Added compile_commands.json

[barakdiker123]

For using clangd we need the compile
database of compile_commands.json
I think It would be a nice addition for this repo

[wujiang]

Love the idea! But I think it's better to add that line in tools.cmake.

--- a/cmake/tools.cmake
+++ b/cmake/tools.cmake
@@ -6,6 +6,8 @@ if(NOT PROJECT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
   return()
 endif()

+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+
 include(${CMAKE_CURRENT_LIST_DIR}/CPM.cmake)

[TheLartians]

Thanks for the PR! I also enable CMAKE_EXPORT_COMPILE_COMMANDS when developing my projects, though usually set it as a command line option to not mess with project files as different users may have different requirements.

Maybe instead of setting the option in the base project files, add it to all/CmakeLists.txt as that subdirectory exists only for development purposes?