Option
/PACKD[[ATA]][[:number]]
The /PACKDoption turns on data-segment packing. The linker considers any segment definition with a class name that does not end in CODE as a data segment. Adjacent data-segment definitions are combined into the same physical segment. The linker stops adding segments to a group when it cannot add another segment without exceeding number bytes; then it starts a new group. The default segment size without /PACKD (or when /PACKD is specified without number) is 65,536 bytes (64K).
The /PACKD option produces slightly faster and more compact code. It affects only programs with multiple data segments and is valid for OS/2 and Windows programs only. It might be necessary to use the /PACKD option to get around the limit of 255 physical data segments per executable file imposed by OS/2 and Windows. Try using /PACKD if you get the following LINK error:
L1073 file-segment limit exceeded
This option may not be safe with other compilers that do not generate fixup records for all far data references.