Bug in va_* macros for sparc-sun-solaris2.6

[Adam Fedor <fedor at doc dot com>]

RE: Bug in va_* macros - incorrect output of char argument
MACHINE: sparc-sun-solaris2.6, sparc-sun-solaris2.5.1, sparc-sun-sunos-4.1.4
COMPILER: egcs-1.0.1, gcc-2.8.0, gcc-2.8.1, gcc-2.7.2.3

The following test file illustrates a bug in sparc gcc. The output here is for
egcs-1.0.1, but the bug also appears in gcc-2.8.1, gcc-2.7.2.3 and egcs-1.0.1
for sparc-sun-sunos-4.1.4, and others...

The actual output is:

% gcc -v
Reading specs from /usr/local/lib/gcc-lib/sparc-sun-solaris2.6/egcs-2.90.23/specs
gcc version egcs-2.90.23 980102 (egcs-1.0.1 release)
% gcc test-va.c
% ./a.out
<20>
<0>
%

While the correct output is:
% ./a.out
<20>
<21>
%
----- test file ----
#include <stdio.h>
#include <stdarg.h>

void * print(char x,...);

void *
print(char x,...)
{
  char y, z;
  va_list ap;

  y = x;
  printf("<%d>\n", y);
  va_start(ap, x);
  z = va_arg(ap, char);
  printf("<%d>\n", z);
  va_end(ap);
  return NULL;
}

int 
main()
{
  print((char)20, (char)21);
  return 0;
}

-- 
Adam Fedor               | Those who can't do, simulate
Digital Optics Co.       |
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