SDE for Informix: SQLAllocEnv: referenced symbol not found

Error Message

After installing SDE, trying to start the SDE server produces this error:
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ESRI SDE I/O Manager - Version 3.0.2.2 Fri Dec 31
06:36:10 PST 1999
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ld.so.1: /opt/esri/sdeexe302/bin/giomgr: fatal:
relocation error: file /opt/esri/sdeexe302/lib/libsdesrvr.so: symbol
SQLAllocEnv: referenced symbol not found
License Service: communication read error!LO_read_long: Error 0
License service exiting.
Could not start SDE -- Check Network, $SDEHOME disk and DBMS.

Cause

ODBC is used to connect from SDE to Informix. SQLAllocEnv is the first ODBC-related module called from the ClientSDK. SDE 3.x for Informix requires the use of Informix ClientSDK version 2.10. When another version of the ClientSDK is used, this module cannot be loaded.

Solution or Workaround