Experimental Physics and
Industrial Control System

[email protected] (Nick Rees) · Fri, 8 Nov 1996 09:32:07 -1000 (HST)

We don't use c++ much at all here so the latest releases are testing
us... We don't have the c++ compiler from Sun and so are forced to use
g++, and we are finding it has a problem with variable argument lists.

Does anyone know the way around this? It is a known problem we have with
g++, but it hasn't worried us before and we have never found the solution.

The problem first occurs when compiling gdd.cc:

/opt/gnu/bin/g++ -ansi -pedantic -Wall -O   -DSOLARIS   -I. -I.. -I/ukirt_sw/epics/R3.13.0.beta2/include  -DUNIX   -c ../gdd.cc
../gdd.cc: In method `long int gdd::copyStuff(class gdd *, int)':
../gdd.cc:427: warning: suggest parentheses around assignment used as truth value
../gdd.cc: In method `long int gdd::copyData(const class gdd *)':
../gdd.cc:1389: warning: comparison between signed and unsigned
../gdd.cc: In method `gddAtomic::gddAtomic(int, aitEnum, int ...)':
../gdd.cc:1418: `__builtin_va_alist' undeclared (first use this function)
../gdd.cc:1418: (Each undeclared identifier is reported only once
../gdd.cc:1418: for each function it appears in.)
../gdd.cc:1421: warning: implicit declaration of function `int __builtin_va_arg_incr(...)'
../gdd.cc:1414: warning: `void * ap' might be used uninitialized in this function
gmake[1]: *** [gdd.o] Error 1
gmake[1]: Leaving directory `/ukirt_sw/epics/src/R3.13.0.beta2/base/src/gdd/O.solaris'
gmake: *** [install.solaris] Error 2

The relevant lines are:

1411: gddAtomic::gddAtomic(int app, aitEnum prim, int dimen, ...):
1412:                 gdd(app,prim,dimen)
1413: {
1414:         va_list ap;
1415:         int i;
1416:         aitIndex val;
1417: 
1418:         va_start(ap,dimen);
1419:         for(i=0;i<dimen;i++)
1420:         {
1421:                 val=va_arg(ap,aitUint32);
1422:                 bounds[i].set(0,val);
1423:         }
1424:         va_end(ap);
1425: }

There may, of course, be other problems but my build hasn't got that
far...

I did ask once which c++ compilers were to be supported but got no
reply - I also know Jeff said at one point that he managed to compile
base with gcc and g++, but I don't know whether it still does. How
about the situation that I have - is using Solaris c (because nominally
we only support the vendor supplied C compilers) with GNU g++
supported, or is there a library problem sometimes? How does all this
effect our support for other hosts (Linux, HP etc?).

I would dearly like someone to clarify all this because now it is
impossible to compile base without a c++ compiler of some sort or
other.

Cheers,

Nick Rees

Joint Astronomy Centre                    Ph:       +1 (808) 961-3756
660 N. Aohoku Place                       Fax:      +1 (808) 961-6516
Hilo, HI.  96720                          Internet: [email protected]

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System