From ad947f24f7de34a7d2f1007d6d31af96d61e7c7c Mon Sep 17 00:00:00 2001
From: Yuri Konotopov <ykonotopov@gnome.org>
Date: Wed, 25 Mar 2020 21:51:27 +0400
Subject: [PATCH] externals: reduce bundled dependencies

---
 CMakeLists.txt           | 12 ++++++++++++
 externals/CMakeLists.txt | 16 +++++++++++++++-
 src/tests/CMakeLists.txt |  7 ++++++-
 3 files changed, 33 insertions(+), 2 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 23bcff7e..b1d85f9d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -28,6 +28,8 @@ option(ENABLE_SCRIPTING "Enables scripting support" OFF)
 
 option(DISABLE_CLANG_TARGET "Disables the Clang format check" ON)
 
+option(DISABLE_BUNDLED_DEPENDENCIES "Disables bundled dependencies" OFF)
+
 if(NOT EXISTS ${CMAKE_SOURCE_DIR}/.git/hooks/pre-commit)
     message(STATUS "Copying pre-commit hook")
     file(COPY hooks/pre-commit
@@ -48,7 +50,9 @@ function(check_submodules_present)
         endif()
     endforeach()
 endfunction()
+if (NOT DISABLE_BUNDLED_DEPENDENCIES)
 check_submodules_present()
+endif ()
 
 configure_file(${CMAKE_SOURCE_DIR}/dist/compatibility_list/compatibility_list.qrc
                ${CMAKE_BINARY_DIR}/dist/compatibility_list/compatibility_list.qrc
@@ -392,6 +396,14 @@ git_branch_name(GIT_BRANCH)
 get_timestamp(BUILD_DATE)
 
 enable_testing()
+
+if (DISABLE_BUNDLED_DEPENDENCIES)
+	find_package(fmt 6.0 CONFIG REQUIRED)
+	message(STATUS "Using shared fmt ${fmt_VERSION}")
+
+	find_package(Catch2 REQUIRED)
+endif (DISABLE_BUNDLED_DEPENDENCIES)
+
 add_subdirectory(externals)
 add_subdirectory(src)
 add_subdirectory(dist/installer)
diff --git a/externals/CMakeLists.txt b/externals/CMakeLists.txt
index 4ea2b634..59470ef8 100644
--- a/externals/CMakeLists.txt
+++ b/externals/CMakeLists.txt
@@ -4,6 +4,8 @@ set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${PROJECT_SOURCE_DIR}/CMakeModules)
 include(DownloadExternals)
 include(ExternalProject)
 
+if (NOT DISABLE_BUNDLED_DEPENDENCIES)
+
 # Catch
 add_library(catch-single-include INTERFACE)
 target_include_directories(catch-single-include INTERFACE catch/single_include)
@@ -24,6 +26,8 @@ endif()
 add_subdirectory(fmt)
 add_library(fmt::fmt ALIAS fmt)
 
+endif (NOT DISABLE_BUNDLED_DEPENDENCIES)
+
 # getopt
 if (MSVC)
     add_subdirectory(getopt)
@@ -32,8 +36,10 @@ endif()
 # Glad
 add_subdirectory(glad)
 
+if (NOT DISABLE_BUNDLED_DEPENDENCIES)
 # inih
 add_subdirectory(inih)
+endif (NOT DISABLE_BUNDLED_DEPENDENCIES)
 
 # MicroProfile
 add_library(microprofile INTERFACE)
@@ -54,14 +60,22 @@ target_include_directories(SoundTouch INTERFACE ./soundtouch/include)
 # Xbyak
 if (ARCHITECTURE_x86_64)
     # Defined before "dynarmic" above
-    # add_library(xbyak INTERFACE)
+
+    if (NOT DISABLE_BUNDLED_DEPENDENCIES)
     target_include_directories(xbyak INTERFACE ./xbyak/xbyak)
+    else ()
+    add_library(xbyak INTERFACE)
+    target_include_directories(xbyak INTERFACE /usr/include/xbyak)
+    endif ()
     target_compile_definitions(xbyak INTERFACE XBYAK_NO_OP_NAMES)
 endif()
 
+
+if (NOT DISABLE_BUNDLED_DEPENDENCIES)
 # ENet
 add_subdirectory(enet)
 target_include_directories(enet INTERFACE ./enet/include)
+endif ()
 
 # Cubeb
 if (ENABLE_CUBEB)
diff --git a/src/tests/CMakeLists.txt b/src/tests/CMakeLists.txt
index f048714a..3fc9e1fe 100644
--- a/src/tests/CMakeLists.txt
+++ b/src/tests/CMakeLists.txt
@@ -21,6 +21,11 @@ endif()
 create_target_directory_groups(tests)
 
 target_link_libraries(tests PRIVATE common core video_core)
-target_link_libraries(tests PRIVATE ${PLATFORM_LIBRARIES} catch-single-include nihstro-headers Threads::Threads)
+if (NOT DISABLE_BUNDLED_DEPENDENCIES)
+set (CATCH_DEPENDENCY catch-single-include)
+else (NOT DISABLE_BUNDLED_DEPENDENCIES)
+set (CATCH_DEPENDENCY Catch2::Catch2)
+endif (NOT DISABLE_BUNDLED_DEPENDENCIES)
+target_link_libraries(tests PRIVATE ${PLATFORM_LIBRARIES} ${CATCH_DEPENDENCY} nihstro-headers Threads::Threads)
 
 add_test(NAME tests COMMAND tests)
-- 
2.24.1