與優化級別編譯C++項目

我已經不是我的C++項目，我可以成功編譯使用這一行： g++ -o minit minit.c MinitGlobal.h Item.c ItemsetQueue.c Transaction.c Error.h Dataset.c SubDataset.c RankItems.c MinitAlgo.c但如果我添加優化級別如下圖所示（同爲-O3）：與優化級別編譯C++項目
[[email protected] minit++]$ g++ -o -O0 minit minit.c MinitGlobal.h Item.c ItemsetQueue.c Transaction.c Error.h Dataset.c SubDataset.c RankItems.c MinitAlgo.c 
minit: In function `_start': 
(.text+0x2a8): multiple definition of `_start' 
/usr/lib/gcc/x86_64-amazon-linux/4.6.3/../../../../lib64/crt1.o:(.text+0x0): first defined here 
minit: In function `_fini': 
(.fini+0x0): multiple definition of `_fini' 
/usr/lib/gcc/x86_64-amazon-linux/4.6.3/../../../../lib64/crti.o:(.fini+0x0): first defined here 
minit:(.rodata+0x0): multiple definition of `_IO_stdin_used' 
/usr/lib/gcc/x86_64-amazon-linux/4.6.3/../../../../lib64/crt1.o:(.rodata.cst4+0x0): first defined here 
minit: In function `__data_start': 
(.data+0x0): multiple definition of `__data_start' 
/usr/lib/gcc/x86_64-amazon-linux/4.6.3/../../../../lib64/crt1.o:(.data+0x0): first defined here 
minit:(.rodata+0x8): multiple definition of `__dso_handle' 
/usr/lib/gcc/x86_64-amazon-linux/4.6.3/crtbegin.o:(.rodata+0x0): first defined here 
minit: In function `_init': 
(.init+0x0): multiple definition of `_init' 
/usr/lib/gcc/x86_64-amazon-linux/4.6.3/../../../../lib64/crti.o:(.init+0x0): first defined here 
/tmp/cc0cvoT6.o: In function `main': 
minit.c:(.text+0x4d2): multiple definition of `main' 
minit:(.text+0x0): first defined here 
/tmp/ccRfRvQv.o:(.bss+0x0): multiple definition of `minit::Itemset::count' 
minit:(.bss+0x638): first defined here 
/tmp/ccQhesuV.o: In function `minit::ItemsetQueue::ItemsetQueue()': 
ItemsetQueue.c:(.text+0x0): multiple definition of `minit::ItemsetQueue::ItemsetQueue()' 
minit:(.text+0x390): first defined here 
/tmp/ccQhesuV.o: In function `minit::ItemsetQueue::enqueue(unsigned int const&, unsigned int)': 
ItemsetQueue.c:(.text+0x7e): multiple definition of `minit::ItemsetQueue::enqueue(unsigned int const&, unsigned int)' 
minit:(.text+0x430): first defined here 
/tmp/ccQhesuV.o: In function `minit::ItemsetQueue::enqueue(minit::Itemset const&, unsigned int const&, unsigned int)': 
ItemsetQueue.c:(.text+0xfe): multiple definition of `minit::ItemsetQueue::enqueue(minit::Itemset const&, unsigned int const&, unsigned int)' 
minit:(.text+0x520): first defined here 
/tmp/ccQhesuV.o: In function `minit::ItemsetQueue::dequeue()': 
ItemsetQueue.c:(.text+0x186): multiple definition of `minit::ItemsetQueue::dequeue()' 
minit:(.text+0x3b0): first defined here 
/tmp/ccQhesuV.o: In function `minit::ItemsetQueue::print(std::basic_ostream<char, std::char_traits<char> >&) const': 
ItemsetQueue.c:(.text+0x1f2): multiple definition of `minit::ItemsetQueue::print(std::basic_ostream<char, std::char_traits<char> >&) const' 
minit:(.text+0x6d0): first defined here 
/tmp/ccQhesuV.o: In function `minit::ItemsetQueue::printItemsets(std::basic_ostream<char, std::char_traits<char> >&) const': 
ItemsetQueue.c:(.text+0x306): multiple definition of `minit::ItemsetQueue::printItemsets(std::basic_ostream<char, std::char_traits<char> >&) const' 
minit:(.text+0xa60): first defined here 
/tmp/ccQhesuV.o: In function `minit::ItemsetQueue::ItemsetQueue()': 
ItemsetQueue.c:(.text+0x0): multiple definition of `minit::ItemsetQueue::ItemsetQueue()' 
minit:(.text+0x390): first defined here 
/tmp/cc6ZqTIl.o: In function `minit::Transaction::readTransaction(std::basic_istream<char, std::char_traits<char> >&)': 
Transaction.c:(.text+0x0): multiple definition of `minit::Transaction::readTransaction(std::basic_istream<char, std::char_traits<char> >&)' 
minit:(.text+0x16b0): first defined here 
/tmp/cc6ZqTIl.o: In function `minit::Transaction::readValue(std::basic_istream<char, std::char_traits<char> >&)': 
Transaction.c:(.text+0x14a): multiple definition of `minit::Transaction::readValue(std::basic_istream<char, std::char_traits<char> >&)' 
minit:(.text+0x15b0): first defined here 
/tmp/ccZandoO.o: In function `minit::Dataset::Dataset(std::basic_string<char, std::char_traits<char>, std::allocator<char> >)': 
Dataset.c:(.text+0x0): multiple definition of `minit::Dataset::Dataset(std::basic_string<char, std::char_traits<char>, std::allocator<char> >)' 
minit:(.text+0x29b0): first defined here 
/tmp/ccZandoO.o: In function `minit::Dataset::readDataset(std::basic_istream<char, std::char_traits<char> >&)': 
Dataset.c:(.text+0x644): multiple definition of `minit::Dataset::readDataset(std::basic_istream<char, std::char_traits<char> >&)' 
minit:(.text+0x2350): first defined here 
/tmp/ccZandoO.o: In function `minit::Dataset::~Dataset()': 
Dataset.c:(.text+0x512): multiple definition of `minit::Dataset::~Dataset()' 
minit:(.text+0x1af0): first defined here 
/tmp/ccZandoO.o: In function `minit::Dataset::toString() const': 
Dataset.c:(.text+0x7f0): multiple definition of `minit::Dataset::toString() const' 
minit:(.text+0x1c00): first defined here 
/tmp/ccZandoO.o: In function `minit::Dataset::printColumnInfo()': 
Dataset.c:(.text+0x9d6): multiple definition of `minit::Dataset::printColumnInfo()' 
minit:(.text+0x2200): first defined here 
/tmp/ccZandoO.o: In function `minit::Dataset::Dataset(std::basic_string<char, std::char_traits<char>, std::allocator<char> >)': 
Dataset.c:(.text+0x0): multiple definition of `minit::Dataset::Dataset(std::basic_string<char, std::char_traits<char>, std::allocator<char> >)' 
minit:(.text+0x29b0): first defined here 
/tmp/ccZandoO.o: In function `minit::Dataset::~Dataset()': 
Dataset.c:(.text+0x512): multiple definition of `minit::Dataset::~Dataset()' 
minit:(.text+0x1af0): first defined here 
/tmp/cc3PBOXh.o: In function `minit::SubDataset::SubDataset(minit::Dataset const&)': 
SubDataset.c:(.text+0x0): multiple definition of `minit::SubDataset::SubDataset(minit::Dataset const&)' 
minit:(.text+0x3c20): first defined here 
/tmp/cc3PBOXh.o:(.bss+0x0): multiple definition of `minit::SubDataset::count' 
minit:(.bss+0x670): first defined here 
/tmp/cc3PBOXh.o:(.bss+0x10): multiple definition of `minit::SubDataset::preComputeCallsPerMaxc' 
minit:(.bss+0x650): first defined here 
/tmp/cc3PBOXh.o: In function `minit::SubDataset::SubDataset(minit::SubDataset const&)': 
SubDataset.c:(.text+0x11a): multiple definition of `minit::SubDataset::SubDataset(minit::SubDataset const&)' 
minit:(.text+0x3360): first defined here 
/tmp/cc3PBOXh.o: In function `minit::SubDataset::~SubDataset()': 
SubDataset.c:(.text+0x1b8): multiple definition of `minit::SubDataset::~SubDataset()' 
minit:(.text+0x33f0): first defined here 
/tmp/cc3PBOXh.o: In function `minit::SubDataset::~SubDataset()': 
SubDataset.c:(.text+0x1b8): multiple definition of `minit::SubDataset::~SubDataset()' 
minit:(.text+0x33f0): first defined here 
/tmp/cc3PBOXh.o: In function `minit::SubDataset::supportSet(unsigned int) const': 
SubDataset.c:(.text+0x242): multiple definition of `minit::SubDataset::supportSet(unsigned int) const' 
minit:(.text+0x33a0): first defined here 
/tmp/cc3PBOXh.o: In function `minit::SubDataset::preComputeSupportSets(minit::RankItems const&, int, int, int)': 
SubDataset.c:(.text+0x2ac): multiple definition of `minit::SubDataset::preComputeSupportSets(minit::RankItems const&, int, int, int)' 
minit:(.text+0x40d0): first defined here 
/tmp/cc3PBOXh.o: In function `minit::SubDataset::preComputeSupportSetsLeafNode(minit::RankItems const&, unsigned int, unsigned int)': 
SubDataset.c:(.text+0x514): multiple definition of `minit::SubDataset::preComputeSupportSetsLeafNode(minit::RankItems const&, unsigned int, unsigned int)' 
minit:(.text+0x3f30): first defined here 
/tmp/cc3PBOXh.o: In function `minit::SubDataset::SubDataset(minit::SubDataset const&)': 
SubDataset.c:(.text+0x11a): multiple definition of `minit::SubDataset::SubDataset(minit::SubDataset const&)' 
minit:(.text+0x3360): first defined here 
/tmp/cc3PBOXh.o: In function `minit::SubDataset::doneWithAnchorItem(unsigned int const&)': 
SubDataset.c:(.text+0x6a0): multiple definition of `minit::SubDataset::doneWithAnchorItem(unsigned int const&)' 
minit:(.text+0x37e0): first defined here 
/tmp/cc3PBOXh.o: In function `minit::SubDataset::SubDataset(minit::Dataset const&)': 
SubDataset.c:(.text+0x0): multiple definition of `minit::SubDataset::SubDataset(minit::Dataset const&)' 
minit:(.text+0x3c20): first defined here 
/tmp/ccWMQMqM.o: In function `minit::RankItems::RankItems(minit::Dataset const&)': 
RankItems.c:(.text+0x0): multiple definition of `minit::RankItems::RankItems(minit::Dataset const&)' 
minit:(.text+0x56c0): first defined here 
/tmp/ccWMQMqM.o:(.bss+0x0): multiple definition of `minit::RankItems::count' 
minit:(.bss+0x680): first defined here 
/tmp/ccWMQMqM.o: In function `minit::RankItems::RankItems(minit::SubDataset&, int, minit::RankItems const&, int, unsigned int)': 
RankItems.c:(.text+0x1fa): multiple definition of `minit::RankItems::RankItems(minit::SubDataset&, int, minit::RankItems const&, int, unsigned int)' 
minit:(.text+0x5990): first defined here 
/tmp/ccWMQMqM.o: In function `minit::RankItems::toString() const': 
RankItems.c:(.text+0x4e0): multiple definition of `minit::RankItems::toString() const' 
minit:(.text+0x5130): first defined here 
/tmp/ccWMQMqM.o: In function `minit::RankItems::RankItems(minit::Dataset const&)': 
RankItems.c:(.text+0x0): multiple definition of `minit::RankItems::RankItems(minit::Dataset const&)' 
minit:(.text+0x56c0): first defined here 
/tmp/ccWMQMqM.o: In function `minit::RankItems::RankItems(minit::SubDataset&, int, minit::RankItems const&, int, unsigned int)': 
RankItems.c:(.text+0x1fa): multiple definition of `minit::RankItems::RankItems(minit::SubDataset&, int, minit::RankItems const&, int, unsigned int)' 
minit:(.text+0x5990): first defined here 
/tmp/ccDeL01h.o: In function `minit::MinitAlgo::MinitAlgo(std::basic_string<char, std::char_traits<char>, std::allocator<char> >)': 
MinitAlgo.c:(.text+0x0): multiple definition of `minit::MinitAlgo::MinitAlgo(std::basic_string<char, std::char_traits<char>, std::allocator<char> >)' 
minit:(.text+0x6eb0): first defined here 
/tmp/ccDeL01h.o: In function `minit::MinitAlgo::~MinitAlgo()': 
MinitAlgo.c:(.text+0x128): multiple definition of `minit::MinitAlgo::~MinitAlgo()' 
minit:(.text+0x6dc0): first defined here 
/tmp/ccDeL01h.o: In function `minit::MinitAlgo::search(int, int, bool)': 
MinitAlgo.c:(.text+0x1ee): multiple definition of `minit::MinitAlgo::search(int, int, bool)' 
minit:(.text+0x93f0): first defined here 
/tmp/ccDeL01h.o: In function `minit::MinitAlgo::minitRecursive(minit::SubDataset&, minit::RankItems const&, int, int)': 
MinitAlgo.c:(.text+0x6fc): multiple definition of `minit::MinitAlgo::minitRecursive(minit::SubDataset&, minit::RankItems const&, int, int)' 
minit:(.text+0x9860): first defined here 
/tmp/ccDeL01h.o: In function `minit::MinitAlgo::processMinII(int, unsigned int, unsigned int)': 
MinitAlgo.c:(.text+0x678): multiple definition of `minit::MinitAlgo::processMinII(int, unsigned int, unsigned int)' 
minit:(.text+0x6d70): first defined here 
/tmp/ccDeL01h.o: In function `minit::MinitAlgo::requiredSupportTransactionsExist(unsigned int const&, minit::Itemset const&, unsigned int const&, minit::SubDataset const&, int)': 
MinitAlgo.c:(.text+0x10f0): multiple definition of `minit::MinitAlgo::requiredSupportTransactionsExist(unsigned int const&, minit::Itemset const&, unsigned int const&, minit::SubDataset const&, int)' 
minit:(.text+0x6fe0): first defined here 
/tmp/ccDeL01h.o: In function `minit::MinitAlgo::MinitAlgo(std::basic_string<char, std::char_traits<char>, std::allocator<char> >)': 
MinitAlgo.c:(.text+0x0): multiple definition of `minit::MinitAlgo::MinitAlgo(std::basic_string<char, std::char_traits<char>, std::allocator<char> >)' 
minit:(.text+0x6eb0): first defined here 
/tmp/ccDeL01h.o: In function `minit::MinitAlgo::~MinitAlgo()': 
MinitAlgo.c:(.text+0x128): multiple definition of `minit::MinitAlgo::~MinitAlgo()' 
minit:(.text+0x6dc0): first defined here 
/usr/lib/gcc/x86_64-amazon-linux/4.6.3/crtend.o:(.dtors+0x0): multiple definition of `__DTOR_END__' 
minit:(.dtors+0x8): first defined here 
/usr/bin/ld: error in minit(.eh_frame); no .eh_frame_hdr table will be created. 
collect2: ld returned 1 exit status 
[[email protected] minit++]$ 
[[email protected] minit++]$ g++ -o -O0 minit minit.c MinitGlobal.h Item.c ItemsetQueue.c Transaction.c Error.h Dataset.c SubDataset.c RankItems.c MinitAlgo.c 
minit: In function `_start': 
(.text+0x2a8): multiple definition of `_start' 
/usr/lib/gcc/x86_64-amazon-linux/4.6.3/../../../../lib64/crt1.o:(.text+0x0): first defined here 
minit: In function `_fini': 
(.fini+0x0): multiple definition of `_fini' 
/usr/lib/gcc/x86_64-amazon-linux/4.6.3/../../../../lib64/crti.o:(.fini+0x0): first defined here 
minit:(.rodata+0x0): multiple definition of `_IO_stdin_used' 
/usr/lib/gcc/x86_64-amazon-linux/4.6.3/../../../../lib64/crt1.o:(.rodata.cst4+0x0): first defined here 
minit: In function `__data_start': 
(.data+0x0): multiple definition of `__data_start' 
/usr/lib/gcc/x86_64-amazon-linux/4.6.3/../../../../lib64/crt1.o:(.data+0x0): first defined here 
minit:(.rodata+0x8): multiple definition of `__dso_handle' 
/usr/lib/gcc/x86_64-amazon-linux/4.6.3/crtbegin.o:(.rodata+0x0): first defined here 
minit: In function `_init': 
(.init+0x0): multiple definition of `_init' 
/usr/lib/gcc/x86_64-amazon-linux/4.6.3/../../../../lib64/crti.o:(.init+0x0): first defined here 
/tmp/cc0cvoT6.o: In function `main': 
minit.c:(.text+0x4d2): multiple definition of `main' 
minit:(.text+0x0): first defined here 
/tmp/ccRfRvQv.o:(.bss+0x0): multiple definition of `minit::Itemset::count' 
minit:(.bss+0x638): first defined here 
/tmp/ccQhesuV.o: In function `minit::ItemsetQueue::ItemsetQueue()': 
ItemsetQueue.c:(.text+0x0): multiple definition of `minit::ItemsetQueue::ItemsetQueue()' 
minit:(.text+0x390): first defined here 
/tmp/ccQhesuV.o: In function `minit::ItemsetQueue::enqueue(unsigned int const&, unsigned int)': 
ItemsetQueue.c:(.text+0x7e): multiple definition of `minit::ItemsetQueue::enqueue(unsigned int const&, unsigned int)' 
minit:(.text+0x430): first defined here 
/tmp/ccQhesuV.o: In function `minit::ItemsetQueue::enqueue(minit::Itemset const&, unsigned int const&, unsigned int)': 
ItemsetQueue.c:(.text+0xfe): multiple definition of `minit::ItemsetQueue::enqueue(minit::Itemset const&, unsigned int const&, unsigned int)' 
minit:(.text+0x520): first defined here 
/tmp/ccQhesuV.o: In function `minit::ItemsetQueue::dequeue()': 
ItemsetQueue.c:(.text+0x186): multiple definition of `minit::ItemsetQueue::dequeue()' 
minit:(.text+0x3b0): first defined here 
/tmp/ccQhesuV.o: In function `minit::ItemsetQueue::print(std::basic_ostream<char, std::char_traits<char> >&) const': 
ItemsetQueue.c:(.text+0x1f2): multiple definition of `minit::ItemsetQueue::print(std::basic_ostream<char, std::char_traits<char> >&) const' 
minit:(.text+0x6d0): first defined here 
/tmp/ccQhesuV.o: In function `minit::ItemsetQueue::printItemsets(std::basic_ostream<char, std::char_traits<char> >&) const': 
ItemsetQueue.c:(.text+0x306): multiple definition of `minit::ItemsetQueue::printItemsets(std::basic_ostream<char, std::char_traits<char> >&) const' 
minit:(.text+0xa60): first defined here 
/tmp/ccQhesuV.o: In function `minit::ItemsetQueue::ItemsetQueue()': 
ItemsetQueue.c:(.text+0x0): multiple definition of `minit::ItemsetQueue::ItemsetQueue()' 
minit:(.text+0x390): first defined here 
/tmp/cc6ZqTIl.o: In function `minit::Transaction::readTransaction(std::basic_istream<char, std::char_traits<char> >&)': 
Transaction.c:(.text+0x0): multiple definition of `minit::Transaction::readTransaction(std::basic_istream<char, std::char_traits<char> >&)' 
minit:(.text+0x16b0): first defined here 
/tmp/cc6ZqTIl.o: In function `minit::Transaction::readValue(std::basic_istream<char, std::char_traits<char> >&)': 
Transaction.c:(.text+0x14a): multiple definition of `minit::Transaction::readValue(std::basic_istream<char, std::char_traits<char> >&)' 
minit:(.text+0x15b0): first defined here 
/tmp/ccZandoO.o: In function `minit::Dataset::Dataset(std::basic_string<char, std::char_traits<char>, std::allocator<char> >)': 
Dataset.c:(.text+0x0): multiple definition of `minit::Dataset::Dataset(std::basic_string<char, std::char_traits<char>, std::allocator<char> >)' 
minit:(.text+0x29b0): first defined here 
/tmp/ccZandoO.o: In function `minit::Dataset::readDataset(std::basic_istream<char, std::char_traits<char> >&)': 
Dataset.c:(.text+0x644): multiple definition of `minit::Dataset::readDataset(std::basic_istream<char, std::char_traits<char> >&)' 
minit:(.text+0x2350): first defined here 
/tmp/ccZandoO.o: In function `minit::Dataset::~Dataset()': 
Dataset.c:(.text+0x512): multiple definition of `minit::Dataset::~Dataset()' 
minit:(.text+0x1af0): first defined here 
/tmp/ccZandoO.o: In function `minit::Dataset::toString() const': 
Dataset.c:(.text+0x7f0): multiple definition of `minit::Dataset::toString() const' 
minit:(.text+0x1c00): first defined here 
/tmp/ccZandoO.o: In function `minit::Dataset::printColumnInfo()': 
Dataset.c:(.text+0x9d6): multiple definition of `minit::Dataset::printColumnInfo()' 
minit:(.text+0x2200): first defined here 
/tmp/ccZandoO.o: In function `minit::Dataset::Dataset(std::basic_string<char, std::char_traits<char>, std::allocator<char> >)': 
Dataset.c:(.text+0x0): multiple definition of `minit::Dataset::Dataset(std::basic_string<char, std::char_traits<char>, std::allocator<char> >)' 
minit:(.text+0x29b0): first defined here 
/tmp/ccZandoO.o: In function `minit::Dataset::~Dataset()': 
Dataset.c:(.text+0x512): multiple definition of `minit::Dataset::~Dataset()' 
minit:(.text+0x1af0): first defined here 
/tmp/cc3PBOXh.o: In function `minit::SubDataset::SubDataset(minit::Dataset const&)': 
SubDataset.c:(.text+0x0): multiple definition of `minit::SubDataset::SubDataset(minit::Dataset const&)' 
minit:(.text+0x3c20): first defined here 
/tmp/cc3PBOXh.o:(.bss+0x0): multiple definition of `minit::SubDataset::count' 
minit:(.bss+0x670): first defined here 
/tmp/cc3PBOXh.o:(.bss+0x10): multiple definition of `minit::SubDataset::preComputeCallsPerMaxc' 
minit:(.bss+0x650): first defined here 
/tmp/cc3PBOXh.o: In function `minit::SubDataset::SubDataset(minit::SubDataset const&)': 
SubDataset.c:(.text+0x11a): multiple definition of `minit::SubDataset::SubDataset(minit::SubDataset const&)' 
minit:(.text+0x3360): first defined here 
/tmp/cc3PBOXh.o: In function `minit::SubDataset::~SubDataset()': 
SubDataset.c:(.text+0x1b8): multiple definition of `minit::SubDataset::~SubDataset()' 
minit:(.text+0x33f0): first defined here 
/tmp/cc3PBOXh.o: In function `minit::SubDataset::~SubDataset()': 
SubDataset.c:(.text+0x1b8): multiple definition of `minit::SubDataset::~SubDataset()' 
minit:(.text+0x33f0): first defined here 
/tmp/cc3PBOXh.o: In function `minit::SubDataset::supportSet(unsigned int) const': 
SubDataset.c:(.text+0x242): multiple definition of `minit::SubDataset::supportSet(unsigned int) const' 
minit:(.text+0x33a0): first defined here 
/tmp/cc3PBOXh.o: In function `minit::SubDataset::preComputeSupportSets(minit::RankItems const&, int, int, int)': 
SubDataset.c:(.text+0x2ac): multiple definition of `minit::SubDataset::preComputeSupportSets(minit::RankItems const&, int, int, int)' 
minit:(.text+0x40d0): first defined here 
/tmp/cc3PBOXh.o: In function `minit::SubDataset::preComputeSupportSetsLeafNode(minit::RankItems const&, unsigned int, unsigned int)': 
SubDataset.c:(.text+0x514): multiple definition of `minit::SubDataset::preComputeSupportSetsLeafNode(minit::RankItems const&, unsigned int, unsigned int)' 
minit:(.text+0x3f30): first defined here 
/tmp/cc3PBOXh.o: In function `minit::SubDataset::SubDataset(minit::SubDataset const&)': 
SubDataset.c:(.text+0x11a): multiple definition of `minit::SubDataset::SubDataset(minit::SubDataset const&)' 
minit:(.text+0x3360): first defined here 
/tmp/cc3PBOXh.o: In function `minit::SubDataset::doneWithAnchorItem(unsigned int const&)': 
SubDataset.c:(.text+0x6a0): multiple definition of `minit::SubDataset::doneWithAnchorItem(unsigned int const&)' 
minit:(.text+0x37e0): first defined here 
/tmp/cc3PBOXh.o: In function `minit::SubDataset::SubDataset(minit::Dataset const&)': 
SubDataset.c:(.text+0x0): multiple definition of `minit::SubDataset::SubDataset(minit::Dataset const&)' 
minit:(.text+0x3c20): first defined here 
/tmp/ccWMQMqM.o: In function `minit::RankItems::RankItems(minit::Dataset const&)': 
RankItems.c:(.text+0x0): multiple definition of `minit::RankItems::RankItems(minit::Dataset const&)' 
minit:(.text+0x56c0): first defined here 
/tmp/ccWMQMqM.o:(.bss+0x0): multiple definition of `minit::RankItems::count' 
minit:(.bss+0x680): first defined here 
/tmp/ccWMQMqM.o: In function `minit::RankItems::RankItems(minit::SubDataset&, int, minit::RankItems const&, int, unsigned int)': 
RankItems.c:(.text+0x1fa): multiple definition of `minit::RankItems::RankItems(minit::SubDataset&, int, minit::RankItems const&, int, unsigned int)' 
minit:(.text+0x5990): first defined here 
/tmp/ccWMQMqM.o: In function `minit::RankItems::toString() const': 
RankItems.c:(.text+0x4e0): multiple definition of `minit::RankItems::toString() const' 
minit:(.text+0x5130): first defined here 
/tmp/ccWMQMqM.o: In function `minit::RankItems::RankItems(minit::Dataset const&)': 
RankItems.c:(.text+0x0): multiple definition of `minit::RankItems::RankItems(minit::Dataset const&)' 
minit:(.text+0x56c0): first defined here 
/tmp/ccWMQMqM.o: In function `minit::RankItems::RankItems(minit::SubDataset&, int, minit::RankItems const&, int, unsigned int)': 
RankItems.c:(.text+0x1fa): multiple definition of `minit::RankItems::RankItems(minit::SubDataset&, int, minit::RankItems const&, int, unsigned int)' 
minit:(.text+0x5990): first defined here 
/tmp/ccDeL01h.o: In function `minit::MinitAlgo::MinitAlgo(std::basic_string<char, std::char_traits<char>, std::allocator<char> >)': 
MinitAlgo.c:(.text+0x0): multiple definition of `minit::MinitAlgo::MinitAlgo(std::basic_string<char, std::char_traits<char>, std::allocator<char> >)' 
minit:(.text+0x6eb0): first defined here 
/tmp/ccDeL01h.o: In function `minit::MinitAlgo::~MinitAlgo()': 
MinitAlgo.c:(.text+0x128): multiple definition of `minit::MinitAlgo::~MinitAlgo()' 
minit:(.text+0x6dc0): first defined here 
/tmp/ccDeL01h.o: In function `minit::MinitAlgo::search(int, int, bool)': 
MinitAlgo.c:(.text+0x1ee): multiple definition of `minit::MinitAlgo::search(int, int, bool)' 
minit:(.text+0x93f0): first defined here 
/tmp/ccDeL01h.o: In function `minit::MinitAlgo::minitRecursive(minit::SubDataset&, minit::RankItems const&, int, int)': 
MinitAlgo.c:(.text+0x6fc): multiple definition of `minit::MinitAlgo::minitRecursive(minit::SubDataset&, minit::RankItems const&, int, int)' 
minit:(.text+0x9860): first defined here 
/tmp/ccDeL01h.o: In function `minit::MinitAlgo::processMinII(int, unsigned int, unsigned int)': 
MinitAlgo.c:(.text+0x678): multiple definition of `minit::MinitAlgo::processMinII(int, unsigned int, unsigned int)' 
minit:(.text+0x6d70): first defined here 
/tmp/ccDeL01h.o: In function `minit::MinitAlgo::requiredSupportTransactionsExist(unsigned int const&, minit::Itemset const&, unsigned int const&, minit::SubDataset const&, int)': 
MinitAlgo.c:(.text+0x10f0): multiple definition of `minit::MinitAlgo::requiredSupportTransactionsExist(unsigned int const&, minit::Itemset const&, unsigned int const&, minit::SubDataset const&, int)' 
minit:(.text+0x6fe0): first defined here 
/tmp/ccDeL01h.o: In function `minit::MinitAlgo::MinitAlgo(std::basic_string<char, std::char_traits<char>, std::allocator<char> >)': 
MinitAlgo.c:(.text+0x0): multiple definition of `minit::MinitAlgo::MinitAlgo(std::basic_string<char, std::char_traits<char>, std::allocator<char> >)' 
minit:(.text+0x6eb0): first defined here 
/tmp/ccDeL01h.o: In function `minit::MinitAlgo::~MinitAlgo()': 
MinitAlgo.c:(.text+0x128): multiple definition of `minit::MinitAlgo::~MinitAlgo()' 
minit:(.text+0x6dc0): first defined here 
/usr/lib/gcc/x86_64-amazon-linux/4.6.3/crtend.o:(.dtors+0x0): multiple definition of `__DTOR_END__' 
minit:(.dtors+0x8): first defined here 
/usr/bin/ld: error in minit(.eh_frame); no .eh_frame_hdr table will be created. 
collect2: ld returned 1 exit status 
[[email protected] minit++]$
經常死機。。所有的錯誤都是「多重定義」的，你能否建議如何解決這個問題？
來源
2013-11-15 user2651246
gcc/g++預期在-o之後直接輸出文件的名稱。您混淆了參數順序：
而不是g++ -o -O0 minit ...嘗試g++ -O0 -o minit ...。
g++試圖將可執行文件minit與對象文件鏈接到一個程序集中，這就是爲什麼會出現這些錯誤。
來源
2013-11-15 10:07:41 Neet
它的工作，謝謝！你知道什麼是最高的（最好的是它提供了最快的代碼）級別，「-O5」？ – user2651246
推薦使用'-O3'。 – Neet
您可以在這裏閱讀更多關於這些選項的信息：http://gcc.gnu.org/onlinedocs/gcc/Optimize-Options.html「最快的代碼」取決於很多事情，因此不同的設置可能會更快一些代碼而不是其他代碼。一般來說-O3是一個非常安全的選擇，但如果你願意，你可以針對-O2和-Os進行配置。 –
與優化級別編譯C++項目

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