Help with C overlays?
Can anyone help me with a little problem I'm having with
BLINK overlays under SAS/Lattice C 5.10a?
It seems that when I have uninitialized global variables defined
in a child node and then try to run my program, I get an "Unable
to load <programname>: file is not an object module" error. But
if I initialize the globals, the program loads and runs fine.
EXAMPLE:
"child.c" — (This version will get the error)
int GlobalVariable;
void OverlayedRoutine (void)
{
return;
}
vs.
"child.c" — (This version will run just fine)
int GlobalVariable = 1;
void OverlayedRoutine (void)
{
return;
}
common for both test cases:
"main.c"
extern void OverlayedRoutine (void);
void main (void)
{
OverlayedRoutine ();
}
All test routines were compiled with lc v.5.10a with no command
line options ('cept the filenames).
My test "BLINK WITH" file looks like this:
FROM LIB:c.o
FROM main.o
OVERLAY
child.o
#
LIB LIB:lc.lib
LIB LIB:amiga.lib
TO test
I suspect that it has something to do with BSS vs DATA? Any
help would be greatly appreciated!
Greg Marquez
(ps anyone have SAS's support number? Did they drop the 900 number?)