build(cmake): add prep/init.cmake (#2375)

Co-authored-by: James Le Cuirot <chewi@aura-online.co.uk>

CMakeLists.txt

@@ -29,6 +29,9 @@ include(${CMAKE_MODULE_PATH}/prep/build_version.cmake)
 # cmake build flags
 include(${CMAKE_MODULE_PATH}/prep/options.cmake)
 
+# initial prep
+include(${CMAKE_MODULE_PATH}/prep/init.cmake)
+
 # configure special package files, such as sunshine.desktop, Flatpak manifest, Portfile , etc.
 include(${CMAKE_MODULE_PATH}/prep/special_package_configuration.cmake)
 

cmake/compile_definitions/linux.cmake

@@ -8,10 +8,6 @@ if(${SUNSHINE_BUILD_APPIMAGE})
     string(REPLACE "${CMAKE_INSTALL_PREFIX}" ".${CMAKE_INSTALL_PREFIX}" SUNSHINE_ASSETS_DIR_DEF ${SUNSHINE_ASSETS_DIR})
 endif()
 
-if(NOT DEFINED SUNSHINE_EXECUTABLE_PATH)
-    set(SUNSHINE_EXECUTABLE_PATH "sunshine")
-endif()
-
 # cuda
 set(CUDA_FOUND OFF)
 if(${SUNSHINE_ENABLE_CUDA})

cmake/prep/init.cmake

@@ -0,0 +1,9 @@
+if (WIN32)
+elseif (APPLE)
+elseif (UNIX)
+    include(GNUInstallDirs)
+
+    if(NOT DEFINED SUNSHINE_EXECUTABLE_PATH)
+        set(SUNSHINE_EXECUTABLE_PATH "sunshine")
+    endif()
+endif ()

cmake/prep/special_package_configuration.cmake

@@ -6,8 +6,6 @@ if (APPLE)
         configure_file(packaging/macos/sunshine.rb sunshine.rb @ONLY)
     endif()
 elseif (UNIX)
-    include(GNUInstallDirs)  # this needs to be included prior to configuring the desktop files
-
     # configure the .desktop file
     if(${SUNSHINE_BUILD_APPIMAGE})
         configure_file(packaging/linux/AppImage/sunshine.desktop sunshine.desktop @ONLY)