cmake: include directories of (generated) dependencies as SYSTEM

CMakeLists.txt

@@ -269,7 +269,7 @@ endif()
 
 if(CYGWIN)
   # We build SDL on cygwin without the UNIX emulation layer
-  target_include_directories(sdl-build-options INTERFACE "/usr/include/mingw")
+  target_include_directories(sdl-build-options SYSTEM INTERFACE "/usr/include/mingw")
   cmake_push_check_state()
   set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -mno-cygwin")
   check_c_source_compiles("int main(int argc, char **argv) { return 0; }"
@@ -297,7 +297,7 @@ if(USE_GCC OR (USE_CLANG AND NOT MSVC_CLANG))
     target_compile_options(sdl-global-options INTERFACE "SHELL:-idirafter \"${SDL3_SOURCE_DIR}/src/video/khronos\"")
   endif()
 else()
-  target_include_directories(sdl-global-options INTERFACE "${SDL3_SOURCE_DIR}/src/video/khronos")
+  target_include_directories(sdl-global-options SYSTEM INTERFACE "${SDL3_SOURCE_DIR}/src/video/khronos")
 endif()
 
 # All these ENABLED_BY_DEFAULT vars will default to ON if not specified, so
@@ -1494,7 +1494,7 @@ elseif(UNIX AND NOT APPLE AND NOT RISCOS AND NOT HAIKU)
         pkg_search_module(DBUS dbus-1 dbus)
         if(DBUS_FOUND)
           set(HAVE_DBUS_DBUS_H TRUE)
-          target_include_directories(sdl-build-options INTERFACE ${DBUS_INCLUDE_DIRS})
+          target_include_directories(sdl-build-options SYSTEM INTERFACE ${DBUS_INCLUDE_DIRS})
           # Fcitx need only dbus.
           set(HAVE_FCITX TRUE)
           set(HAVE_DBUS TRUE)
@@ -1506,7 +1506,7 @@ elseif(UNIX AND NOT APPLE AND NOT RISCOS AND NOT HAIKU)
         find_path(HAVE_SYS_INOTIFY_H NAMES sys/inotify.h)
         if(IBUS_FOUND AND HAVE_SYS_INOTIFY_H)
           set(HAVE_IBUS_IBUS_H TRUE)
-          target_include_directories(sdl-build-options INTERFACE ${IBUS_INCLUDE_DIRS})
+          target_include_directories(sdl-build-options SYSTEM INTERFACE ${IBUS_INCLUDE_DIRS})
           set(HAVE_IBUS TRUE)
         endif()
       endif()
@@ -1519,7 +1519,7 @@ elseif(UNIX AND NOT APPLE AND NOT RISCOS AND NOT HAIKU)
         pkg_search_module(INOTIFY libinotify)
         if(INOTIFY_FOUND)
           set(HAVE_INOTIFY 1)
-          target_include_directories(sdl-build-options INTERFACE ${INOTIFY_INCLUDE_DIRS})
+          target_include_directories(sdl-build-options SYSTEM INTERFACE ${INOTIFY_INCLUDE_DIRS})
           list(APPEND SDL_EXTRA_LIBS ${INOTIFY_LIBRARIES})
         endif()
       endif()
@@ -3092,7 +3092,7 @@ if(WARN_ABOUT_ARM_NEON_ASM_MIT)
 endif()
 
 if(ANDROID)
-  target_include_directories(sdl-build-options INTERFACE "${ANDROID_NDK}/sources/android/cpufeatures")
+  target_include_directories(sdl-build-options SYSTEM INTERFACE "${ANDROID_NDK}/sources/android/cpufeatures")
 endif()
 
 if(APPLE)

cmake/sdlchecks.cmake

@@ -137,7 +137,7 @@ macro(CheckPipewire)
             file(GLOB PIPEWIRE_SOURCES ${SDL3_SOURCE_DIR}/src/audio/pipewire/*.c)
             list(APPEND SOURCE_FILES ${PIPEWIRE_SOURCES})
             set(SDL_AUDIO_DRIVER_PIPEWIRE 1)
-            target_compile_options(sdl-build-options INTERFACE ${PKG_PIPEWIRE_CFLAGS})
+            target_include_directories(sdl-build-options SYSTEM INTERFACE ${PKG_PIPEWIRE_INCLUDE_DIRS})
             if(SDL_PIPEWIRE_SHARED AND NOT HAVE_SDL_LOADSO)
                 message_warn("You must have SDL_LoadObject() support for dynamic Pipewire loading")
             endif()
@@ -166,7 +166,7 @@ macro(CheckPulseAudio)
       file(GLOB PULSEAUDIO_SOURCES ${SDL3_SOURCE_DIR}/src/audio/pulseaudio/*.c)
       list(APPEND SOURCE_FILES ${PULSEAUDIO_SOURCES})
       set(SDL_AUDIO_DRIVER_PULSEAUDIO 1)
-      target_compile_options(sdl-build-options INTERFACE ${PKG_PULSEAUDIO_CFLAGS})
+      target_include_directories(sdl-build-options SYSTEM INTERFACE ${PKG_PULSEAUDIO_INCLUDE_DIRS})
       if(SDL_PULSEAUDIO_SHARED AND NOT HAVE_SDL_LOADSO)
         message_warn("You must have SDL_LoadObject() support for dynamic PulseAudio loading")
       endif()
@@ -195,7 +195,7 @@ macro(CheckJACK)
       file(GLOB JACK_SOURCES ${SDL3_SOURCE_DIR}/src/audio/jack/*.c)
       list(APPEND SOURCE_FILES ${JACK_SOURCES})
       set(SDL_AUDIO_DRIVER_JACK 1)
-      target_compile_options(sdl-build-options INTERFACE ${PKG_JACK_CFLAGS})
+      target_include_directories(sdl-build-options SYSTEM INTERFACE ${PKG_JACK_INCLUDE_DIRS})
       if(SDL_JACK_SHARED AND NOT HAVE_SDL_LOADSO)
         message_warn("You must have SDL_LoadObject() support for dynamic JACK audio loading")
       endif()
@@ -224,7 +224,7 @@ macro(CheckSNDIO)
       file(GLOB SNDIO_SOURCES ${SDL3_SOURCE_DIR}/src/audio/sndio/*.c)
       list(APPEND SOURCE_FILES ${SNDIO_SOURCES})
       set(SDL_AUDIO_DRIVER_SNDIO 1)
-      target_compile_options(sdl-build-options INTERFACE ${PKG_SNDIO_CFLAGS})
+      target_include_directories(sdl-build-options INTERFACE ${PKG_SNDIO_INCLUDE_DIRS})
       if(SDL_SNDIO_SHARED AND NOT HAVE_SDL_LOADSO)
         message_warn("You must have SDL_LoadObject() support for dynamic sndio loading")
       endif()
@@ -570,7 +570,7 @@ macro(CheckWayland)
 
       # We have to generate some protocol interface code for some unstable Wayland features.
       file(MAKE_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/wayland-generated-protocols")
-      target_include_directories(sdl-build-options INTERFACE "${CMAKE_CURRENT_BINARY_DIR}/wayland-generated-protocols")
+      target_include_directories(sdl-build-options SYSTEM INTERFACE "${CMAKE_CURRENT_BINARY_DIR}/wayland-generated-protocols")
 
       file(GLOB WAYLAND_PROTOCOLS_XML RELATIVE "${SDL3_SOURCE_DIR}/wayland-protocols/" "${SDL3_SOURCE_DIR}/wayland-protocols/*.xml")
       foreach(_XML ${WAYLAND_PROTOCOLS_XML})
@@ -606,7 +606,7 @@ macro(CheckWayland)
             set(HAVE_WAYLAND_LIBDECOR TRUE)
             set(HAVE_LIBDECOR_H 1)
             target_link_directories(sdl-build-options INTERFACE "${PKG_LIBDECOR_LIBRARY_DIRS}")
-            target_include_directories(sdl-build-options INTERFACE "${PKG_LIBDECOR_INCLUDE_DIRS}")
+            target_include_directories(sdl-build-options SYSTEM INTERFACE "${PKG_LIBDECOR_INCLUDE_DIRS}")
             if(SDL_WAYLAND_LIBDECOR_SHARED AND NOT HAVE_SDL_LOADSO)
                 message_warn("You must have SDL_LoadObject() support for dynamic libdecor loading")
             endif()
@@ -1050,7 +1050,7 @@ macro(CheckHIDAPI)
         check_include_file(libusb.h HAVE_LIBUSB_H ${PKG_LIBUSB_CFLAGS})
         if(HAVE_LIBUSB_H)
           set(HAVE_LIBUSB TRUE)
-          target_compile_options(sdl-build-options INTERFACE ${PKG_LIBUSB_CFLAGS})
+          target_include_directories(sdl-build-options SYSTEM INTERFACE ${PKG_LIBUSB_INCLUDE_DIRS})
           if(HIDAPI_ONLY_LIBUSB)
             list(APPEND SDL_EXTRA_LIBS ${PKG_LIBUSB_LIBRARIES})
           else()
@@ -1166,7 +1166,7 @@ macro(CheckKMSDRM)
       file(GLOB KMSDRM_SOURCES ${SDL3_SOURCE_DIR}/src/video/kmsdrm/*.c)
       list(APPEND SOURCE_FILES ${KMSDRM_SOURCES})
 
-      target_compile_options(sdl-build-options INTERFACE ${PKG_KMSDRM_CFLAGS})
+      target_include_directories(sdl-build-options SYSTEM INTERFACE ${PKG_KMSDRM_INCLUDE_DIRS})
 
       set(SDL_VIDEO_DRIVER_KMSDRM 1)