https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115907
--- Comment #31 from cqwrteur <unlvsur at live dot com> --- > Why not? It has to pull libraries and headers from somewhere (note that I > do not know what "crossback" means). > > Note that there is desire to not predefine _GNU_SOURCE in C++ modes. See > the PRs Andrew referenced. https://github.com/trcrsired/gcc-releases/releases This one x86_64-pc-linux-gnu.tar.xz in 20240707-x86_64-w64-mingw32 The compiler builds on arch linux. runs on windows. produces binaries works on linux again. This is crossback compilation.