From 420809b24ef7bb8510a13d9a4c02ac260a9841a7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Florian=20M=C3=A4rkl?= <info@florianmaerkl.de>
Date: Thu, 2 Jun 2022 17:10:19 +0200
Subject: [PATCH] Add option to fetch mbedtls with cmake

---
 CMakeLists.txt     | 12 ++++++++++++
 lib/CMakeLists.txt | 14 +++++++++-----
 2 files changed, 21 insertions(+), 5 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 611af18..e9cc357 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -24,6 +24,7 @@ endif()
 tri_option(CHIAKI_ENABLE_FFMPEG_DECODER "Enable FFMPEG video decoder" ${CHIAKI_FFMPEG_DEFAULT})
 tri_option(CHIAKI_ENABLE_PI_DECODER "Enable Raspberry Pi-specific video decoder (requires libraspberrypi0 and libraspberrypi-doc)" AUTO)
 option(CHIAKI_LIB_ENABLE_MBEDTLS "Use mbedtls instead of OpenSSL as part of Chiaki Lib" OFF)
+option(CHIAKI_LIB_MBEDTLS_EXTERNAL_PROJECT "Fetch Mbed TLS instead of using system-provided libs" OFF)
 option(CHIAKI_LIB_OPENSSL_EXTERNAL_PROJECT "Use OpenSSL as CMake external project" OFF)
 option(CHIAKI_GUI_ENABLE_SDL_GAMECONTROLLER "Use SDL Gamecontroller for Input" ON)
 option(CHIAKI_CLI_ARGP_STANDALONE "Search for standalone argp lib for CLI" OFF)
@@ -89,6 +90,17 @@ endif()
 
 if(CHIAKI_LIB_ENABLE_MBEDTLS)
 	add_definitions(-DCHIAKI_LIB_ENABLE_MBEDTLS)
+	if(CHIAKI_LIB_MBEDTLS_EXTERNAL_PROJECT)
+		include(FetchContent)
+		set(ENABLE_TESTING OFF)
+		set(USE_SHARED_MBEDTLS_LIBRARY OFF)
+		FetchContent_Declare(
+			mbedtls
+			GIT_REPOSITORY https://github.com/Mbed-TLS/mbedtls.git
+			GIT_TAG 8b3f26a5ac38d4fdccbc5c5366229f3e01dafcc0 # v2.28.0
+		)
+		FetchContent_MakeAvailable(mbedtls)
+	endif()
 endif()
 
 if(CHIAKI_ENABLE_FFMPEG_DECODER)
diff --git a/lib/CMakeLists.txt b/lib/CMakeLists.txt
index 3eb6e27..cbfd6b0 100644
--- a/lib/CMakeLists.txt
+++ b/lib/CMakeLists.txt
@@ -119,11 +119,15 @@ find_package(Threads REQUIRED)
 target_link_libraries(chiaki-lib Threads::Threads)
 
 if(CHIAKI_LIB_ENABLE_MBEDTLS)
-	# provided by mbedtls-static (mbedtls-devel)
-	find_library(MBEDTLS mbedtls)
-	find_library(MBEDX509 mbedx509)
-	find_library(MBEDCRYPTO mbedcrypto)
-	target_link_libraries(chiaki-lib ${MBEDTLS} ${MBEDX509} ${MBEDCRYPTO})
+	if(CHIAKI_LIB_MBEDTLS_EXTERNAL_PROJECT)
+		target_link_libraries(chiaki-lib mbedtls mbedx509 mbedcrypto)
+	else()
+		# provided by mbedtls-static (mbedtls-devel)
+		find_library(MBEDTLS mbedtls)
+		find_library(MBEDX509 mbedx509)
+		find_library(MBEDCRYPTO mbedcrypto)
+		target_link_libraries(chiaki-lib ${MBEDTLS} ${MBEDX509} ${MBEDCRYPTO})
+	endif()
 elseif(CHIAKI_LIB_OPENSSL_EXTERNAL_PROJECT)
 	target_link_libraries(chiaki-lib OpenSSL_Crypto)
 else()