http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53337
Bug #: 53337
Summary: [4.7.1 lto] produces warning: relocation refers to
discarded section in linker (gold, binutil 2.22)
Classification: Unclassified
Product: gcc
Version: 4.7.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: lto
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: vincenzo.innoce...@cern.ch
I get these kind of warnings (from gold) with 4.7.1, not with 4.8
c++ -v
Using built-in specs.
COLLECT_GCC=c++
COLLECT_LTO_WRAPPER=/build/ge/new-binutils/b/slc5_amd64_gcc470/external/gcc/4.7.0-cms/bin/../libexec/gcc/x86_64-unknown-linux-gnu/4.7.1/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../configure
--prefix=/build/ge/new-binutils/b/tmp/BUILDROOT/a72d117de7727d2dbd542a4ad4d72e45/opt/cmssw/slc5_amd64_gcc470/external/gcc/4.7.0-cms
--disable-multilib --disable-nls --enable-languages=c,c++,fortran
--enable-gold=yes --enable-lto
--with-gmp=/build/ge/new-binutils/b/tmp/BUILDROOT/a72d117de7727d2dbd542a4ad4d72e45/opt/cmssw/slc5_amd64_gcc470/external/gcc/4.7.0-cms
--with-mpfr=/build/ge/new-binutils/b/tmp/BUILDROOT/a72d117de7727d2dbd542a4ad4d72e45/opt/cmssw/slc5_amd64_gcc470/external/gcc/4.7.0-cms
--with-mpc=/build/ge/new-binutils/b/tmp/BUILDROOT/a72d117de7727d2dbd542a4ad4d72e45/opt/cmssw/slc5_amd64_gcc470/external/gcc/4.7.0-cms
--with-ppl=/build/ge/new-binutils/b/tmp/BUILDROOT/a72d117de7727d2dbd542a4ad4d72e45/opt/cmssw/slc5_amd64_gcc470/external/gcc/4.7.0-cms
--with-cloog=/build/ge/new-binutils/b/tmp/BUILDROOT/a72d117de7727d2dbd542a4ad4d72e45/opt/cmssw/slc5_amd64_gcc470/external/gcc/4.7.0-cms
--enable-cloog-backend=isl --enable-shared CC='gcc -fPIC' CXX='c++ -fPIC'
CPP=cpp CXXCPP='c++ -E'
Thread model: posix
gcc version 4.7.1 20120510 (prerelease) (GCC)
ld -v
GNU gold (GNU Binutils 2.22) 1.11
when complied with -flto and -O2 this simple code
cat boostLto.cc
#include "boost/thread/mutex.hpp"
namespace edm {
namespace rootfix {
boost::mutex* getGlobalMutex();
}
}
boost::mutex* edm::rootfix::getGlobalMutex() {
static boost::mutex m_;
return &m_;
}
produces
c++ -O2 -fPIC -shared -o bha.so boostLto.cc -Iboost/1.49.0/include
c++ -O2 -flto -fPIC -shared -o bha.so boostLto.cc -Iboost/1.49.0/include
/tmp/innocent/ccwLpwep.ltrans1.ltrans.o:ccwLpwep.ltrans1.o:function
_ZTVN5boost16exception_detail10clone_implINS0_19error_info_injectorISt12out_of_rangeEEEE.local.234:
warning: relocation refers to discarded section
/tmp/innocent/ccwLpwep.ltrans1.ltrans.o:ccwLpwep.ltrans1.o:function
_ZTVN5boost16exception_detail10clone_implINS0_19error_info_injectorISt12out_of_rangeEEEE.local.234:
warning: relocation refers to discarded section
/tmp/innocent/ccwLpwep.ltrans1.ltrans.o:ccwLpwep.ltrans1.o:function
_ZTVN5boost16exception_detail10clone_implINS0_19error_info_injectorISt12out_of_rangeEEEE.local.234:
warning: relocation refers to discarded section
/tmp/innocent/ccwLpwep.ltrans1.ltrans.o:ccwLpwep.ltrans1.o:function
_ZTVN5boost16exception_detail10clone_implINS0_19error_info_injectorISt12out_of_rangeEEEE.local.234:
warning: relocation refers to discarded section
/tmp/innocent/ccwLpwep.ltrans1.ltrans.o:ccwLpwep.ltrans1.o:function
_ZTVN5boost16exception_detail10clone_implINS0_19error_info_injectorINS_9gregorian15bad_day_of_yearEEEEE.local.240:
warning: relocation refers to discarded section
/tmp/innocent/ccwLpwep.ltrans1.ltrans.o:ccwLpwep.ltrans1.o:function
_ZTVN5boost16exception_detail10clone_implINS0_19error_info_injectorINS_9gregorian15bad_day_of_yearEEEEE.local.240:
warning: relocation refers to discarded section
/tmp/innocent/ccwLpwep.ltrans1.ltrans.o:ccwLpwep.ltrans1.o:function
_ZTVN5boost16exception_detail10clone_implINS0_19error_info_injectorINS_9gregorian15bad_day_of_yearEEEEE.local.240:
warning: relocation refers to discarded section
/tmp/innocent/ccwLpwep.ltrans1.ltrans.o:ccwLpwep.ltrans1.o:function
_ZTVN5boost16exception_detail10clone_implINS0_19error_info_injectorINS_9gregorian15bad_day_of_yearEEEEE.local.240:
warning: relocation refers to discarded section
/tmp/innocent/ccwLpwep.ltrans1.ltrans.o:ccwLpwep.ltrans1.o:function
_ZTVN5boost16exception_detail10clone_implINS0_19error_info_injectorINS_9gregorian16bad_day_of_monthEEEEE.local.232:
warning: relocation refers to discarded section
/tmp/innocent/ccwLpwep.ltrans1.ltrans.o:ccwLpwep.ltrans1.o:function
_ZTVN5boost16exception_detail10clone_implINS0_19error_info_injectorINS_9gregorian16bad_day_of_monthEEEEE.local.232:
warning: relocation refers to discarded section
/tmp/innocent/ccwLpwep.ltrans1.ltrans.o:ccwLpwep.ltrans1.o:function
_ZTVN5boost16exception_detail10clone_implINS0_19error_info_injectorINS_9gregorian16bad_day_of_monthEEEEE.local.232:
warning: relocation refers to discarded section
/tmp/innocent/ccwLpwep.ltrans1.ltrans.o:ccwLpwep.ltrans1.o:function
_ZTVN5boost16exception_detail10clone_implINS0_19error_info_injectorINS_9gregorian16bad_day_of_monthEEEEE.local.232:
warning: relocation refers to discarded section
/tmp/innocent/ccwLpwep.ltrans2.ltrans.o:ccwLpwep.ltrans2.o:function
_ZTVN5boost16exception_detail10clone_implINS0_19error_info_injectorINS_12bad_weak_ptrEEEEE.local.230:
warning: relocation refers to discarded section
/tmp/innocent/ccwLpwep.ltrans2.ltrans.o:ccwLpwep.ltrans2.o:function
_ZTVN5boost16exception_detail10clone_implINS0_19error_info_injectorINS_12bad_weak_ptrEEEEE.local.230:
warning: relocation refers to discarded section
/tmp/innocent/ccwLpwep.ltrans2.ltrans.o:ccwLpwep.ltrans2.o:function
_ZTVN5boost16exception_detail10clone_implINS0_19error_info_injectorINS_12bad_weak_ptrEEEEE.local.230:
warning: relocation refers to discarded section
/tmp/innocent/ccwLpwep.ltrans2.ltrans.o:ccwLpwep.ltrans2.o:function
_ZTVN5boost16exception_detail10clone_implINS0_19error_info_injectorINS_12bad_weak_ptrEEEEE.local.230:
warning: relocation refers to discarded section
/tmp/innocent/ccwLpwep.ltrans5.ltrans.o:ccwLpwep.ltrans5.o:function
_ZTVN5boost16exception_detail10clone_implINS0_19error_info_injectorINS_9gregorian11bad_weekdayEEEEE.local.246:
warning: relocation refers to discarded section
/tmp/innocent/ccwLpwep.ltrans5.ltrans.o:ccwLpwep.ltrans5.o:function
_ZTVN5boost16exception_detail10clone_implINS0_19error_info_injectorINS_9gregorian11bad_weekdayEEEEE.local.246:
warning: relocation refers to discarded section
/tmp/innocent/ccwLpwep.ltrans5.ltrans.o:ccwLpwep.ltrans5.o:function
_ZTVN5boost16exception_detail10clone_implINS0_19error_info_injectorINS_9gregorian11bad_weekdayEEEEE.local.246:
warning: relocation refers to discarded section
/tmp/innocent/ccwLpwep.ltrans5.ltrans.o:ccwLpwep.ltrans5.o:function
_ZTVN5boost16exception_detail10clone_implINS0_19error_info_injectorINS_9gregorian11bad_weekdayEEEEE.local.246:
warning: relocation refers to discarded section
/tmp/innocent/ccwLpwep.ltrans5.ltrans.o:ccwLpwep.ltrans5.o:function
_ZTVN5boost16exception_detail10clone_implINS0_19error_info_injectorINS_21thread_resource_errorEEEEE.local.236:
warning: relocation refers to discarded section
/tmp/innocent/ccwLpwep.ltrans5.ltrans.o:ccwLpwep.ltrans5.o:function
_ZTVN5boost16exception_detail10clone_implINS0_19error_info_injectorINS_21thread_resource_errorEEEEE.local.236:
warning: relocation refers to discarded section
/tmp/innocent/ccwLpwep.ltrans5.ltrans.o:ccwLpwep.ltrans5.o:function
_ZTVN5boost16exception_detail10clone_implINS0_19error_info_injectorINS_21thread_resource_errorEEEEE.local.236:
warning: relocation refers to discarded section
/tmp/innocent/ccwLpwep.ltrans5.ltrans.o:ccwLpwep.ltrans5.o:function
_ZTVN5boost16exception_detail10clone_implINS0_19error_info_injectorINS_21thread_resource_errorEEEEE.local.236:
warning: relocation refers to discarded section
