acceptance of invalid enum syntax

[llvmbot]

Bugzilla Link	2416
Resolution	FIXED
Resolved on	May 28, 2010 17:28
Version	unspecified
OS	Linux
Attachments	buggy source file
Reporter	LLVM Bugzilla Contributor

Extended Description

buggy source code(enum.c):

enum en {};

error:
ccc -c enum.c
enum.c
clang -emit-llvm-bc -x c -o enum.o enum.c

proper:
gcc -c enum.c
enum.c:1: error: expected identifier before ‘}’ token

clang svn: At revision 51993.

[lattner]

We accept this as an extension and emit a warning when -pedantic is used.

[llvmbot]

We accept this as an extension and emit a warning when -pedantic is used.

I changed this into error to match gcc's behavior. Warning under -pedantic promoted bad
coding practice. There were two positive Sema tests in clang test suite which used empty enums
inadvertently.
http://llvm.org/viewvc/llvm-project?view=rev&revision=105011