[Bug bootstrap/116730] build is broken when building in subdirectory of a subdirectory of the src directory

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116730

--- Comment #22 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Andreas Schwab from comment #15)
> Does it help to change the symlink creation rules in
> libstdc++-v3/src/libbacktrace/Makefile.am to use $(top_srcdir)/.. instead of
> ../../..?  I think that should prevent VAPTH from interfering.


Yes, this was my thought too. I'll try it (on a machine that won't take a year
to build).