bd satish <bdsat...@gmail.com> writes: > [...] > The following piece of code, gives "undefined references" to > __real_malloc, __real_free, etc.: > Compiled with: > g++ -fmudflap references.cc -lmudflap > > /lib64/libmudflap.a(mf-runtime.o): In function `__mfu_check': > ../libmudflap/mf-runtime.c:912: undefined reference to `__real_malloc' > [...]
According to libmudflap/mf-impl.h, since you're using ordinary archives rather than shared libraries (-fPIC) these __real_FOO functions are expected to be provided by the linker: (1) The static method involves a list of -wrap=foo flags being passed to the linker, which then links references to "foo" to the symbol "__wrap_foo", and links references to "__real_foo" to the symbol "foo". When compiled without -DPIC, libmudflap.a contains such __wrap_foo functions which delegate to __real_foo functions in libc to get their work done. So, something appears wrong with this wrapping mechanism in your case. Can you rerun g++ with -v to see how the linker is invoked? Perhaps there is something missing for the C++ static-linking case. - FChE
