We want to inject some functions before user's main function and found LD_PRELOAD to override __libc_start_main would work for C programes with gcc.
However, it doesn't work with cpp file which may use g++ by default. We have dumped the symbol and found the difference between binaries from gcc and g++. After compiling with g++, the libc start main function was rename and we don't know how to override it.
