c++/3698: improper handling of an extern declared inline function

[martin.gerbershagen@icn.siemens.de]

>Number:         3698
>Category:       c++
>Synopsis:       improper handling of an extern declared inline function
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Jul 16 01:46:00 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator:     Martin Gerbershagen
>Release:        g++-3.0
>Organization:
>Environment:
sparc-sun-solaris2.6
>Description:
If a function, that has been defined as a global inline
function, is declared extern in a local scope, a reference
to an external function is emitted in the object code and
not the substitution of the inline function. If the 
extern declaration is moved to the global scope the inline
substitution works correctly. The generated code creates
link errors later on.

g++ b.C
/var/tmp/ccaFlZr0.o: In function `main':
/var/tmp/ccaFlZr0.o(.text+0x8): undefined reference to `OHashKey(X const&)'
collect2: ld returned 1 exit status

>How-To-Repeat:
class X {
public:
   int i;
};

inline const int& OHashKey(const X& x) {
   return x.i;
}

int main() {
   extern const int& OHashKey(const X& x);
   X x;
   return OHashKey(x);
}
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: