I've been trying for days to build a mingw-w64 toolchain, I'm stuck at building the cross-compiler, GCC 8.1.0.
The problem is that I must have Thread Local Storage (TLS) enabled, therefore I pass --enable-tls to GCC's configure script.
With no success, since at the end of the build, _GLIBCXX_HAVE_TLS is undefined in config.h, same thing for _GLIBCXX_HAVE_CC_TLS.
I tried to browse and even patch the autotools files to understand how to make it work.
Has anyone encountered this issue?
Note that the mingw-w64 installer on Windows has TLS symbols, so it must be possible to build GCC for this target and TLS.
Sorry for this very late response, but trying to resolve the same problem, I just found this commit on GCC : https://github.com/gcc-mirror/gcc/commit/cc1e28878a228b6c4a0872e56d97ac88971b7725
Seems to be exactly what we need. Not tested yet on my side.