Exclude statements inside C header files

If the IBM® Informix® ESQL/C preprocessor has problems with certain statements in C header files, you can exclude specific lines from the preprocessing that the Informix ESQL/C preprocessor performs as shown in the following example.

Figure 1. ESQL/C and C excerpt that uses a common C header file

/*header file i.h*/
#ifndef ESBDS /*define empty macros, if included by a C\ 
   source*/
#define ESBDS
#define ESEDS
#endif
⋮

ESEDS
statement that you do not want ESQL/C  preprocessor to see
ESBDS


/*name.ec*/
#define ESBDS “EXEC SQL BEGIN DECLARE SECTION;”
#define ESEDS “EXEC SQL END DECLARE SECTION”
main ()
{...
EXEC SQL BEGIN DECLARE SECTION;
   #include “i.h”
EXEC SQL END DECLARE SECTION;
⋮

}