clang is less permissive than gcc in accepting function redefinitions

[llvmbot]

Bugzilla Link	2586
Resolution	INVALID
Resolved on	Mar 12, 2010 00:57
Version	unspecified
OS	All
Reporter	LLVM Bugzilla Contributor
CC	@DougGregor

Extended Description

gcc accepts the following code with a warning, whereas clang rejects
it.

void foo(void *);

foo(void *pfile) {
}

gcc even accepts

void foo(void *, int);

foo(void *pfile) {
}

[DougGregor]

I think we're doing the right thing by rejecting this code. For reference, EDG also rejects it.

[lattner]

i agree.