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const int CONSTANT_A=1;
#ifdef OPENMP
 
void test(int a,int b){
    if(CONSTANT_A!=0){
        printf("%d-%d",a,b);
    }
}
#endif OPENMP
 
int main(){
    int a,b=3;
    test(a,b);
}

prog.c:9:8: warning: extra tokens at end of #endif directive [-Wendif-labels]
 #endif OPENMP
        ^~~~~~
prog.c: In function ‘main’:
prog.c:13:5: warning: implicit declaration of function ‘test’ [-Wimplicit-function-declaration]
     test(a,b);
     ^~~~
prog.c:13:5: warning: ‘a’ is used uninitialized in this function [-Wuninitialized]
     test(a,b);
     ^~~~~~~~~
/home/eaT92K/ccOlnvBM.o: In function `main':
prog.c:(.text.startup+0xe): undefined reference to `test'
collect2: error: ld returned 1 exit status

Standard output is empty