hrm, looks like the mlm stripped out the attachment to the last mail, so
here's the previous mail cutnpasted into the message body:

hi there,

recently i was having a discussion regarding ccache with a co-worker, in
the context of how derived objects could be cached to speed up a build
process.  the question came up: could a similar generalization be used
for linked executables (thus wrapping ld along with cc)?

for object files, you have the source file, included headers, compiler
command-line, and compiler which are all considered dependencies for the
derived object.  

couldn't it be possible to do the same trick for linked executables?
for example, when linking, the hash could be computed from the object
files being linked along with the standard stuff (cmdline args, compiler
information, etc).

what do you think?

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