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From: "anitha.boyapati at atmel dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug debug/48459] [4.6/4.7 Regression] avr: Assertion failure with -gdwarf-2
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48459

--- Comment #27 from Anitha Boyapati <anitha.boyapati at atmel dot com> 2011-06-16 06:34:57 UTC ---

(In reply to comment #24)
> The testcase at the head of the PR is now fixed.

I could build avr-gcc from trunk and run couple of simple testcases.

[anitha@turing objdir]$ avr-gcc -v
Using built-in specs.
COLLECT_GCC=avr-gcc
COLLECT_LTO_WRAPPER=/home/anitha/install/libexec/gcc/avr/4.7.0/lto-wrapper
Target: avr
Configured with: ../configure --target=avr --prefix=/home/anitha/install/
--with-dwarf2 --enable-languages=c --disable-libssp --disable-nls
--with-gmp=/proj/install/gmp-4.3.2/ --with-mpc=/proj/install/mpc-0.8.2/
--with-mpfr=/proj/install/mpfr-2.4.2/ CFLAGS=-g
Thread model: single
gcc version 4.7.0 20110615 (experimental) (GCC) 


> 
> For the 4.6 branch, this required also backporting

Any idea if the build succeeded for 4.6 branch? I tried and it failed. (branch:
gcc-4_6-branch)


../../../../libgcc/../gcc/libgcc2.c: In function '__lshrdi3':
../../../../libgcc/../gcc/libgcc2.c:427:1: internal compiler error: in
dwarf2out_frame_debug_expr, at dwarf2out.c:2671
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
make[4]: *** [_lshrdi3.o] Error 1
make[4]: Leaving directory
`/home/anitha/gcc-4.6-branch/objdir/avr/avr25/libgcc'
make[3]: *** [multi-do] Error 1
make[3]: Leaving directory `/home/anitha/gcc-4.6-branch/objdir/avr/libgcc'