User's Guide

Fixing Link-Time Problems

After the XL Fortran compiler processes the source files, the linker links the resulting object files together. Any messages issued at this stage come from the ld or bind commands. A frequently encountered message, along with its solution, is listed here for your convenience:

0706-317 ERROR: Undefined or unresolved symbols detected:
Symptom: A program cannot be linked because of unresolved references.
Explanation: Either needed object files or libraries are not being used during linking, there is an error in the specification of one or more external names, or there is an error in the specification of one or more procedure interfaces.
Solution: You may need to do one or more of the following actions:

• Compile again with the -bloadmap option to create a file that contains information about undefined symbols.
• Make sure that if you use the -U option, all intrinsic names are in lowercase.
• Use the linker -brename option on the compiler command line to change the names of some symbols at link time.