export compile commands if top level (#1851)

Author: stephenberry

CMakeLists.txt

@@ -11,6 +11,10 @@ project(
 include(cmake/project-is-top-level.cmake)
 include(cmake/variables.cmake)
 
+if (PROJECT_IS_TOP_LEVEL)
+  set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+endif()
+
 add_library(glaze_glaze INTERFACE)
 add_library(glaze::glaze ALIAS glaze_glaze)