[Bug c/82723] Collisions with standard library not detected by linker

[berck.nash at wdc dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82723

--- Comment #3 from Berck Nash <berck.nash at wdc dot com> ---
I can see that someone might want to do this, but it certainly doesn't seem
like it should be default behavior.  I think it's a bit absurd to expect an end
user to know the names of every function called by every library function.  It
seems like, by default, a collision should be reported.  Additionally, even if
this is a feature, there isn't even check to see if the functions have
compatible parameter lists, which can make for some disastrous mistakes...