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c++xmlpugixml

Linking errors for pugixml in wchar mode

When I'm trying to build a binary using pugi in wchar mode, I get a load of linker undefined reference errors hinting at the lack of wchar_t versions of some functions in the library.

I'm using Ubuntu 16.04 and libpugixml-dev that I got from apt-get.

Here's an example code that refuses to build:

#include <pugixml.hpp>

int main(int argc, char *argv[])
{
    pugi::xml_node n;
    n.set_name(L"");

    return 0;
}

I build with

g++ -o pugi_test main.cpp -std=c++11 -DPUGIXML_WCHAR_MODE -lpugixml

and get

undefined reference to `pugi::xml_node::set_name(wchar_t const*)'

I also tried putting #define PUGIXML_WCHAR_MODE in main.cpp above #include, and uncommenting the same #define in pugiconfig.hpp.

If I remove all traces of wchar (L"" ⇒ "" and remove -DPUGIXML_WCHAR_MODE), build goes without a hitch.

Am I supposed to rebuild the library if I want to use wchar mode? I couldn't find anything of relevance in the manual.

Solution

  • Am I supposed to rebuild the library if I want to use wchar mode?

    Yes. It would make little sense to have such PUGIXML_WCHAR_MODE macro unless it controlled the compilation of the library (in my opinion). It must be (un-)defined both when compiling the library and the user of the library.