implicit casts in g++

[Kalle Anderson]

I have to port some legacy C code to another platform for testing 
purposes. I can't modify the code (for configuration management reasons) 
and for a reason I won't get into, I have to compile it as C++ code. 
However, it is doing lots of implicit pointer casts that the C compiler 
allowed. (void* to char*, etc...). Is there anyway compiler switch to 
make g++ ignore those errors? THanks,