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From: "tianbin at cernet dot edu.cn" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug lto/52634] New: multiple definition error when using alias Date: Tue, 20 Mar 2012 12:32:00 -0000 [thread overview] Message-ID: <bug-52634-4@http.gcc.gnu.org/bugzilla/> (raw) http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52634 Bug #: 52634 Summary: multiple definition error when using alias Classification: Unclassified Product: gcc Version: 4.7.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: lto AssignedTo: unassigned@gcc.gnu.org ReportedBy: tianbin@cernet.edu.cn When compiling a project which have 11 cpp files with -flto, g++-4.7 reports the following error ------ xxx.ltrans25.ltrans.o:(.bss+0x0): multiple definition of `cfliteKeyCallBacks' xxx.ltrans15.ltrans.o:(.bss+0x0): first defined here xxx.ltrans29.ltrans.o:(.data+0xc80): multiple definition of `cfliteKeyCallBacks' xxx.ltrans15.ltrans.o:(.bss+0x0): first defined here in xxx.ltrans25.s, I found ---- .hidden cfliteKeyCallBacks .globl cfliteKeyCallBacks .bss .align 32 .type cfliteKeyCallBacks, @object .size cfliteKeyCallBacks, 48 cfliteKeyCallBacks: .zero 48 .set cfliteArrayCallBacks.4936,cfliteKeyCallBacks in xxx.ltrans15.s, I found ---- .hidden cfliteKeyCallBacks .globl cfliteKeyCallBacks .bss .align 32 .type cfliteKeyCallBacks, @object .size cfliteKeyCallBacks, 48 cfliteKeyCallBacks: .zero 48 .set cfliteValueCallBacks.3513,cfliteKeyCallBacks in xxx.ltrans29.s, I found ---- .hidden cfliteKeyCallBacks .globl cfliteKeyCallBacks .data .align 32 .type cfliteKeyCallBacks, @object .size cfliteKeyCallBacks, 48 cfliteKeyCallBacks: .quad 0 .quad _ZL17cflite_key_retainPK13__CFAllocatorPKv.19440 .quad _ZL18cflite_key_releasePK13__CFAllocatorPKv.19434 .quad _ZL21cflite_key_copy_descrPKv.19447 .quad _ZL16cflite_key_equalPKvS0_.19429 .quad _ZL15cflite_key_hashPKv.19425 And in cflite.cpp, the corespond source is --------------- ... CFDictionaryKeyCallBacks cfliteKeyCallBacks = { 0, cflite_key_retain, cflite_key_release, cflite_key_copy_descr, cflite_key_equal, cflite_key_hash, }; extern CFDictionaryValueCallBacks cfliteValueCallBacks __attribute__((alias("cfliteKeyCallBacks"))); extern CFArrayCallBacks cfliteArrayCallBacks __attribute__((alias("cfliteKeyCallBacks"))); The project compiles ok without -flto.
next reply other threads:[~2012-03-20 12:10 UTC|newest] Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top 2012-03-20 12:32 tianbin at cernet dot edu.cn [this message] 2012-03-20 13:16 ` [Bug lto/52634] " rguenth at gcc dot gnu.org 2012-03-20 14:17 ` tianbin at cernet dot edu.cn 2012-03-20 14:31 ` tianbin at cernet dot edu.cn 2012-03-20 14:56 ` rguenth at gcc dot gnu.org 2012-03-20 15:05 ` rguenth at gcc dot gnu.org 2012-03-20 17:22 ` hubicka at gcc dot gnu.org 2012-03-25 10:24 ` hubicka at gcc dot gnu.org 2012-04-09 23:39 ` hubicka at gcc dot gnu.org 2012-04-10 15:10 ` hubicka at gcc dot gnu.org 2012-10-14 9:14 ` tianbin at cernet dot edu.cn 2021-12-24 8:59 ` pinskia at gcc dot gnu.org
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