Is this the correct mailing list for basic libunwind usage questions? I tried
subscribing at [EMAIL PROTECTED] as described in the package README and
received an error message in reply.
I'm investigating libunwind as a possible replacement for backtrace() because
backtrace occasionally deadlocks inside the signal handler - so I just need
"local" unwinding. My application is compiled on a 32-bit Red Hat node with
gcc 3.4.3, though it is often run on x86_64. I built libunwind, installed to a
scratch directory using "configure --prefix", and tried compiling:
3.4.3/bin/gcc -pipe -g -Wall -DUSE_EXCEPTIONS=1 -rdynamic -Wno-deprecated -o
myApp myApp.o ... <scratch-dir>/install/lib/libunwind.a
.../gcc/3.4.3/lib/libstdc++.a -lm
and I get the following error:
/build/Linux_2.6_rh4_i686/tools/gcc/3.4.3/bin/../lib/gcc/i686-pc-linux-gnu/3.4.3/libgcc.a(unwind-dw2.o)(.text+0x1a10):
In function `_Unwind_Resume':
/tools/gcc/build-3.4.3/gcc-3.4.3/gcc/unwind.inc:224: multiple definition of
`_Unwind_Resume'
<scratch>/install/lib/libunwind.a(Resume.o)(.text+0x0):unwind/Resume.c:30:
first defined here
/tools/binutils/2.15/bin/ld: Warning: size of symbol `_Unwind_Resume' changed
from 399 in <scratch>/install/lib/libunwind.a(Resume.o) to 213 in
<scratch>/install/lib/libunwind.a(Resume.o)
because (I guess) _Unwind_Resume is defined in libstdc++.a.
Does this indicate an incompatibility somewhere, or am I doing something wrong?
Thanks,
--Adam.
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