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jlintz/gist:1192247

Created September 4, 2011 04:19
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Useful C debug macro
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gistfile1.c
#ifdef DEBUG
#define _DEBUG(fmt, args...) printf("%s:%s:%d: "fmt, __FILE__, __FUNCTION__, __LINE__, args)
#else
#define _DEBUG(fmt, args...)
#endif
@Cat22
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Cat22 commented Aug 24, 2018

You should put {} after the macro defined in the else clause
e.g #define _DEBUG(fmt, args...) {} so it wont mess with "if" statements
I needed to be able to turn debug on and off from a conf file and also #define it out at compile time sometimes, so i use this:

//#define DO_DEBUG
int debug; // set from conf file at runtime
#ifdef DO_DEBUG
#define debug_print(fmt, ...) do { if(debug == 1){plog(__FILE__, ___FUNCTION__, __LINE__, ((fmt)), ##__VA_ARGS__);} } while (0)
#else
#define debug_print(fmt, ...){}
#endif
plog is my logging function

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