inline.c

inline.c

#include <stdio.h>

inline void i_hello() {
    printf("hello\n");
}

static inline void si_hello() {
    printf("static inline hello\n");
}

extern inline void ei_hello() {
    printf("static inline hello\n");
}

int main(int argc, char *argv[]) {
    i_hello();
    si_hello();
    ei_hello();
    return 0;
}

/*
$ clang inline.c                                                             
/tmp/cc-uA9XPc.o: In function `main':                                        
inline.c:(.text+0x48): undefined reference to `i_hello'                      
collect2: ld returned 1 exit status                                          
clang: error: linker (via gcc) command failed with exit code 1 (use -v to see
invocation)                                                                  
*/

/*
$ gcc inline.c                                                                
/tmp/ccDgCZat.o: In function `main':                                          
inline.c:(.text+0x39): undefined reference to `ei_hello'                      
collect2: ld returned 1 exit status                                           
 * */