I was running sparse on some code I maintain and saw a bunch of
warnings like this:
/usr/include/bits/stdio2.h:98:25: error: undefined identifier '__builtin_va_arg_pack'
/usr/include/bits/stdio2.h:98:25: error: not a function <noident>
It looks like gcc defines this in recent versions:
http://gcc.gnu.org/onlinedocs/gcc/Constructing-Calls.html
It seems like something like this might do the trick for
__builtin_va_arg_pack_len:
-----------------[snip]------------------
diff --git a/lib.c b/lib.c
index 7e822eb..db981d8 100644
--- a/lib.c
+++ b/lib.c
@@ -779,6 +779,7 @@ void declare_builtin_functions(void)
add_pre_buffer("extern double __builtin_fabs(double);\n");
add_pre_buffer("extern void __sync_synchronize();\n");
add_pre_buffer("extern int __sync_bool_compare_and_swap(void *, ...);\n");
+ add_pre_buffer("extern size_t __builtin_va_arg_pack_len(void);\n");
/* Add Blackfin-specific stuff */
add_pre_buffer(
-----------------[snip]------------------
...but I'm unclear on how best to fix the errors around
__builtin_va_arg_pack since it doesn't seem to return a well-defined
type.
Thanks...
--
Jeff Layton <jlayton@xxxxxxxxxx>
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