macros - Warning: ISO C forbids an empty translation unit -



macros - Warning: ISO C forbids an empty translation unit -

in header file have next code gives me error in title, while trying link.

#ifndef boolean_h #define boolean_h #ifndef false #define false 0 #endif #ifndef true #define true !false #endif #endif indicating error occurs in line of lastly #endif

gcc when compiled -pedantic reports diagnostic when translation unit empty requested c standard. create gcc happy, can add together dummy typedef in empty .c file:

typedef int make_iso_compilers_happy;

or

extern int make_iso_compilers_happy;

c macros

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