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* [Bug c++/31462] New: Unnamed namespace and exported symbols
@ 2007-04-03 16:09 guillaume dot melquiond at ens-lyon dot fr
2007-04-03 19:04 ` [Bug c++/31462] " pinskia at gcc dot gnu dot org
0 siblings, 1 reply; 2+ messages in thread
From: guillaume dot melquiond at ens-lyon dot fr @ 2007-04-03 16:09 UTC (permalink / raw)
To: gcc-bugs
(NB: I'm not suggesting to change the linkage of functions in an unnamed
namespace to internal.)
Unless specified otherwise, functions in an unnamed namespace have external
linkage. Does that mean that g++ has to export the corresponding symbol? As the
function cannot be used from another translation unit, it seems to me it is a
waste of space, and perhaps of inter-procedural optimization opportunities too.
If there is a case where it matters for the symbol to be exported, please
disregard this enhancement-request (but please provide an example as it
interests me).
The reason for this request is that I recently come across a program where
forcefully removing the export of these symbols in the object files sped up
executable linking by more than 15%. So it would provide a nice gain if GCC was
not exporting the symbols.
--
Summary: Unnamed namespace and exported symbols
Product: gcc
Version: 4.1.2
Status: UNCONFIRMED
Severity: enhancement
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: guillaume dot melquiond at ens-lyon dot fr
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31462
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug c++/31462] Unnamed namespace and exported symbols
2007-04-03 16:09 [Bug c++/31462] New: Unnamed namespace and exported symbols guillaume dot melquiond at ens-lyon dot fr
@ 2007-04-03 19:04 ` pinskia at gcc dot gnu dot org
0 siblings, 0 replies; 2+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2007-04-03 19:04 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from pinskia at gcc dot gnu dot org 2007-04-03 20:03 -------
This has already been implemented for 4.2.0. See PR 25915 which I am closing
this as a dup of.
*** This bug has been marked as a duplicate of 25915 ***
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution| |DUPLICATE
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31462
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2007-04-03 16:09 [Bug c++/31462] New: Unnamed namespace and exported symbols guillaume dot melquiond at ens-lyon dot fr
2007-04-03 19:04 ` [Bug c++/31462] " pinskia at gcc dot gnu dot org
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