[Buildroot] nios2 and TLS

[Buildroot] nios2 and TLS

[Johan Thelin]

Hi all,

I've been spending some time now trying to use buildroot to build a
working toolchain and root for nios2. My requirements include C++
support and threading support.

My problem is that I keep getting stuck on the TLS stuff. The error
message goes something like:

  In file included from ./include/errno.h:62,
                 from libm/k_standard.c:19:
  ./include/bits/uClibc_errno.h:14:18: tls.h: No such file or directory

Removing the need for TLS in the libm only means postponing the error
messages from hell to the libpthread build. As I understand it, this
is inevitable as TLS handles the thread-local storage of variables.

After having studied mailing archived and googled around I've found
two traces of hope:

  #1 The "TLS stuff" seems to be optional. Is it possible to build a
toolchain supporting C++ and threading without it?

  #2 Finding the mystery patch that solves this. I see hints of
Microtronix having a solution that can be found. I just don't know
where to look.


Best regards,

Johan Thelin

[Buildroot] nios2 and TLS

[Steven J. Hill]

You need to NOT select NPTL threading.

-Steve