Hi, Here is the output of (gcc -v): Using built-in specs. COLLECT_GCC=g++ COLLECT_LTO_WRAPPER=/home/user/installed/gcc/libexec/gcc/x86_64-unknown-linux-gnu/4.7.2/lto-wrapper Target: x86_64-unknown-linux-gnu Configured with: ../configure --prefix=/home/user/installed/gcc --enable-languages=c,c++ --disable-multilib --disable-multiarch --enable-checking=runtime --enable-libmudflap --enable-libgomp --disable-bootstrap --enable-static --disable-shared --disable-decimal-float --with-system-zlib --disable-libitm --disable-build-poststage1-with-cxx --disable-build-with-cxx --without-cloog --without-ppl --disable-nls --enable-threads --enable-__cxa_atexit --with-gmp=/home/bdsatish/foss/installed/gmp --with-mpfr=/home/bdsatish/foss/installed/mpfr --with-mpc=/home/bdsatish/foss/installed/mpc Thread model: posix gcc version 4.7.2 (GCC)
Thanks & Regards, Satish On 22 September 2012 04:33, Frank Ch. Eigler <f...@redhat.com> wrote: > 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
