error: template with C linkage

This is a discussion on error: template with C linkage within the C++ Programming forums, part of the General Programming Boards category; Hi I am trying to build a project at the moment. However, I currently get a mass of "error template ...

  1. #1
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    error: template with C linkage

    Hi

    I am trying to build a project at the moment. However, I currently get a mass of "error template with C linkage" errors. They appear to relate to the GNU ISO C++ library.

    The full list of messages is attached. Most of the problems seem to be with the standard libraries. This all compiled and linked perfectly a few days ago with the same include files (apart from <vector>, I think), although <map> was included.

    Foolishly I do not have an earlier version to revert to!

    Anyway, the fulll build output is as follows:

    Code:
    Building the whole Project: mrmCalcEngine ...
    make
    make  all-recursive
    make[1]: Entering directory `/home/miker/Projects/mrmCalcEngine'
    Making all in include
    make[2]: Entering directory `/home/miker/Projects/mrmCalcEngine/include'
    make[2]: Nothing to be done for `all'.
    make[2]: Leaving directory `/home/miker/Projects/mrmCalcEngine/include'
    Making all in src
    make[2]: Entering directory `/home/miker/Projects/mrmCalcEngine/src'
    if g++ -DHAVE_CONFIG_H -I. -I. -I.. -I/usr/local/include/mysql++ -I/home/miker/Projects/mrmCalcEngine/include -I/usr/local/mysql/include/mysql   -Wall -g -g -O2 -MT main.o -MD -MP -MF ".deps/main.Tpo" -c -o main.o main.cc; \
    then mv -f ".deps/main.Tpo" ".deps/main.Po"; else rm -f ".deps/main.Tpo"; exit 1; fi/usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_tree.h:131: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_tree.h:142: error: declaration of C function ‘const std::_Rb_tree_node_base* std::_Rb_tree_increment(const std::_Rb_tree_node_base*)’ conflicts with
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_tree.h:139: error: previous declaration ‘std::_Rb_tree_node_base* std::_Rb_tree_increment(std::_Rb_tree_node_base*)’ here
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_tree.h:148: error: declaration of C function ‘const std::_Rb_tree_node_base* std::_Rb_tree_decrement(const std::_Rb_tree_node_base*)’ conflicts with
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_tree.h:145: error: previous declaration ‘std::_Rb_tree_node_base* std::_Rb_tree_decrement(std::_Rb_tree_node_base*)’ here
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_tree.h:150: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_tree.h:219: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_tree.h:293: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_tree.h:299: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_tree.h:324: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_tree.h:707: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_tree.h:717: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_tree.h:727: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_tree.h:734: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_tree.h:741: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_tree.h:748: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_tree.h:755: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_tree.h:762: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_tree.h:784: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_tree.h:802: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_tree.h:819: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_tree.h:864: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_tree.h:891: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_tree.h:948: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_tree.h:1002: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_tree.h:1013: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_tree.h:1024: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_tree.h:1038: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_tree.h:1050: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_tree.h:1086: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_tree.h:1102: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_tree.h:1115: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_tree.h:1125: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_tree.h:1146: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_tree.h:1168: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_tree.h:1179: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_tree.h:1197: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_tree.h:1215: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_tree.h:1233: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_tree.h:1251: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_tree.h:1261: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_tree.h:1276: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_map.h:89: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_map.h:636: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_map.h:653: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_map.h:660: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_map.h:667: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_map.h:674: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_map.h:681: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_map.h:688: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_multimap.h:70: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_multimap.h:75: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_multimap.h:80: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_multimap.h:106: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_multimap.h:618: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_multimap.h:635: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_multimap.h:642: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_multimap.h:649: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_multimap.h:656: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_multimap.h:663: error: template with C linkage
    /usr/lib/gcc/x86_64-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_multimap.h:670: error: template with C linkage
    make[2]: *** [main.o] Error 1
    make[2]: Leaving directory `/home/miker/Projects/mrmCalcEngine/src'
    make[1]: *** [all-recursive] Error 1
    make: *** [all] Error 2
    make[1]: Leaving directory `/home/miker/Projects/mrmCalcEngine'
    Completed ... unsuccessful
    Total time taken: 1 secs
    Thanks,

    Michael.

  2. #2
    C++ Witch laserlight's Avatar
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    Could it have something to do with extern "C" ?
    I am just speculating here, but maybe you used extern "C" around some template code, and since templates presumably require name mangling, the compiler/linker started complaining.

    Foolishly I do not have an earlier version to revert to!
    Tsk tsk, hope you have learnt your lesson and now use a proper revision control system.
    Quote Originally Posted by Bjarne Stroustrup (2000-10-14)
    I get maybe two dozen requests for help with some sort of programming or design problem every day. Most have more sense than to send me hundreds of lines of code. If they do, I ask them to find the smallest example that exhibits the problem and send me that. Mostly, they then find the error themselves. "Finding the smallest program that demonstrates the error" is a powerful debugging tool.
    Look up a C++ Reference and learn How To Ask Questions The Smart Way

  3. #3
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    Thanks laserlight - that was my initial thought but it does not appear to do anything... However, I have sorted the problem out by getting #include <map> out of my main.cc file... I really don't know why this should make any difference! Must be something to do with templates.

    As for version control, I did not really think of this as a new version, I had just added a few functions, without any changes of significance (so I thought), just a couple of added include files!

    Being in the middle of a serious bad hair day, this has thrown up another, very odd problem... which I have put in a new thread!

  4. #4
    C++ Witch laserlight's Avatar
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    As for version control, I did not really think of this as a new version, I had just added a few functions, without any changes of significance (so I thought), just a couple of added include files!
    That's why version control is also called revision control, since you dont have to consider new 'versions' when you use it.
    Quote Originally Posted by Bjarne Stroustrup (2000-10-14)
    I get maybe two dozen requests for help with some sort of programming or design problem every day. Most have more sense than to send me hundreds of lines of code. If they do, I ask them to find the smallest example that exhibits the problem and send me that. Mostly, they then find the error themselves. "Finding the smallest program that demonstrates the error" is a powerful debugging tool.
    Look up a C++ Reference and learn How To Ask Questions The Smart Way

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