Bug#954681: [gnat-9] crash caused by SOURCE_DATE_EPOCH patch
Hello.
Commit 2e5e37249f09e54bb62e3ab87508e43ff709a4fb should improve the
situation.
It reverts the part affecting s-os_lib.adb. A GCC build produces the
same checksum for it than 9.3.0-8 in libgnat-9, hopefully making gnat
usable again by existing packaged libraries (I don't know how to test
this on a porterbox).
The remaining part, slightly adapted, passes the regression tests for
this specific bug.
If all goes well, please lower the severity of this bug, but keep it
open as a reminder.
* Unless an objection arises, the gcc-10 branch should eventually
cherry-pick c1d276b0e2cb60140389aa4c23ac3addb7a77af3.
* Ludovic has noticed that the initial error message
CONSTRAINT_ERROR : uintp.adb:1959 overflow check failed
probably reveals a bug that should be investigated by itself.
No time computation is supposed to trigger a range overflow in an
unrelated package.
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