RISC-V 64bit and 32bit binaries on the same system

[Joseph Myers]

On Mon, 7 Sep 2020, Andreas K. Hüttel via Libc-alpha wrote:

> gcc and glibc build and install fine. However, there's a fundamental problem 
> with this configuration. ld.so does not filter by ELFCLASS (as it does, e.g., 
> for x64-64 vs i686), and the order of directories in the dynamic linker config 
> determines e.g. which libstdc++ a binary sees first. [#]

Whenever I asked about such configurations, the answer was always that the 
Linux kernel port did not support running RV32I processes on RV64I 
processors, although the architecture definition supported it as an 
optional feature.  I don't know if that Linux kernel support has since 
been implemented.

<https://sourceware.org/legacy-ml/libc-alpha/2018-01/msg00008.html> is 
where I described what you need to do in glibc to support that kind of 
configuration for an architecture.

-- 
Joseph S. Myers
joseph@codesourcery.com