You want to execute an application program, test, that you have translated with the C/C++ Precompiler.
If you want a trace file to be written when the test program is executed, set the environment variable SQLOPT to -X. The corresponding command in a Bash shell is as follows:
export SQLOPT=-X
The trace file test.pct is written when the test program is executed. This file is located in the same directory as the test program.
In a Bash shell you can, for example, execute the following command:
export SQLOPT="-d TST -u TEST,TEST"
The result of this is that your application program uses, at runtime, the database instance TST and the user TEST with the password TEST.