Re: [Clamav-users] RE: Configure error - how to pack structures

[Trog]

On Wed, 2004-03-31 at 14:50, Alex S Moore wrote:
> On Solaris with Sun's compilers and latest CVS source I get the
> following error on configure.  I have not seen this error before and I
> have been building clamav with Sun's compiler for many months from the
> released source and occasionally from CVS source.
> 
> | int main(int argc, char **argv) {
> | #pragma pack(1)                       /* has to be in column 1 ! */
> |                       struct { char c; long l; } s;
> |                       return sizeof(s)==sizeof(s.c)+sizeof(s.l) ? 0:1;
> }
> configure:11667: result: no
> configure:11677: error: Need to know how to pack structures with this
> compiler

Have you changed the compiler version? Which version is it? What
architecture are you using (generic, v7, v8, v8a, v8plus, v8plusa, v9,
v9a)

> 
> For sparc, there is a #pragma pack(n) directive and (n) has to be a
> power of 2, so that may be cause of the error.  I am not sure about x86,
> but I also need that architecture.

n can also be 1. It's probably giving a SIGBUS error when executed.

> 
> What info do I need to supply to get this sorted?  I have a section in
> the compiler manual regarding '#pragma pack(n)', but it is over my head.
> 

Could you try compiling the attachment, and running it, and noting the
output. Then do it again with each of the following compiler flags
added, one per re-compile:

-xmemalign=1s
-xmemalign=8i
-xmemalign=2i



Cheers,
-trog


int main(int argc, char **argv) {
#pragma pack(1)
	struct { char c; long l; } s;
	if (sizeof(s)==sizeof(s.c)+sizeof(s.l)) {
		printf("ok\n");
	} else {
		printf("not ok\n");
	}
}

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