Re: Add testcase for PR lto/60820

[Dominique Dhumieres]

> this is stand alone testcase for that PR.
> Comitted to mainline.
> ...

The test fails on darwin with

/opt/gcc/work/gcc/testsuite/gcc.dg/lto/pr60820_0.c:13:1: warning: alias 
definitions not supported in Mach-O; ignored

TIA

Dominique