On 07/21/2017 10:15 AM, Ximin Luo wrote: > (Please keep me on CC, I am not subscribed) > > > Proposal > ======== > > This patch series adds a new environment variable BUILD_PATH_PREFIX_MAP. When > this is set, GCC will treat this as extra implicit "-fdebug-prefix-map=$value" > command-line arguments that precede any explicit ones. This makes the final > binary output reproducible, and also hides the unreproducible value (the > source > path prefixes) from CFLAGS et. al. which many build tools (understandably) > embed as-is into their build output. I'd *really* avoid doing this with magic environment variables. Make it a first class option to the compiler. Yes, it means projects that want this behavior have to arrange to pass that flag to their compiler, but IMHO that's much preferred over environment variables.
Jeff
