On Mon, 28 Nov 2022, Florian Weimer via Gcc wrote:
* Arsen Arsenović:
Hi,
Florian Weimer via Gcc <gcc@gcc.gnu.org> writes:
Unfortunately, some build systems immediately delete the input source
files. Is there some easy way I can dump the pre-processed and
non-preprocessed sources to my log file? I tried to understand how
-save-temps for crash recovery works, but it seems that this runs
outside of the frontend, in the driver.
Would dumping unconditionally into some "side channel" -dumpdir be a
sufficient workaround?
Of the file names overlap, and it seems in this case, the dump files are
just overwritten. I don't see a way to make the file names unique.
I guess for the tough cases, I can just keep running the build under
strace.
You could override unlink with LD_PRELOAD. Use a special purpose
filesystem (gitfs? I haven't tried it yet). Wrap gcc with a command that
calls the true gcc with a different TMPDIR / -dumpdir each time.
--
Marc Glisse
