Q34502: /NOE Option for Redefinition Error L2044

Article: Q34502
Product(s): See article
Version(s): 3.x 5.x | 5.10
Operating System(s): MS-DOS | OS/2
Keyword(s): ENDUSER | | mspl13_basic
Last Modified: 13-OCT-1988

The /NOEXTDICTIONARY switch tells the linker NOT to take advantage of
additional information recorded in Extended Dictionary in the library
file. This additional information describes which module in the library
calls any other module from the same library, saving linker number
of passes through the library file to pick up all required modules.

If you have a call in your code to the library function FOO and FOO
calls another function BAR from the same library, then at processing
time of FOO, the linker will pull out BAR. This process occurs because
the extended dictionary has a link between FOO and BAR.

Linking without /NOE causes the following error if you want to pull
FOO in from the library but you want to provide its own BAR:

L2044 BAR : symbol multiply defined, use /NOE

This error resulted from the linker pulling FOO and BAR from the
same library, then later it sees BAR coming from user .OBJ file.

Using /NOE in this case prevents the linker from pulling out
BAR from the library, so your BAR routine is used instead.

If you have genuine symbol redefinition, then when linking with /NOE
you will see the following error:

L2025 BAR : symbol defined more than once

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