Try to build it with llvm/clang. It would be ridiculously slow + oom. Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows ________________________________ From: NightStrike <nightstrike@xxxxxxxxx> Sent: Monday, March 25, 2024 3:01:00 AM To: sotrdg sotrdg <euloanty@xxxxxxxx> Cc: gcc-help <gcc-help@xxxxxxxxxxx> Subject: Re: GCC's thin lto PLEASE On Sun, Mar 24, 2024, 22:18 sotrdg sotrdg via Gcc-help <gcc-help@xxxxxxxxxxx<mailto:gcc-help@xxxxxxxxxxx>> wrote: gosh. GCC compiles so slow compared to clang with thin lto for C++, since the translation unit tends to be big, without thin lto, it is extremely hard to even get code compile nowadays due to its slowness. Did you try the option "-fno-fat-lto-objects" ? Also, to get significant speedup, use -flto=auto. That will run parallel jobs. Read https://gcc.gnu.org/onlinedocs/gcc/Optimize-Options.html for more fun. The LTO section is extensive.