On 01/08/2013 08:52 AM, Alan Coopersmith wrote:
If I change it from <sys/varargs.h> to <varargs.h> then gcc reports a more
useful error:
/usr/gcc/4.7/lib/gcc/i386-pc-solaris2.11/4.7.2/include/varargs.h:4:2: error:
#error "GCC no longer implements <varargs.h>."
/usr/gcc/4.7/lib/gcc/i386-pc-solaris2.11/4.7.2/include/varargs.h:5:2: error:
#error "Revise your code to use <stdarg.h>."
Changing the include from <sys/varargs.h> to <stdarg.h> makes it compile without
any errors or warnings.
-alan-
Thanks a lot Alan. I was including what the man page for va_arg(9F)
said. I will file a man page bug.
Rao.
On 01/ 8/13 08:28 AM, Rao Shoaib wrote:
I am porting a 3rd party driver that compiles when using gcc 3.4.3. I want to
use the more newer version "gcc (GCC) 4.5.2 " that ships as /usr/bin/gcc.
However I am not able to resolve the following issue. Any ideas on how to
resolve this issue. This is due to a change in gcc which eliminated
__builtin_stdarg_start.
nptbld-x:rshoaib:/tmp] (517)>cat y.c
#include <sys/types.h>
#include <strings.h>
#include <sys/varargs.h>
int
ci_sprintf(char *buf, const char *fmt, ...)
{
va_list args;
#ifdef WORKS
__builtin_va_start(args, 0);
#else
va_start(args, fmt);
#endif
(void) vsnprintf(buf, 100, fmt, args);
va_end(args);
return strlen(buf);
}
main()
{
}
[nptbld-x:rshoaib:/tmp] (519)>gcc y.c -o yc
Undefined first referenced
symbol in file
__builtin_stdarg_start /var/tmp//ccE.aiTM.o
ld: fatal: symbol referencing errors. No output written to yc
collect2: ld returned 1 exit status
The only way I have been able to work this out is by using __builtin_va_start
instead of va_start. That just seems wrong.
Rao.
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