builtins va_arg_pack and va_arg_pack_len not implemented

[llvmbot]

Bugzilla Link	17457
Resolution	WONTFIX
Resolved on	Oct 02, 2013 18:52
Version	3.2
OS	Linux
Attachments	gcc test, another gcc test
Reporter	LLVM Bugzilla Contributor
CC	@DougGregor,@zygoloid

Extended Description

/home/rkotler/llvmw/install/bin/../lib/clang/3.4/include/stdarg.h:33:29: note:
expanded from macro 'va_start'
#define va_start(ap, param) __builtin_va_start(ap, param)
^
1 error generated.
rkotler@mipssw006:~/rt-rk-4doug/tmp$ ~/llvmw/install/bin/clang ../tests-c/va-arg-pack-len-1.c -target mips-linux-gnu-gcc -gcc-toolchain /mips/arch/overflow/codesourcery/mips-linux-gnu/lite/release/2011.09-75/Linux -EL -Os -std=gnu89 -mips16 -lm
../tests-c/va-arg-pack-len-1.c:7:18: warning: unknown attribute 'error'
ignored [-Wattributes]
attribute((error ("open with O_CREAT needs 3 arguments, only ...
^
../tests-c/va-arg-pack-len-1.c:9:18: warning: unknown attribute 'warning'
ignored [-Wattributes]
attribute((warning ("open called with more than 3 arguments")));
^
../tests-c/va-arg-pack-len-1.c:81:7: error: use of unknown builtin
'__builtin_va_arg_pack_len' [-Wimplicit-function-declaration]
if (__builtin_va_arg_pack_len () > 1)
^
../tests-c/va-arg-pack-len-1.c:91:37: error: use of unknown builtin
'__builtin_va_arg_pack' [-Wimplicit-function-declaration]
return myopenva (path, oflag, __builtin_va_arg_pack ());
^
../tests-c/va-arg-pack-len-1.c:91:37: note: did you mean
'__builtin_va_arg_pack_len'?
../tests-c/va-arg-pack-len-1.c:81:7: note: '__builtin_va_arg_pack_len' declared
here
if (__builtin_va_arg_pack_len () > 1)
^
2 warnings and 2 errors generated.

[zygoloid]

These builtins are a really bad idea. We're not going to implement them.