undefined reference to `__gxx_personality_v0'

[David Daney]

Delvin Defoe wrote:
> After implementing implementing my garbage collector in gcc I tried to
> compile gcc and received the following errors -- undefined reference
> to `__gxx_personality_v0'.
> 
> The logs follow.
> 
> /home/ddefoe/ddc-build/gcc/gcj -B/home/ddefoe/ddc-build/i686
> -pc-linux-gnu/libjava/ -B/home/ddefoe/ddc-build/gcc/ -ffloat-store
> -fomit-frame-pointer -g -O0 -o .libs/jv-convert --main=
> gnu.gcj.convert.Convert -shared-libgcc
> -L/home/ddefoe/ddc-build/i686-pc-linux-gnu/libjava
> -L/home/ddefoe/ddc-build/i686-pc-linux-gnu/libjava/.libs
> ./.libs/libgcj.so
> -L/home/ddefoe/ddc-build/i686-pc-linux-gnu/libstdc++-v3/src
> -L/home/ddefoe/ddc-build/i686-pc-linux-gnu/libstdc++-v3/src/.libs
> -lpthread -ldl -L/home/ddefoe/ddc-build/./gcc -lgcc_s -lc -lgcc_s
> -Wl,--rpath -Wl,/home/ddefoe/ddc-prefix/lib
> ./.libs/libgcj.so: undefined reference to `__gxx_personality_v0'
> collect2: ld returned 1 exit status
> make[3]: *** [jv-convert] Error 1
> make[3]: Leaving directory 
> `/home/ddefoe/ddc-build/i686-pc-linux-gnu/libjava'
> make[2]: *** [all-recursive] Error 1
> make[2]: Leaving directory 
> `/home/ddefoe/ddc-build/i686-pc-linux-gnu/libjava'
> make[1]: *** [all-target-libjava] Error 2
> make[1]: Leaving directory `/home/ddefoe/ddc-build'
> make: *** [all] Error 2
> 
> Any ideas why gcc is giving that undefined reference error?  Any
> suggestions on how to fix this?
> 
__gxx_personality_v0 is defined in libsupc++.a, but it is unclear why 
you need it.  That should only be needed if you compile C++ code that is 
not extern "java".

If you modified any of the files that make up libgcj, you should examine 
the resulting .o files with nm and see which is requiring 
__gxx_personality_v0, and then fix it.

David Daney