[Bug lto/86548] GCC could tmp file /tmp/ccDxn2Yd.ltrans0.ltrans.o could be based on the compiled file name

["rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86548

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Jonny Grant from comment #0)
> It's pretty hard to work out which file this o file comes from. Could it
> include the first file name in the tmp path to make it clearer where it came
> from?  
> 
> Currently:
> /tmp/ccDxn2Yd.ltrans0.ltrans.o
> 
> Expected:
> /tmp/main.cpp.ccDxn2Yd.ltrans0.ltrans.o
> 
> Example below of what I see
> 
> jonny@asus:~/domains$ make
> g++-8 -std=c++11 -g -ggdb -pthread -O0 -Werror -Wextra -Wshadow
> -Wformat-nonliteral -Wall -Wnonnull -Wpedantic -fstack-protector-strong 
> -Wdiv-by-zero -Wsign-conversion -Wnull-dereference -flto
> -Wno-nonnull-compare -o proc main.cpp test_whois.cpp <snip file list>
> /usr/bin/x86_64-linux-gnu-ld: Dwarf Error: Offset (1678049557) greater than
> or equal to .debug_str size (5846).

^^^

oh, and as for this DWARF section sizes are limited to 2GB as offsets are
32bits only.  The above offset is 0x64050115 which _may_ indicate an
overflow (and .debug_str is unlikely to be just 5846 bytes in size).

If you do not use LTO how large are your .debug_* sections in the final
executable?