Re: libbacktrace patch committed: Trace through shared libraries

[Hans-Peter Nilsson <hp at bitrange dot com>]

On Tue, 9 Oct 2012, Ian Lance Taylor wrote:
> Patch bootstrapped and ran libbacktrace and Go testsuites on
> x86_64-unknown-linux-gnu.  Committed to mainline.

Trying x86_64 host gcc 4.1.2 (--target=rl78-elf but not the issue) at
r192285:

/bin/sh ./libtool --tag=CC   --mode=compile gcc -DHAVE_CONFIG_H
-I. -I/tmp/rl78b/gcc/libbacktrace  -I /tmp/rl78b/gcc/li\
bbacktrace/../include -I /tmp/rl78b/gcc/libbacktrace/../libgcc
-I ../libgcc -I ../gcc/include -I ../../gcc/include  -fu\
nwind-tables -W -Wall -Wwrite-strings -Wstrict-prototypes
-Wmissing-prototypes -Wold-style-definition -Wmissing-format-\
attribute -Wcast-qual -Werror  -g -O2 -c -o dwarf.lo
/tmp/rl78b/gcc/libbacktrace/dwarf.c
libtool: compile:  gcc -DHAVE_CONFIG_H -I.
-I/tmp/rl78b/gcc/libbacktrace -I
/tmp/rl78b/gcc/libbacktrace/../include -I /\
tmp/rl78b/gcc/libbacktrace/../libgcc -I ../libgcc -I
../gcc/include -I ../../gcc/include -funwind-tables -W -Wall
-Wwri\
te-strings -Wstrict-prototypes -Wmissing-prototypes
-Wold-style-definition -Wmissing-format-attribute -Wcast-qual
-Werr\
or -g -O2 -c /tmp/rl78b/gcc/libbacktrace/dwarf.c -o dwarf.o
cc1: warnings being treated as errors
/tmp/rl78b/gcc/libbacktrace/dwarf.c: In function
'dwarf_fileline':
/tmp/rl78b/gcc/libbacktrace/dwarf.c:2766: warning: dereferencing
type-punned pointer will break strict-aliasing rules
/tmp/rl78b/gcc/libbacktrace/dwarf.c: In function
'backtrace_dwarf_add':
/tmp/rl78b/gcc/libbacktrace/dwarf.c:2887: warning: dereferencing
type-punned pointer will break strict-aliasing rules
/tmp/rl78b/gcc/libbacktrace/dwarf.c:2899: warning: dereferencing
type-punned pointer will break strict-aliasing rules
make[3]: *** [dwarf.lo] Error 1


brgds, H-P