🚀 go-pugleaf

David,

I took a stab at compiling a package called MEM which was originally written
in portable C on an Apollo platform. All of the programs compile
nicely except support.c where the following occurs:


   %make
   gcc -c      -DPOSH -DKANT -DDO_NOT_USE_PROTOTYPES      -I../include -DSTATS -DVERBOSE support.c
   In file included from /usr/local/lib/gcc-lib/vax-dec-ultrix4.3/2.4.5/include/stdio.h:2, from support.c:2:
   ../include/stdarg.h:11: warning: `va_start' redefined
   /usr/local/lib/gcc-lib/vax-dec-ultrix4.3/2.4.5/include/varargs.h:86: warning: this is the location of the previous definition
   ../include/stdarg.h:12: warning: `va_arg' redefined
   /usr/local/lib/gcc-lib/vax-dec-ultrix4.3/2.4.5/include/varargs.h:97: warning: this is the location of the previous definition
   ../include/stdarg.h:13: warning: `va_end' redefined
   /usr/local/lib/gcc-lib/vax-dec-ultrix4.3/2.4.5/include/varargs.h:88: warning: this is the location of the previous definition
   support.c:13: macro `va_start' used with just one arg
   support.c:35: macro `va_start' used with just one arg
   support.c:50: macro `va_start' used with just one arg
   *** Error code 1
   com

So there is a discrepency between gcc's va_start and cc's va_start on the
Apollo. Now, here an excerpt from gcc's stdarg.h file :

    /* stdarg.h for GNU.
       Note that the type used in va_arg is supposed to match the
       actual type **after default promotions**.
       Thus, va_arg (..., short) is not valid.  */
    #ifndef _STDARG_H
    #ifndef _ANSI_STDARG_H_
    #ifndef __need___va_list
    #define _STDARG_H
    #define _ANSI_STDARG_H_
    #endif /* not __need___va_list */
    #undef __need___va_list
    
    ......some stuff deleted......
    
    #define va_start(AP, LASTARG) 						\
     (AP = ((__gnuc_va_list) __builtin_next_arg ()))
    
    #undef va_end
    void va_end (__gnuc_va_list);		/* Defined in libgcc.a */
    #define va_end(AP)
    
    /* We cast to void * and then to TYPE * because this avoids
       a warning about increasing the alignment requirement.  */
    
And here is the usage of va_start in support.c :


    mem_printf(va_alist)
    va_dcl
    {
        char *fmt, buf[4096];
        va_list args;
    
        fflush(stdout);
        va_start(args);                  /* program crashes here */
    
        fmt = va_arg(args, char *);
        vsprintf(buf, fmt, args);
        va_end(args);                   /* and here */
    
        write(1, buf, strlen(buf));
    }

What should I do? What , change the arguments to va_start, and if so 
to what? Or, can this be handled with an ifdef, if so what would be
the spelling on the command line?

Thanks,

-emmett