🚀 go-pugleaf

My question is, "How do you change the default SPARC structure boundaries to
align along 16-bit boundaries instead of 32-bit?" When I use

	GNU C version 2.4.5 (sparc) compiled by GNU C version 2.4.5.

it appears that the version of the gcc compiler we built aligns
structures to double pointer boundaries and not the anticipated 16 bit
boundaries.

Here is the problem in a source nutshell:
 
typedef struct goal_points {
        int   i ;                               /*==> sparc gcc 4 bytes is padded to 8 bytes*/
        double x;                                       /* 8 bytes */
        double y;                                       /* 8 bytes */
        double z;                                       /* 8 bytes */
} TEST;
 
On the SPARC, do doubles have to align on 32 bit boundaries? I need to
pass raw data from a Sparc board to a Motorola 680x0 board - which
aligns along 16-bit boundaries.

I have experimented with numerous Machine-Specific compiler flags but
have not figured out how to cure this ailment. I have tried the
following flags, to no avail:

#define PARM_BOUNDARY 16
#define EMPTY_FIELD_BOUNDARY 16
#define PCC_BITFIELD_TYPE_MATTERS
#define FASTEST_ALIGNMENT 16

Many def's appear to be ignored - no warning message of redefinition. 


Thanks for any insight,

John Michaloski
michalos@cme.nist.gov