http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50381
Bug #: 50381
Summary: Wrong dtor condatgroup section name
Classification: Unclassified
Product: gcc
Version: 4.6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: hubi...@gcc.gnu.org
Created attachment 25260
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=25260
testcase.
Currently openoffice build dies with:
/abuild/jh/trunk-install/lib/gcc/x86_64-unknown-linux-gnu/4.7.0/../../../../x86_64-unknown-linux-gnu/bin/ld:
../../../unxlngx6.pro/obj/hi_factory.o: in function vtable for
HtmlFactory_Idl:hi_factory.cxx(.rodata._ZTV15HtmlFactory_Idl+0x10): warning:
relocation refers to discarded section
/abuild/jh/trunk-install/lib/gcc/x86_64-unknown-linux-gnu/4.7.0/../../../../x86_64-unknown-linux-gnu/bin/ld:
error: hidden symbol '_ZN15HtmlFactory_IdlD1Ev' is not defined locally
collect2: error: ld returned 1 exit status
The problem seems to be dtor output as:
.section
.text._ZN15HtmlFactory_IdlD2Ev,"axG",@progbits,_ZN15HtmlFactory_IdlD5Ev,comdat
.align 2
.p2align 4,,15
.weak _ZN15HtmlFactory_IdlD2Ev
.hidden _ZN15HtmlFactory_IdlD2Ev
.type _ZN15HtmlFactory_IdlD2Ev, @function
_ZN15HtmlFactory_IdlD2Ev:
.LFB2389:
.cfi_startproc
movq $_ZTV15HtmlFactory_Idl+16, (%rdi)
addq $16, %rdi
jmp _ZN11OutputStackD1Ev
.cfi_endproc
.LFE2389:
.size _ZN15HtmlFactory_IdlD2Ev, .-_ZN15HtmlFactory_IdlD2Ev
.weak _ZN15HtmlFactory_IdlD1Ev
.hidden _ZN15HtmlFactory_IdlD1Ev
.set _ZN15HtmlFactory_IdlD1Ev,_ZN15HtmlFactory_IdlD2Ev
and used only as _ZN15HtmlFactory_IdlD1Ev
The following patch is needed to output the alias at all:
Index: cgraphunit.c
===================================================================
--- cgraphunit.c (revision 178757)
+++ cgraphunit.c (working copy)
@@ -1757,6 +1757,7 @@
int i;
struct ipa_ref *ref;
+
for (e = node->callers; e;)
if (e->caller->thunk.thunk_p)
{
@@ -1772,9 +1773,12 @@
if (ref->use == IPA_REF_ALIAS)
{
struct cgraph_node *alias = ipa_ref_refering_node (ref);
+ bool saved_written = TREE_ASM_WRITTEN (alias->thunk.alias);
+ TREE_ASM_WRITTEN (alias->thunk.alias) = 1;
assemble_alias (alias->decl,
DECL_ASSEMBLER_NAME (alias->thunk.alias));
assemble_thunks_and_aliases (alias);
+ TREE_ASM_WRITTEN (alias->thunk.alias) = saved_written;
}
}
but it is not enough to solve the problem.
Testcase is built as
/abuild/jh/trunk-install/bin/g++ -fuse-linker-plugin -fmessage-length=0 -c -O2
-DENABLE_LAYOUT=0 -DENABLE_LAYOUT_EXPERIMENTAL=0 -I.
-I../../../unxlngx6.pro/inc/display_idl -I../inc -I../../../source/inc
-I../../../inc/pch -I../../../inc -I../../../unx/inc
-I../../../unxlngx6.pro/inc -I.
-I/abuild/jh/libreoffice/core/solver/unxlngx6.pro/inc/stl
-I/abuild/jh/libreoffice/core/solver/unxlngx6.pro/inc/external
-I/abuild/jh/libreoffice/core/solver/unxlngx6.pro/inc
-I/abuild/jh/libreoffice/core/solenv/unxlngx6/inc
-I/abuild/jh/libreoffice/core/solenv/inc -I/abuild/jh/libreoffice/core/res
-I/abuild/jh/libreoffice/core/solenv/inc/Xp31
-I/usr/lib64/jvm/java-1_6_0-ibm-1.6.0/include
-I/usr/lib64/jvm/java-1_6_0-ibm-1.6.0/include/linux
-I/usr/lib64/jvm/java-1_6_0-ibm-1.6.0/include/native_threads/include
-I/abuild/jh/libreoffice/core/solver/unxlngx6.pro/inc/udkapi
-I/abuild/jh/libreoffice/core/solver/unxlngx6.pro/inc/offapi
-I/abuild/jh/libreoffice/core/solver/unxlngx6.pro/inc/oovbaapi -I.
-I../../../res -I. -pipe -fvisibility-inlines-hidden -std=c++0x
-Wno-deprecated-declarations -Wall -Wextra -Wendif-labels -Wshadow
-Wno-ctor-dtor-privacy -Wno-non-virtual-dtor -Woverloaded-virtual -frtti
-DLINUX -DUNX -DVCL -DGCC -DX86_64 -DGLIBC=2 -D_PTHREADS -D_REENTRANT
-DNEW_SOLAR -D_USE_NAMESPACE=1 -DHAVE_GCC_VISIBILITY_FEATURE -DX86_64 -D__DMAKE
-DUNIX -DCPPU_ENV=gcc3
-DGXX_INCLUDE_PATH=/abuild/jh/trunk-install/include/c++/4.7.0 -DSUPD=350
-DPRODUCT -DNDEBUG -DOSL_DEBUG_LEVEL=0 -DOPTIMIZE -DGSTREAMER -DCUI
-DSOLAR_JAVA -fexceptions -fno-enforce-eh-specs -DEXCEPTIONS_ON -o
../../../unxlngx6.pro/obj/hi_factory.o
/abuild/jh/libreoffice/core/autodoc/source/display/idl/hi_factory.cxx
