From 6572640089ba6bc81003fd2d4f924ee62a545ce1 Mon Sep 17 00:00:00 2001
From: Peter Matula <peter.matula@avast.com>
Date: Thu, 8 Dec 2022 09:51:53 +0100
Subject: [PATCH] deps/capstone: add RETDEC_USE_SYSTEM_CAPSTONE option

---
 cmake/options.cmake                           |  1 +
 deps/capstone/CMakeLists.txt                  | 45 +++++++++++++++++++
 .../retdec-system-capstone-config.cmake       |  4 ++
 3 files changed, 50 insertions(+)
 create mode 100644 deps/capstone/retdec-system-capstone-config.cmake

diff --git a/cmake/options.cmake b/cmake/options.cmake
index fe5a6cf4a..bb3d4fc17 100644
--- a/cmake/options.cmake
+++ b/cmake/options.cmake
@@ -6,6 +6,7 @@ option(RETDEC_TESTS "Build tests." OFF)
 option(RETDEC_DEV_TOOLS "Build dev tools." OFF)
 option(RETDEC_COMPILE_YARA "Compile YARA rules at installation." ON)
 option(RETDEC_MSVC_STATIC_RUNTIME "Use a multi-threaded statically-linked runtime library." OFF)
+option(RETDEC_USE_SYSTEM_CAPSTONE "Use Capstone installed in the system." OFF)
 
 # Component options.
 #
diff --git a/deps/capstone/CMakeLists.txt b/deps/capstone/CMakeLists.txt
index d19c45966..8823dc360 100644
--- a/deps/capstone/CMakeLists.txt
+++ b/deps/capstone/CMakeLists.txt
@@ -1,4 +1,49 @@
 
+if(RETDEC_USE_SYSTEM_CAPSTONE)
+	message(STATUS "Capstone: using system Capstone.")
+
+	include(FindPkgConfig)
+	pkg_check_modules(CAPSTONE REQUIRED capstone>=5.0)
+
+	add_library(capstone INTERFACE)
+	add_library(retdec::deps::capstone ALIAS capstone)
+
+	target_include_directories(capstone
+		SYSTEM INTERFACE
+			$<BUILD_INTERFACE:${CAPSTONE_INCLUDE_DIRS}>
+			$<INSTALL_INTERFACE:${CAPSTONE_INCLUDE_DIRS}>
+	)
+
+	target_link_libraries(capstone INTERFACE
+		$<BUILD_INTERFACE:${CAPSTONE_LINK_LIBRARIES}>
+		$<INSTALL_INTERFACE:${CAPSTONE_LINK_LIBRARIES}>
+	)
+
+	# Install targets.
+	install(TARGETS capstone
+		EXPORT capstone-targets
+	)
+
+	# Export targets.
+	install(EXPORT capstone-targets
+		FILE "retdec-capstone-targets.cmake"
+		NAMESPACE retdec::deps::
+		DESTINATION ${RETDEC_INSTALL_CMAKE_DIR}
+	)
+
+	# Install CMake files.
+	install(
+		FILES
+			"${CMAKE_CURRENT_LIST_DIR}/retdec-system-capstone-config.cmake"
+		DESTINATION
+			"${RETDEC_INSTALL_CMAKE_DIR}"
+		RENAME
+			"retdec-capstone-config.cmake"
+	)
+
+	return()
+endif()
+
 set(CAPSTONE_INSTALL_DIR ${CMAKE_BINARY_DIR}/deps/install/capstone)
 
 set(CAPSTONE_LIB_NAME  ${CMAKE_STATIC_LIBRARY_PREFIX}capstone${CMAKE_STATIC_LIBRARY_SUFFIX})
diff --git a/deps/capstone/retdec-system-capstone-config.cmake b/deps/capstone/retdec-system-capstone-config.cmake
new file mode 100644
index 000000000..f2de7fd5f
--- /dev/null
+++ b/deps/capstone/retdec-system-capstone-config.cmake
@@ -0,0 +1,4 @@
+
+if(NOT TARGET retdec::deps::capstone)
+    include(${CMAKE_CURRENT_LIST_DIR}/retdec-capstone-targets.cmake)
+endif()