Checking if your kit is complete...
Looks good
Writing Makefile for c_plus_plus
cp c_plus_plus.pm blib/lib/c_plus_plus.pm
/Users/cpanrun/build/5.10.0/bin/perl /Users/cpanrun/build/5.10.0/lib/ExtUtils/xsubpp  -typemap /Users/cpanrun/build/5.10.0/lib/ExtUtils/typemap  c_plus_plus.xs > c_plus_plus.xsc && mv c_plus_plus.xsc c_plus_plus.c
Please specify prototyping behavior for c_plus_plus.xs (see perlxs manual)
gcc -c  -x c++ -fno-common -DPERL_DARWIN -no-cpp-precomp -arch ppc -arch i386 -nostdinc -B/Developer/SDKs/MacOSX10.4u.sdk/usr/include/gcc -B/Developer/SDKs/MacOSX10.4u.sdk/usr/lib/gcc -isystem/Developer/SDKs/MacOSX10.4u.sdk/usr/include -F/Developer/SDKs/MacOSX10.4u.sdk/System/Library/Frameworks -mmacosx-version-min=10.3 -DPRIVLIB_LAST_IN_INC -fno-strict-aliasing -pipe -O3   -DVERSION=\"0.1\" -DXS_VERSION=\"0.1\"  "-I/Users/cpanrun/build/5.10.0/lib/CORE"   c_plus_plus.c
c_plus_plus.xs:16: error: ISO C++ forbids declaration of 'message' with no type
c_plus_plus.xs:16: error: ISO C++ forbids declaration of 'message' with no type
lipo: can't open input file: /var/tmp//ccZiR5Oa.out (No such file or directory)
make: *** [c_plus_plus.o] Error 1