CMake: Build system support for FreeBSD

CMakeLists.txt

@@ -2,6 +2,7 @@ cmake_minimum_required(VERSION 3.10)
 project(duckstation C CXX)
 
 message("CMake Version: ${CMAKE_VERSION}")
+message("CMake System Name: ${CMAKE_SYSTEM_NAME}")
 
 # Pull in modules.
 set(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/CMakeModules/")
@@ -11,6 +12,9 @@ if(${CMAKE_SYSTEM_NAME} STREQUAL "Linux")
   set(LINUX TRUE)
   set(SUPPORTS_X11 TRUE)
   set(SUPPORTS_WAYLAND TRUE)
+elseif(${CMAKE_SYSTEM_NAME} STREQUAL "FreeBSD")
+  set(FREEBSD TRUE)
+  set(SUPPORTS_X11 TRUE)
 endif()
 
 # Set minimum OS version for macOS. 10.14 should work.
@@ -34,10 +38,10 @@ endif()
 if(SUPPORTS_WAYLAND)
   option(USE_WAYLAND "Support Wayland window system" OFF)
 endif()
-if(LINUX OR ANDROID)
+if((LINUX OR FREEBSD) OR ANDROID)
   option(USE_EGL "Support EGL OpenGL context creation" ON)
 endif()
-if(LINUX AND NOT ANDROID)
+if((LINUX OR FREEBSD) AND NOT ANDROID)
   option(USE_DRMKMS "Support DRM/KMS OpenGL contexts" OFF)
   option(USE_FBDEV "Support FBDev OpenGL contexts" OFF)
   option(USE_EVDEV "Support EVDev controller interface" ON)

CMakeModules/FindLIBEVDEV.cmake

@@ -12,6 +12,7 @@ FIND_PATH(
     HINTS ${PC_LIBEVDEV_INCLUDEDIR} ${PC_LIBEVDEV_INCLUDE_DIRS}
     /usr/include
     /usr/local/include
+    /usr/local/include/libevdev-1.0
     ${LIBEVDEV_PATH_INCLUDES}
 )
 

dep/discord-rpc/CMakeLists.txt

@@ -25,7 +25,7 @@ elseif(APPLE)
     src/connection_unix.cpp
     src/discord_register_osx.m
   )
-elseif(CMAKE_SYSTEM_NAME STREQUAL Linux)
+elseif(LINUX OR FREEBSD)
   target_sources(discord-rpc PRIVATE
     src/connection_unix.cpp
     src/discord_register_linux.cpp

dep/vulkan-loader/CMakeLists.txt

@@ -28,6 +28,7 @@ target_link_libraries(vulkan-loader PRIVATE ${CMAKE_DL_LIBS})
 
 if(USE_X11)
   target_compile_definitions(vulkan-loader PUBLIC "VULKAN_USE_X11=1")
+  target_include_directories(vulkan-loader PUBLIC "${X11_INCLUDE_DIR}")
 endif()
 
 if(USE_WAYLAND)