Just a guess, but va_list is defined in System i's stdarg.h as:

typedef char *va_list[2];

so perhaps you can simply add your own define for va_copy, something like:

#define va_copy(tmp,ap) memcpy(tmp,ap)

Hth, Elvis

Celebrating 11-Years of SQL Performance Excellence on IBM i, i5/OS and

-----Original Message-----
Subject: [C400-L] Variable argument list error : Operand must be a
modifiable value

Hi again,

I got a problem (hopefully the last one) with a module:

NEOERR *string_appendvf (STRING *str, const char *fmt, va_list ap)
NEOERR *err;
char buf[4096];
int bl, size;
va_list tmp;

va_copy(tmp, ap); // <-- this is the line with the error


Compile error:

Nachricht . . . : /home/schmidt/clearsilver/util/neo_str.c, 152.3:
CZM0025(30) Operand must be a modifiable lvalue.
Cause . . . . . : A modifiable lvalue is an expression representing an
object that can be changed.
Recovery . . . : Change the operand.

Actually I don't know how to solve this. On Linux it compiled without a

I am just a C newbie. Perhaps someone can enlighten me!?

Thanx in advance

Mihael Schmidt

This thread ...


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