Re: [Boost-users] Failed Linking against Filesystem

From: Chris Miller (lordsauronthegreat_at_[hidden])
Date: 2007-11-22 22:31:35

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Chris Miller wrote:
> Same problem, however, now I'm certain it's just not linking against the
> filesystem libraries in boost.  I'm using EasyEclipse 3.3 CDT, and
> replaced the MinGW installation with the one from http://www.nuwen.net/,
> however, it still throws this error whenever I start to use the
> boost::filesystem API:
> 
> src\AppLayer\DirectoryTree.o:c:/mingw/bin/../lib/gcc/i686-pc-mingw32/4.2.1-dw2/../../../../include/boost/filesystem/operations.hpp:289:
> undefined reference to boost::filesystem::detail::status_api(std::string
> const&, unsigned int&)'
> src\AppLayer\DirectoryTree.o:c:/mingw/bin/../lib/gcc/i686-pc-mingw32/4.2.1-dw2/../../../../include/boost/filesystem/operations.hpp:279:
> undefined reference to boost::filesystem::detail::status_api(std::string
> const&, unsigned int&)'
> src\AppLayer\DirectoryTree.o:c:/mingw/bin/../lib/gcc/i686-pc-mingw32/4.2.1-dw2/../../../../include/boost/filesystem/operations.hpp:503:
> undefined reference to
> boost::filesystem::detail::get_current_path_api(std::string&)'
> 
> I'm fairly certain that I don't understand what's going on.  The library
> files for the filesystem API are right in the lib\ directory, right
> where they should be.  I think it might be that Eclipse isn't doing
> something correctly, however, I looked through the library paths in
> Eclipse and it looks to me as if everything is in order.
> 
> Any help would be awesome, thanks in advance for any help you can offer!

Hey I fixed the problem.  I found that the boost_filesystem.a file
wasn't being recognized by the MinGW Linker because it didn't have the
extension of .o

Rather than try something stupid like renaming the file, I added that
file to a list of "other objects" under the Eclipse CDT Linker
configuration settings located here:

Project Properties > C/C++ Build > Settings > MinGW C++ Linker >
Miscellaneous > Other Objects

Just documenting it for the list, and for my own purposes when I forget
and have to setup on another platform :)
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