[tree-ssa] bootstrap failure on ia64

[Richard Guenther <rguenth at tat dot physik dot uni-tuebingen dot de>]

Hi!

I get the following failure bootstrapping on ia64:

/tmp/gcc-obj/gcc/g++ -shared-libgcc -B/tmp/gcc-obj/gcc/ -nostdinc++
-B/home/rguenth//gccssa-180104/ia64-unknown-linux-gnu/bin/
-B/home/rguenth//gccssa-180104/ia64-unknown-linux-gnu/lib/ -isystem
/home/rguenth//gccssa-180104/ia64-unknown-linux-gnu/include -isystem
/home/rguenth//gccssa-180104/ia64-unknown-linux-gnu/sys-include -g -O2
-D_GNU_SOURCE -o abi_check abi_check.o
-L/tmp/gcc-obj/ia64-unknown-linux-gnu/libstdc++-v3/src
-L/tmp/gcc-obj/ia64-unknown-linux-gnu/libstdc++-v3/src/.libs -lm
-Wl,--rpath -Wl,/tmp/gcc-obj/gcc -Wl,--rpath
-Wl,/tmp/gcc-obj/ia64-unknown-linux-gnu/libstdc++-v3/src/.libs
/tmp/gcc-obj/ia64-unknown-linux-gnu/libstdc++-v3/src/.libs/libstdc++.so:
undefined reference to `_Unwind_Resume_or_Rethrow'
collect2: ld returned 1 exit status
make[4]: *** [abi_check] Error 1
make[4]: Leaving directory
`/tmp/gcc-obj/ia64-unknown-linux-gnu/libstdc++-v3/testsuite'
make[3]: *** [all-recursive] Error 1
make[3]: Leaving directory
`/tmp/gcc-obj/ia64-unknown-linux-gnu/libstdc++-v3'
make[2]: *** [all] Error 2
make[2]: Leaving directory
`/tmp/gcc-obj/ia64-unknown-linux-gnu/libstdc++-v3'
make[1]: *** [all-target-libstdc++-v3] Error 2
make[1]: Leaving directory `/tmp/gcc-obj'
make: *** [bootstrap] Error 2

This is debian unstable, gcc is configured with
--enable-languages="c,c++" --enable-threads=posix --enable-__cxa_atexit
--disable-checking

Is this a known problem?

Richard.