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Asked: 2026-05-26T07:05:25+00:00

I am getting the following errors after an upgrade. I cannot figure what is

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I am getting the following errors after an upgrade. I cannot figure what is wrong with it. It should work as far as I can see.

$ make 2>&1 | head
g++ -o prog -ansi -O2 -Wall -I/usr/include/boost -L/usr/lib -lboost_program_options -lboost_thread -lstdc++ ./YYY.o ./main.o ./myClass.o
./YYY.o: In function `void boost::call_once<void (*)()>(boost::once_flag&, void (*)())':
YYY.cc:(.text._ZN5boost9call_onceIPFvvEEEvRNS_9once_flagET_[void boost::call_once<void (*)()>(boost::once_flag&, void (*)())]+0x14): undefined reference to `boost::detail::get_once_per_thread_epoch()'
YYY.cc:(.text._ZN5boost9call_onceIPFvvEEEvRNS_9once_flagET_[void boost::call_once<void (*)()>(boost::once_flag&, void (*)())]+0x2c): undefined reference to `boost::detail::once_epoch_mutex'
YYY.cc:(.text._ZN5boost9call_onceIPFvvEEEvRNS_9once_flagET_[void boost::call_once<void (*)()>(boost::once_flag&, void (*)())]+0x62): undefined reference to `boost::detail::once_epoch_mutex'
YYY.cc:(.text._ZN5boost9call_onceIPFvvEEEvRNS_9once_flagET_[void boost::call_once<void (*)()>(boost::once_flag&, void (*)())]+0x67): undefined reference to `boost::detail::once_epoch_cv'
YYY.cc:(.text._ZN5boost9call_onceIPFvvEEEvRNS_9once_flagET_[void boost::call_once<void (*)()>(boost::once_flag&, void (*)())]+0x95): undefined reference to `boost::detail::once_epoch_mutex'
YYY.cc:(.text._ZN5boost9call_onceIPFvvEEEvRNS_9once_flagET_[void boost::call_once<void (*)()>(boost::once_flag&, void (*)())]+0xa9): undefined reference to `boost::detail::once_epoch_mutex'
YYY.cc:(.text._ZN5boost9call_onceIPFvvEEEvRNS_9once_flagET_[void boost::call_once<void (*)()>(boost::once_flag&, void (*)())]+0xbd): undefined reference to `boost::detail::once_global_epoch'
YYY.cc:(.text._ZN5boost9call_onceIPFvvEEEvRNS_9once_flagET_[void boost::call_once<void (*)()>(boost::once_flag&, void (*)())]+0xc2): undefined reference to `boost::detail::once_epoch_cv'

$ ls -l /usr/lib/*boost_threa*
   0 lrwxrwxrwx 1 root root   17 Jun  3 22:30 /usr/lib/libboost_thread-mt.a -> libboost_thread.a
   0 lrwxrwxrwx 1 root root   25 Jun  3 22:30 /usr/lib/libboost_thread-mt.so -> libboost_thread.so.1.46.1
208K -rw-r--r-- 1 root root 208K Jun  3 22:30 /usr/lib/libboost_thread.a
   0 lrwxrwxrwx 1 root root   25 Jun  3 22:30 /usr/lib/libboost_thread.so -> libboost_thread.so.1.46.1
 88K -rw-r--r-- 1 root root  87K Oct 21  2010 /usr/lib/libboost_thread.so.1.42.0
100K -rw-r--r-- 1 root root  99K Jun  3 22:30 /usr/lib/libboost_thread.so.1.46.1

$ ls -ld /usr/include/boost/*thread*
4.0K drwxr-xr-x 5 root root 4.0K Oct 13 21:59 /usr/include/boost/thread/
4.0K -rw-r--r-- 1 root root  839 Jun  3 22:18 /usr/include/boost/thread.hpp
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1 Answer

  1. Editorial Team

    The solution involved changing the order of linkage, as per the man page. The thing is that it used to work fine with an older version of g++… 

    $ make
g++ -I/usr/include/boost -MM ./YYY.cc ./main.cc ./myClass.cc > buildfiles.d
g++ -ansi -O2 -Wall -I/usr/include/boost   -c -o main.o main.cc
g++ -ansi -O2 -Wall -I/usr/include/boost   -c -o myClass.o myClass.cc
g++ -o prog -ansi -O2 -Wall -I/usr/include/boost  ./YYY.o ./main.o ./myClass.o -lstdc++ -L/usr/lib -lboost_program_options -lboost_thread
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