Comment # 5 on bug 1220589 from Richard Biener

In a local build I see

[  322s] virtual memory exhausted: Cannot allocate memory

[3629437.381626] mmap: lto1-wpa (18542): VmData 43446743040 exceed data ulimit
43445233664. Update limits or use boot option ignore_rlimit_data.

which is around 40GB.

Uncommenting the existing

#%%define _lto_cflags %%{nil}

makes it work.  If you saw it back in February the issue was present in GCC 13
as well.  Note that when LTOing a large application a lot of memory can be
needed (though 40GB is definitely excessive).

Closer investigation might be interesting but shouldn't be priority.  I suggest
to disable the use of LTO for this package.

I'm CCing Honza who's always on the look out for programs blowing up LTO.