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* [Bug other/29971] New: anonymous namespace vs deprecated static keyword (different linkage).
@ 2006-11-24 13:43 pluto at agmk dot net
2006-11-24 13:44 ` [Bug other/29971] " pluto at agmk dot net
2006-11-25 1:43 ` pinskia at gcc dot gnu dot org
0 siblings, 2 replies; 3+ messages in thread
From: pluto at agmk dot net @ 2006-11-24 13:43 UTC (permalink / raw)
To: gcc-bugs
in theory the anonymous namespace is a `static' keyword superior.
in fact it breaks applications that use dlopen() with RTLD_GLOBAL.
the so called superior emits symbols with different binding.
e.g.:
static keyword:
00000000 4 OBJECT LOCAL DEFAULT 4 N::a_
namespace superior:
00000000 4 OBJECT GLOBAL DEFAULT 4 N::(anonymous namespace)::a_
$ make CPPFLAGS=-DSUPERIOR && ./main
i486-gnu-linux-g++ -Wall -O1 -g0 -s -DSUPERIOR *.cpp -c
i486-gnu-linux-g++ -Wall -O1 -g0 -s -DSUPERIOR m1.o A.o -o libm1.so -shared
i486-gnu-linux-g++ -Wall -O1 -g0 -s -DSUPERIOR m2.o A.o -o libm2.so -shared
i486-gnu-linux-g++ -Wall -O1 -g0 -s -DSUPERIOR main.cpp -o main -ldl
i486-gnu-linux-strip --strip-unneeded *.so main
i1 = 0x55b6b4
i2 = 0x55b6b4
Aborted
$ make && ./main
i486-gnu-linux-g++ -Wall -O1 -g0 -s *.cpp -c
i486-gnu-linux-g++ -Wall -O1 -g0 -s m1.o A.o -o libm1.so -shared
i486-gnu-linux-g++ -Wall -O1 -g0 -s m2.o A.o -o libm2.so -shared
i486-gnu-linux-g++ -Wall -O1 -g0 -s main.cpp -o main -ldl
i486-gnu-linux-strip --strip-unneeded *.so main
i1 = 0x759670
i2 = 0x112670
--
Summary: anonymous namespace vs deprecated static keyword
(different linkage).
Product: gcc
Version: 4.1.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: other
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: pluto at agmk dot net
GCC target triplet: elf-*
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29971
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug other/29971] anonymous namespace vs deprecated static keyword (different linkage).
2006-11-24 13:43 [Bug other/29971] New: anonymous namespace vs deprecated static keyword (different linkage) pluto at agmk dot net
@ 2006-11-24 13:44 ` pluto at agmk dot net
2006-11-25 1:43 ` pinskia at gcc dot gnu dot org
1 sibling, 0 replies; 3+ messages in thread
From: pluto at agmk dot net @ 2006-11-24 13:44 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from pluto at agmk dot net 2006-11-24 13:43 -------
Created an attachment (id=12682)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=12682&action=view)
testcase
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29971
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug other/29971] anonymous namespace vs deprecated static keyword (different linkage).
2006-11-24 13:43 [Bug other/29971] New: anonymous namespace vs deprecated static keyword (different linkage) pluto at agmk dot net
2006-11-24 13:44 ` [Bug other/29971] " pluto at agmk dot net
@ 2006-11-25 1:43 ` pinskia at gcc dot gnu dot org
1 sibling, 0 replies; 3+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2006-11-25 1:43 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from pinskia at gcc dot gnu dot org 2006-11-25 01:43 -------
Fixed in 4.2.0 by the patch which fixed PR 21581 and PR 25915.
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution| |FIXED
Target Milestone|--- |4.2.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29971
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2006-11-25 1:43 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2006-11-24 13:43 [Bug other/29971] New: anonymous namespace vs deprecated static keyword (different linkage) pluto at agmk dot net
2006-11-24 13:44 ` [Bug other/29971] " pluto at agmk dot net
2006-11-25 1:43 ` pinskia at gcc dot gnu dot org
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