Enable CMake "compile_commands.json" Output (#3854)

Co-authored-by: John Tramm <jtramm@gmail.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
Co-authored-by: Paul Romano <paul.k.romano@gmail.com>

Author: 4 people

CMakeLists.txt

@@ -20,6 +20,11 @@ set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
 set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
 
+# Generate compile_commands.json for clangd and other tools
+if("${CMAKE_EXPORT_COMPILE_COMMANDS}" STREQUAL "")
+  set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+endif()
+
 # Enable correct usage of CXX_EXTENSIONS
 if (CMAKE_VERSION VERSION_GREATER_EQUAL 3.22)
   cmake_policy(SET CMP0128 NEW)