Q50705

layout	title	permalink
page	Q50705: LINK : Warning L4011 Caused By Invalid /PACKCODE Group Size	/pubs/pc/reference/microsoft/kb/Q50705/

Q50705: LINK : Warning L4011 Caused By Invalid /PACKCODE Group Size

Article: Q50705
Version(s): 3.65 4.06 4.07 5.01.21 5.03 | 5.01.21 5.03
Operating System: MS-DOS                      | OS/2
Flags: ENDUSER | S_C S_QUICKC S_QUICKASM S_PASCAL DOCERR
Last Modified: 10-NOV-1989

The LINK code packing option, /PAC[:n], groups together neighboring
code segments into the same segment of maximum size "n" bytes. The
results of using /PAC will only be reliable when "n" is in the range
of 0 to 65500. Page 278 of the "Microsoft C 5.1 CodeView and
Utilities" reference manual states the default value for "n" is 65530.
This is incorrect.

The linkers from the following products were tested with the /PAC
option to determine their behavior with various values of "n":

   C 5.10
   Pascal 4.00
   FORTRAN 5.00
   QuickC 1.01
   QuickC 2.00
   QuickASM 2.01

Note: Linkers were checked in both real and protected mode where
appropriate.

The following table shows the acceptable values that can be used with
the /PAC[:n] option and what error message will occur when the value
of "n" is out of range:

----------------------------------------------------------------------
Value of "n"      LINK Vers.   Error Message
----------------------------------------------------------------------
0 to 65500        3.65         No Errors/Warnings
                  4.06         No Errors/Warnings
                  4.07         No Errors/Warnings
                  5.01.21      No Errors/Warnings
                  5.03         No Errors/Warnings

65501 to 65536    3.65         LINK : warning L4011:
                  4.06         LINK : warning L4011: PACKCODE value
                               exceeding 65500 unreliable
                  4.07         (same as above)
                  5.01.21      (same as above)
                  5.03         (same as above)

65537 and over    3.65         LINK : fatal error L1005:
                  4.06         LINK : fatal error L1005: packing limit
                               exceeds 65536 bytes
                  4.07         (same as above)
                  5.01.21      (same as above)
                  5.03         (same as above)
----------------------------------------------------------------------

Note : With LINK Version 5.03 and later, the /PAC option has been
changed to /PACKC to differentiate /PACKC[ODE] from the new
/PACKD[ATA] option.