CFamily incremental analysis WITH incremental compilation

[mpaladin (Massimo Paladin)]

Hi @manuyavuz-pointr,

@manuyavuz-pointr

I wonder if it will ever be possible to do an incremental build during build-wrapper trigger, instead of a full clean build.

At the time being we don’t support incremental build.

@manuyavuz-pointr

I assume build-wrapper does not really need to observe actual compilation itself, but rather the compiler command that is triggered.

Correct, compiler commands with its environment.

@manuyavuz-pointr

If that’s the case, would a dry-run clean build which outputs all compiler commands but does not poke compiler itself work?

Unless your build generates some files needed to succeed the compilation a dry-run would make the job.

@manuyavuz-pointr

This question is a bit vague I know, and maybe asking too much details. But I want to understand what’s the actual limitation that requires a clean build, and what makes ccache work, even though it does not perform actual compilation, and only serves cached output of compiler command.

ccache is pretty good and somehow it makes incremental build support less of a priority for us. We are using ourself ccache plus incremental analysis to dogfood our analyzer.