http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54732
Ian Lance Taylor <ian at airs dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2012-09-28
CC| |ian at airs dot com
Ever Confirmed|0 |1
--- Comment #1 from Ian Lance Taylor <ian at airs dot com> 2012-09-28 04:30:19
UTC ---
The problem seems to be the use of automake automatic dependencies in
conjunction with header files read from the previous stage in conjunction with
bootstrap-lean. The library is compiled using "prev-gcc/xgcc -Bprev-gcc/".
That causes gcc to search prev-gcc/include. Some header files are found in
that directory, notably unwind.h, stddef.h, stdarg.h, and stdint.h. Those
dependencies are recorded in the automake dependency file.
So far, so good. Unfortunately bootstrap-lean removes prev-gcc when the new
stage is built. Then when you run "make install", the libbacktrace Makefile
sees that it depends on files in prev-gcc/include. Those files do not exist,
so the targets are automatically rebuilt. In your case they are being rebuilt
with an older compiler, which fails.
