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Re: gnu c++ linker errors on double processor machine


Bernd Prager wrote:

Hi everybody,

I'm experencing an odd error on a double processor machine.
The same source code compiles well on all boxes I used but on a single machine it fails.
It's the only 2-processor box I use. That's why I assume the problem is some weird concurrency issue but I'm not sure.


When I try to compile it a couple of times in a row sometimes compilation works, sometimes it fails and it's really abitrary.
Here's the error message:


> make all
Building target: Tst.exe
g++ -L/usr/local/lib -L/usr/local/lib/mysql -o Tst.exe Cfg.o Tst.o -lmysqlpp -lmysqlclient -lz
/usr/local/lib/libstdc++.a(tree.o)(.text$_ZSt20_Rb_tree_rotate_leftPSt18_Rb_tree_node_baseRS0_+0x0): In function `_ZSt20_Rb_tree_black_countPKSt18_Rb_tree_node_baseS1_':
/home/BerndPrager/gcc-3.4.3/i686-pc-cygwin/libstdc++-v3/src/../../.././libstdc++-v3/src/tree.cc:416: multiple definition of `std::_Rb_tree_rotate_left(std::_Rb_tree_node_base*, std::_Rb_tree_node_base*&)'
Cfg.o(.text$_ZSt20_Rb_tree_rotate_leftPSt18_Rb_tree_node_baseRS0_[std::_Rb_tree_rotate_left(std::_Rb_tree_node_base*, std::_Rb_tree_node_base*&)]+0x0):/usr/include/c++/3.3.3/bits/stl_construct.h: first defined here
/usr/local/lib/libstdc++.a(tree.o)(.text$_ZSt21_Rb_tree_rotate_rightPSt18_Rb_tree_node_baseRS0_+0x0): In function `_ZSt20_Rb_tree_black_countPKSt18_Rb_tree_node_baseS1_':
/home/BerndPrager/gcc-3.4.3/i686-pc-cygwin/libstdc++-v3/src/../../.././libstdc++-v3/src/tree.cc:416: multiple definition of `std::_Rb_tree_rotate_right(std::_Rb_tree_node_base*, std::_Rb_tree_node_base*&)'
Cfg.o(.text$_ZSt21_Rb_tree_rotate_rightPSt18_Rb_tree_node_baseRS0_[std::_Rb_tree_rotate_right(std::_Rb_tree_node_base*, std::_Rb_tree_node_base*&)]+0x0):/usr/include/c++/3.3.3/bits/stl_construct.h: first defined here
Cfg.o(.text$_ZNSt14__simple_allocISt13_Rb_tree_nodeISt4pairIKSsSsEESt24__default_alloc_templateILb1ELi0EEE8allocateEj[std::__simple_alloc<std::_Rb_tree_node<std::pair<std::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::basic_string<char, std::char_traits<char>, std::allocator<char> > > >, std::__default_alloc_template<true, 0> >::allocate(unsigned int)]+0x27): In function `_ZNKSt10_Select1stISt4pairIKSsSsEEclERKS2_':
/usr/include/c++/3.3.3/bits/stl_construct.h: undefined reference to `std::__default_alloc_template<true, 0>::allocate(unsigned int)'
Cfg.o(.text$_ZNSt14__simple_allocISt13_Rb_tree_nodeISt4pairIKSsSsEESt24__default_alloc_templateILb1ELi0EEE10deallocateEPS4_j[std::__simple_alloc<std::_Rb_tree_node<std::pair<std::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::basic_string<char, std::char_traits<char>, std::allocator<char> > > >, std::__default_alloc_template<true, 0> >::deallocate(std::_Rb_tree_node<std::pair<std::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::basic_string<char, std::char_traits<char>, std::allocator<char> > > >*, unsigned int)]+0x23):/usr/include/c++/3.3.3/bits/stl_construct.h: undefined reference to `std::__default_alloc_template<true, 0>::deallocate(void*, unsigned int)'
collect2: ld returned 1 exit status
make: *** [Tst.exe] Error 1


Is that a known issue? Some flags or cygwin variable I can set to prevent that?
It's a WinXP box, gcc 3.4.3, CYGWIN_NT-5.1 1.5.16(0.128/4/2).


Thanks in advane for any suggestions or help.

Are there other differences between this and the other machines?
E.g. you use distcc here but not elsewhere, you use make -j3 and not elsewhere, you use ccache here but not elesewhere, ...?



Gerrit -- =^..^=

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