[Bug c/48194] New: gcc -std=c99 fails to link when calling inline function

[adam at adamrosenfield dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48194

           Summary: gcc -std=c99 fails to link when calling inline
                    function
           Product: gcc
           Version: 4.3.5
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: a...@adamrosenfield.com


$ cat test.c
inline void foo() {}
int main(void) { foo(); }
$ gcc test.c -std=c99
test.c:(.text+0xa): undefined reference to `foo'
collect2: ld returned 1 exit status

Same result happens with -std=gnu99.  Bug does NOT happen with optimization
turned on: at any level besides -O0, this compiles correctly.

$ gcc --version
gcc-4.3 (Ubuntu 4.3.5-3ubuntu1) 4.3.5
Copyright (C) 2008 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

$ uname -a Linux epoch 2.6.35-27-generic #48-Ubuntu SMP Tue Feb 22 20:25:46 UTC
2011 x86_64 GNU/Linux

This bug also happens on at least the following versions:

gcc-4.4 (Ubuntu/Linaro 4.4.4-14ubuntu5) 4.4.5
gcc-4.5 (Ubuntu/Linaro 4.5.1-7ubuntu2) 4.5.1
gcc (GCC) 4.7.0 20110317 (experimental)

It does NOT happen in:

gcc-4.1 (GCC) 4.1.3 20080704 (prerelease) (Ubuntu 4.1.2-29ubuntu1)

Related: bug 34697