[llvm-dev] lld/coff section name .debug_str is longer than 8 characters

[Martin Storsjö via llvm-dev]

On Wed, 18 Dec 2019, Carlo Kok via llvm-dev wrote:

> Since updating today I get: section name .debug_str is longer than 8 
> characters and will use a non-standard string table
>
> This is LLD + Coff/DWARF; Is this now unsupported, am I doing something 
> wrong or something else? Alternatively, what can I do to hide it?

The warning itself is harmless and doesn't indicate any other behaviour 
change. It was prompted when MSVC's dumpbin.exe suddenly started erroring 
out on such object files since MSVC 2019 16.2, but that does seem to be a 
bug that is going to be fixed (see 
https://developercommunity.visualstudio.com/content/problem/777863/dumpbin-regression-in-since-toolset-1422.html).

As the dumpbin errors only was a regression and not an intentional change 
(and the bug is marked as "fix pending"), maybe the warning should be 
reverted?

In the meantime, to silence it, you could add the -lldmingw flag, as the 
warnings isn't printed in MinGW environments (where DWARF debug info is 
expected and the default). That will opt in to a few other MinGW 
compatibility behaviours though, but they shouldn't really be fatal 
(unless you explicitly want to make DLLs with no exported symbols at all).

// Martin