The testcase from PR 18828 produces the improper diagnostic
18828.c: In function foo:
18828.c:11: warning: second parameter of va_start not last named argument
with 4.0 and above if the use of __builtin_va_start() is replaced with
__builtin_stdarg_start(). According to the ChangeLog below
__builtin_stdarg_start was renamed to __builtin_va_start, but I could find no
information about __builtin_stdarg_start() being deprecated or removed.
2002-07-15 Zack Weinberg <[EMAIL PROTECTED]>
* ginclude/varargs.h: Replace with stub which issues #error.
* ginclude/stdarg.h: __builtin_stdarg_start is renamed
__builtin_va_start.
[...]
3.4 does not produce the extraneous warning, so something introduced it after
the renaming of __builtin_stdarg_start to __builtin_va_start.
Testcase:
typedef __builtin_va_list __gnuc_va_list;
typedef __gnuc_va_list va_list;
extern void abort (void);
void foo (int size, ...)
{
va_list ap;
if (size != 21)
abort ();
__builtin_stdarg_start(ap,size);
__builtin_va_end(ap);
}
--
Summary: Extraneous warning with __builtin_stdarg_start and
optimization
Product: gcc
Version: 4.2.0
Status: UNCONFIRMED
Severity: minor
Priority: P3
Component: tree-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: James dot Juran at baesystems dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26264
