[Buildroot] [PATCHv4] bfin: fix issues with internal toolchain, re-enable C++ support
Waldemar Brodkorb
wbx at openadk.org
Fri Aug 19 22:27:38 UTC 2016
Hi Thomas,
Thomas Petazzoni wrote,
> From: Waldemar Brodkorb <wbx at openadk.org>
>
> The three patches allow to compile applications using TLS emulation from
> libgcc or C++ applications.
>
> The patches 892-libgcc-mkmap-symver-support-skip_underscore.patch and
> 893-libgcc-config-bfin-use-the-generic-linker-version-in.patch fixes how
> libgcc is generated, by making the necessary libgcc symbols declared
> "GLOBAL", and therefore visible outside of libgcc. This fixes a large
> number of undefined reference issues (for either C++ applications or
> applications using TLS emulation). This was reported as gcc PR74748.
>
> The patch 894-libgcc-fix-DWARF-compilation-with-FDPIC-targets.patch
> allows to build DWARF in FDPIC mode. This patch replaces the older
> 892-disable-dwarf-bfin.patch, as instead of disabling DWARF support, it
> fixes it. This was reported as gcc PR68468.
>
> In order to get C++ working without unresolved symbols, we also need to
> disable symbol versioning (--disable-symvers). This is a remaining issue
> in gcc which will be investigated at a later point.
>
> Since this commit fixes C++ support in Blackfin, it re-enables the
> selection of C++ support for this architecture.
Tested and works great. Awesome. Wonderful.
Thanks for cleaning up my messy hacks :)
best regards
Waldemar
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