problem compiling glibc 2.26 with gcc 7.1

[Adhemerval Zanella]

On 02/08/2017 15:45, Waldemar Brodkorb wrote:
> Hi,
> 
> I try to cross-compile latest glibc release 2.26 with binutils 2.28
> and gcc 7.1 to aarch64, but the compilation fails with this error:
> ./md-unwind-support.h: In function 'aarch64_fallback_frame_state':
> ./md-unwind-support.h:58:21: error: field 'uc' has incomplete type
>      struct ucontext uc;
>                      ^~
> 
> The full log is here:
> https://debug.openadk.org/glibc/make.log
> 
> It fails in the final gcc compilation step.
> 
> Anyone have a gcc patch ready?
> Or do I make a mistake? Glibc 2.25 worked fine for me with the
> same gcc and binutils versions.
> I see similar issues with other architectures.
> 
> best regards
>  Waldemar
> 

Check wiki release notes [1] and NEWS about this change:

* The ucontext_t type no longer has the name struct ucontext.  This changes
  the C++ name mangling for interfaces involving this type.

You should use ucontext_t instead of struct ucontext.

[1] https://sourceware.org/glibc/wiki/Release/2.26