ID Number: Q44465
3.x 4.06 4.07 5.0x 5.10 5.13 | 5.01.21 5.02 5.03 5.10 5.13
MS-DOS | OS/2
Summary:
All variables and routines in a module within a library will be linked
into a program when any single variable or routine residing in that
module is referenced. This can cause the following linker error if two
or more modules contain definitions for the same symbol:
L2025 symbol defined more than once
More Information:
For example, in the diagram below, module1 contains routines "a", "b",
and "c". The module2 contains routines "c", "d", and "e". When main()
references "a" and "e", the linker links module1 and module2 from the
library. This results in "c" being defined twice. Removing "c" from
one of the modules, recompiling the module, and replacing the module
in the library with the LIB utility operator "-+" will prevent "c"
from being multiply defined.
+-----------+
| |
| calls "a" |
| calls "e" |
/ | | \
/ +-----------+ \
/ main() \
v v
+-------+ +-------+
| a | | c |
| b | | d |
| c | | e |
| | | |
+-------+ +-------+
module1 module2
For each routine you want to be linked separately, compile a separate
object file and add it to the library.