undefined reference for inline function

Asked Oct 15 '19 at 14:29

Active Oct 15 '19 at 14:29

Viewed 76 times

I have composed below small program to explain the issue,

#include<stdio.h>

inline void test() {
        printf("test inline\n");
        return;
}
int main () {
        test();
        return 0;
}

While compiling it gives below error.

jeegarp@jeegarp:~$ gcc test.c 
/tmp/ccrpsWXN.o: In function `main':
4.c:(.text+0xa): undefined reference to `test'
collect2: error: ld returned 1 exit status

Now if i mark my inline function as static then i do not see this error.

I am not able to understand this observation.

Does it compiler specific issue?

asked Oct 15 '19 at 14:29

Jeegar Patel

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Fails with 1) name other than `test` 2) without `inline`? – chux - Reinstate Monica Oct 15 '19 at 14:31
1

@chux it fails with other name also. It woks fine without inline keyword – Jeegar Patel Oct 15 '19 at 14:32
1

@dbush IMO, that's a bad dupe. This is much better: https://stackoverflow.com/questions/16245521/c99-inline-function-in-c-file/16245669#16245669 And even there, there are no cites to the C standard. – Andrew Henle Oct 15 '19 at 14:44
And the comments on this question are worth reading: https://stackoverflow.com/questions/35613360/inline-definition-causes-unresolved-symbols-in-program?noredirect=1&lq=1 – Andrew Henle Oct 15 '19 at 14:49
Surprising i am able to compile this file as gcc -std=gnu89 test.c or gcc -O2 test.c – Jeegar Patel Oct 15 '19 at 14:49

undefined reference for inline function

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