[build][ios] Move iOS specific ccache scripts to platform directory

CMakeLists.txt

@@ -1,26 +1,6 @@
 cmake_minimum_required(VERSION 3.10 FATAL_ERROR)
 project("Mapbox GL Native" LANGUAGES CXX C)
 
-find_program(CCACHE_PROGRAM ccache)
-if(CCACHE_PROGRAM AND CMAKE_SYSTEM_NAME STREQUAL "iOS")
-    # Set up wrapper scripts
-    set(C_LAUNCHER "${CCACHE_PROGRAM}")
-    set(CXX_LAUNCHER "${CCACHE_PROGRAM}")
-    configure_file(${PROJECT_SOURCE_DIR}/scripts/ci/ccache-c.in ccache-c)
-    configure_file(${PROJECT_SOURCE_DIR}/scripts/ci/ccache-cxx.in ccache-cxx)
-    execute_process(
-        COMMAND
-            chmod
-            a+rx
-            "${CMAKE_BINARY_DIR}/ccache-c"
-            "${CMAKE_BINARY_DIR}/ccache-cxx"
-    )
-
-    # Set Xcode project attributes to route compilation and linking through our scripts
-    set(CMAKE_XCODE_ATTRIBUTE_CC "${CMAKE_BINARY_DIR}/ccache-c")
-    set(CMAKE_XCODE_ATTRIBUTE_CXX "${CMAKE_BINARY_DIR}/ccache-cxx")
-endif()
-
 set_property(GLOBAL PROPERTY USE_FOLDERS ON)
 set_property(GLOBAL PROPERTY PREDEFINED_TARGETS_FOLDER Core)
 

platform/ios/ccache.cmake

@@ -0,0 +1,27 @@
+find_program(CCACHE_PROGRAM ccache)
+if(CCACHE_PROGRAM)
+    # Set up wrapper scripts
+    set(C_LAUNCHER "${CCACHE_PROGRAM}")
+    set(CXX_LAUNCHER "${CCACHE_PROGRAM}")
+    configure_file(${PROJECT_SOURCE_DIR}/platform/ios/ccache-c.in ccache-c)
+    configure_file(${PROJECT_SOURCE_DIR}/platform/ios/ccache-cxx.in ccache-cxx)
+    execute_process(
+        COMMAND
+            chmod
+            a+rx
+            "${CMAKE_BINARY_DIR}/ccache-c"
+            "${CMAKE_BINARY_DIR}/ccache-cxx"
+    )
+
+    if(CMAKE_GENERATOR STREQUAL "Xcode")
+        # Set Xcode project attributes to route compilation and linking through our scripts
+        set(CMAKE_XCODE_ATTRIBUTE_CC "${CMAKE_BINARY_DIR}/ccache-c")
+        set(CMAKE_XCODE_ATTRIBUTE_CXX "${CMAKE_BINARY_DIR}/ccache-cxx")
+        set(CMAKE_XCODE_ATTRIBUTE_LD "${CMAKE_BINARY_DIR}/ccache-c")
+        set(CMAKE_XCODE_ATTRIBUTE_LDPLUSPLUS "${CMAKE_BINARY_DIR}/ccache-cxx")
+    else()
+        # Support Unix Makefiles and Ninja
+        set(CMAKE_C_COMPILER_LAUNCHER "${CMAKE_BINARY_DIR}/ccache-c")
+        set(CMAKE_CXX_COMPILER_LAUNCHER "${CMAKE_BINARY_DIR}/ccache-cxx")
+    endif()
+endif()

platform/ios/ios.cmake

@@ -76,6 +76,7 @@ target_include_directories(
 )
 
 include(${PROJECT_SOURCE_DIR}/vendor/icu.cmake)
+include(${PROJECT_SOURCE_DIR}/platform/ios/ccache.cmake)
 
 initialize_ios_target(mbgl-core)
 initialize_ios_target(mbgl-vendor-icu)