DEBUG PRINT in C as a macro

debugprint.h

// From the TRE package 
 
#ifdef TRE_DEBUG
#include <stdio.h>
#define DPRINT(msg) do {printf msg; fflush(stdout);} while(/*CONSTCOND*/(void)0,0)
#else /* !TRE_DEBUG */
#define DPRINT(msg) do { } while(/*CONSTCOND*/(void)0,0)
#endif /* !TRE_DEBUG */
 
// Updated for my use
 
#define APP_DEBUG 1
 
#ifdef APP_DEBUG
#define DEBUGPRINT(...) fprintf(stdout, __VA_ARGS__)
#define PRNTSTR(val,name) \
    printf("%s = %s\n", name, val);
#else /* !APP_DEBUG */
#define DEBUGPRINT(...) 
#define PRNTSTR(...)
#endif /* !APP_DEBUG */
 
// Inspiration from http://publib.boulder.ibm.com/infocenter/comphelp/v7v91/index.jsp?topic=%2Fcom.ibm.vacpp7a.doc%2Flanguage%2Fref%2Fclrc09cpxmac.htm