Re: C++ PATCH: PR 15815

[Ranjit Mathew <rmathew at gmail dot com>]

Mark Mitchell wrote:
> This patch deprecates "#pragma interface" and "#pragma implementation"
> as per PR 15815.  I'll remove these before 3.5.0.

Hang on - what's the alternative that does the same
thing? That is, inline wherever possible and emit a
backup copy once. (The "once" bit is not necessary
with GNU ld but the "backup" bit is.)

Consider:
--------------------------- 8< ---------------------------
~/src/test/inline > cat x.h
#pragma interface

class X
{
public:
  void junk( void) { }
};

~/src/test/inline > cat x.cpp
#pragma implementation

#include "x.h"

~/src/test/inline > ~/gcc/bin/g++ -O2 -c x.cpp

~/src/test/inline > nm x.o
00000000 W _ZN1X4junkEv
--------------------------- 8< ---------------------------

If I remove the two "#pragma"-s, the definition
for "junk()" is not emitted at all, even if I
specify "-fkeep-inline-functions".

"-fno-default-inline" would unnecessarily pessimise
things.

So what's the practical alternative?

Thanks,
Ranjit.

-- 
Ranjit Mathew          Email: rmathew AT gmail DOT com

Bangalore, INDIA.      Web: http://ranjitmathew.tripod.com/