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Client APIs and toolsYou can use the HCL Informix® implementation of client APIs to develop applications for Informix® database servers.
ESQL/C GuideThe Informix® ESQL/C Programmer's Manual explains how to use Informix® ESQL/C, the Informix® implementation of Embedded Structured Query Language (SQL) for C (ESQL/C), to create client applications with database-management capabilities.
What is Informix® ESQL/C?
Compile programs
Compile the Informix® ESQL/C programYou use the esql command to compile your Informix® ESQL/C program.
Run the C preprocessor first

Run the C preprocessor first

With Informix® ESQL/C, you change the default order of processing when you compile your Informix ESQL/C program. Informix ESQL/C allows you to run the C preprocessor on the Informix ESQL/C source file first, and then pass that file to the Informix ESQL/C preprocessor. This feature enables your Informix ESQL/C program to access variables made available by C preprocessor directives.

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