Run the C preprocessor first

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