On Tue, Nov 02, 2021 at 05:02:12AM -0700, H.J. Lu wrote:
> > On Sat, Oct 30, 2021 at 10:54 PM H.J. Lu via Gcc-patches
> > <gcc-patches@gcc.gnu.org> wrote:
> > >
> > > sanitizer_platform_limits_freebsd.cpp must include <md5.h> from the OS,
> > > not include/md5.h in GCC source tree which is included by libbacktrace
> > > support. Disable libbacktrace on sanitizer_platform_limits_freebsd.cpp
> > > to avoid include/md5.h to restore bootstrap on FreeBSD.
> >
> > Err, but that will just get complaints about disabled libbacktrace
> > backtracking
> > (from within the sanitizer?)?
>
> It disables libbacktrace backtracking only on one file,
> sanitizer_platform_limits_freebsd.cpp,
> which contains only data on FreeBSD. I highly doubt that libbacktrace
> backtracking is
> used in it.
include/md5.h is a header we have control over, can't we just add to it
something like:
#ifdef USE_SYSTEM_MD5
#include_next <md5.h>
#else
Current header content
#endif
and arrange for that macro to be -DUSE_SYSTEM_MD5 when building that
libsanitizer source file?
Jakub
