Re: [Libunwind-devel] build error on Linux x86

[Dave Watson]

On 03/12/17 10:26 PM, Mario Emmenlauer wrote:
> 
> I'm trying to build libunwind as a prerequisite to another library
> on different flavors of Linux. It works on all x86_64 platforms I've
> tried, but fails on Ubuntu 16.04 x86 (gcc 5.4) with below error.
> I guess I'm doing something wrong or missing a dependency, can you
> please help? I've tried libunwind 1.2-rc1 and 1.2.
> 
> PS: on a completely unrelated note, the website mentions 1.1 as the
> latest download, but 1.2 is available from the download folder.

Thanks, I'll update the website shortly.

> This is the error I get:
> [...]
> In file included from ./elf32.h:7:0,
>                  from ../include/tdep-x86/libunwind_i.h:35,
>                  from ../include/tdep/libunwind_i.h:23,
>                  from ../include/libunwind_i.h:344,
>                  from elfxx.h:33,
>                  from elf64.h:7,
>                  from elf64.c:2:
> ./elfxx.h:70:1: note: previous definition of 'elf_map_image' was here
>  elf_map_image (struct elf_image *ei, const char *path)
>  ^

It looks like it is pulling in both tdep-x86/libunwind_i.h *and*
tdep-x86_64/libunwind_i.h (and hence both elf32.h and elf64.h), but
it's not clear to me why. Possible include path issue?  Are
libunwind-devel headers already installed on your ubuntu machine?