g++-3.3 -Winline warns about functions that cannot/should not be inlined

[Thomas Richter <thor@math.TU-Berlin.DE>]

>Submitter-Id:  net
>Originator:    Thomas Richter
>Organization:
>Confidential:  no
>Synopsis:      g++-3.3 -Winline broken
>Severity:      serious
>Priority:      medium
>Category:      c++
>Class:         sw-bug
>Release:       3.3 20030509 (Debian prerelease)
>Environment:
System: Linux skywise 2.4.20 #7 Thu May 15 19:53:29 CEST 2003 i686 unknown
Architecture: i686

	<machine, os, target, libraries (multiple lines)>
host: i386-pc-linux-gnu
build: i386-pc-linux-gnu
target: i386-pc-linux-gnu
configured with: ../src/configure -v 
--enable-languages=c,c++,java,f77,pascal,objc,ada,treelang --prefix=/usr 
--mandir=/usr/share/man --infodir=/usr/share/info 
--with-gxx-include-dir=/usr/include/c++/3.3 --enable-shared 
--with-system-zlib --enable-nls --without-included-gettext 
--enable-__cxa_atexit --enable-clocale=gnu --enable-debug 
--enable-java-gc=boehm --enable-java-awt=xlib --enable-objc-gc i386-linux
>Description:
g++-3.3 -Winline generates warnings for functions it cannot inline
that it shouldn't even try to inline because they are neither declared 
as "inline", nor defined in the class body.
>How-To-Repeat:
Save the following as "main.cpp"
/* snip */
#include "foo.hpp"
int main(int,char)
{
  return foo();
}
/* snip */
Save the following as "foo.hpp"
/* snip */
int foo(void);
/* snip */
Save the following as "foo.cpp"
/* snip */
int foo(void)
{
  return 0;
}
/* snip */
Then compile with

$ g++-3.3 -O3 -Winline main.cpp new.cpp

Result is a useless warning that int foo(void) could not be inlined. 
(Correct, but supposed not to be inline-able).
>Fix:
        Avoid "-Winline"