Enable cross-directory ccache #1539
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Description of changes:
The current ccache setup is very limited in its ability to cache between directories due to the fact that the compiler-generated debug info and any
__FILE__macros cause builds to differ between directories, which is quite annoying if you are using ff-dev and would like to quicklyffprdown a PR and build it as you end up building from scratch. This PR adds the necessary compiler flags to make debug info and__FILE__macros use relative paths, and then adds a wrapper around gdb that ensures that the debugging experience isn't affected (the only limitation is that you have to be running the debugger inside the nix environment, which you essentially have to do anyway).Related Issues:
Linked Issues:
Issues closed by this PR:
This change is