CODEWITHSUNDEEP
c++boostvisual-studio-2010lnk2001
Bob-GlueTools
Bob-GlueTools

Reputation: 127

specific LNK2001 error with boost::filesystem and VC++2010

I am stumped on this one.

I have some cross platform code that I am trying to compile with Win7 x64. The code uses Boost 1.54.0, specifically the boost::filesystem library.

The vast majority of my code compiles except for a few function calls when trying to assign strings to a filesystem::path.

For example, if I were to do something as simple as:

string path = (char *)"/This/Is/A/Fake/Path";
filesystem::path boostpath = path;

I get the following during the link stage:

LNK2001: unresolved external symbol "void __cdecl boost::filesystem::path_traits::convert(unsigned short const *,unsigned short const *,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > &,class std::codecvt<unsigned short,char,int> const &)" (?convert@path_traits@filesystem@boost@@$$FYAXPEBG0AEAV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@AEBV?$codecvt@GDH@5@@Z)

I have no idea what is causing this. Other boost libraries, (and Filesystem calls) work just fine! The only thing that I can think of, is there is something going on with Wide Characters and Windows. Searching around stackoverflow hasn't turned up anything that I can find. The link error itself seems to related to string conversion.

Naturally, this works on Linux/MacOSX.

Thanks in advance!

bob.

Upvotes: 0

Views: 612

Answers (1)

Bob-GlueTools
Bob-GlueTools

Reputation: 127

I finally got boost to work with the the the /Zc:wchar_t- switch. This involved editing the "msvc.jam" file. This file is located in your boost source folder.

The path is: your-boost-path/boost_1_54_0/tools/build/v2/tools/msvc.jam

I searched for wchar_t which turned up the /Zc:wchar_t flag. I altered the flag by changing it be /Zc:wchar_t-.

The updated line looks like this:

 toolset.flags $(toolset).compile CFLAGS $(conditions) : /Zc:forScope /Zc:wchar_t- ;

I then compiled boost using the following command line. (I used these flags specifically for my needs.)

bjam --toolset=msvc-10.0 architecture=x86 threading=multi link=static address-model=64 --build-type=complete install --prefix=C:\local\boost

Once compiled, I gave my project a shot and it seems to work! I haven't done any serious testing yet, but it seems to compile.

Note: Switching the wchar_t flag resulted in a lot of compiler warnings, and a few failures. While I am not using every package that boost offers, I hope that the ones that I need are ok.

Bob..

Upvotes: 1

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