)
+
+if(USE_SYSTEM_NLOHMANN_JSON)
+  find_package(nlohmann_json REQUIRED)
+else()
+  add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/../../external/nlohmann_json ${CMAKE_CURRENT_BINARY_DIR}/external/nlohmann_json)
+endif()
+
 add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/../../external/nativefiledialog ${CMAKE_CURRENT_BINARY_DIR}/external/nativefiledialog EXCLUDE_FROM_ALL)
 add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/../../external/fmt ${CMAKE_CURRENT_BINARY_DIR}/external/fmt)
+
 set(XDGPP_INCLUDE_DIRS "${CMAKE_CURRENT_SOURCE_DIR}/../../external/xdgpp")
 set(CMAKE_USE_MBEDTLS ON)
 set(BUILD_CURL_EXE OFF)