Re: Build issue since version 4.18 using gcc-4.9

[Vincent Fortier]

Thnx, the tip paid off, switching to -std=gnu99 solved the issue...
Help much appreciated!

Cheers!

- vin

Le dim. 27 nov. 2022, à 06 h 13, Simon Josefsson <simon@josefsson.org> a écrit :
>
> Vincent Fortier <th0ma7@gmail.com> writes:
>
> > While preparing a gnutls update I ended-up updating libtasn1 from
> > 4.16.  Going to 4.17 works but anything after that fails with:
>
> Thanks for the report!  I can reproduce this using:
>
> ./configure ac_cv_func_explicit_bzero=no CPPFLAGS="-std=c99"
>
> In other words, the problem is due to a combination of a platform
> without explicit_bzero and forcing GCC into C99 mode where it doesn't
> support 'asm', so it is not possible to implement 'explicit_bzero'.  Why
> do you hard code -std=c99?  Try just removing that.  Or use -std=gnu99'
> to allow GCC to use 'asm'.
>
> Analysing further, the 'explicit_bzero' function is only used by
> 'read_file' in a mode that we never use (for reading sensitive files),
> so it is never needed by libtasn1.  This is not ideal, but I'm not sure
> what a maintainable solution is.
>
> /Simon