Constant recompilation when GENERATE_COMPILATION_DATABASE is set

I typically use clangd with Git for the nice language server protocol (LSP) support. I noticed that when GENERATE_COMPILATION_DATABASE is set (which is used so clangd can find the proper flags), `make` rebuilds all of the files every time, even if I do it back to back. This persists even after a `git clean -dxf`.

Obviously, this is not great, since it means the turnaround time to compile changes is slower. Unfortunately, I'm not a huge expert in make and I'm unsure what the right solution is here. I'd appreciate anyone's thoughts on how to improve this.

This is on a Debian sid (unstable) amd64 system with the following configuration. The version of clang in use is Debian's 16.0.6.

---- NO_OPENSSL=1 DC_SHA1=1 NETTLE_SHA256=1 DEVELOPER=1 NO_SVN_TESTS=1 NO_PYTHON=1 USE_ASCIIDOCTOR=1 USE_ASCIIDOCTOR_MANPAGE=1 CC=clang GENERATE_COMPILATION_DATABASE=yes CSPRNG_METHOD=getrandom getentropy ----