[build] generate .xcconfig files with configure_file

We previously used incremental `file(WRITE ...)` commands that gradually recreated the file on every CMake invocation. This sometimes lead to Xcode parsing a partially written file, which in turn breaks building dependend targets. Instead, we're now using a templated configuration file, which ensure that the file is created in one go and hopefully reduces the race condition between CMake and Xcode's automatic project updating.

1 files changed, 6 insertions, 0 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 480c186057..a6ed681bde 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -110,3 +110,9 @@ endif()
 if(COMMAND mbgl_platform_node)
     include(cmake/node.cmake)
 endif()
+
+if(CMAKE_GENERATOR STREQUAL "Xcode")
+    write_xcconfig_target_properties(
+        mbgl-core
+    )
+endif()