Re: [Boost-users] [Filesystem] Symbol not found: boost::filesystem2::detail::status_api

Subject: Re: [Boost-users] [Filesystem] Symbol not found: boost::filesystem2::detail::status_api
From: Júlio Hoffimann (julio.hoffimann_at_[hidden])
Date: 2011-02-23 06:54:47

Hi Nicolas,

It's my first time using Boost, but i think you missed the build steps. The
Boost library is header-only, except this parts:

http://www.boost.org/doc/libs/1_46_0/more/getting_started/unix-variants.html#header-only-libraries

<http://www.boost.org/doc/libs/1_46_0/more/getting_started/unix-variants.html#header-only-libraries>For
example, i'm using Boost.MPI and Boost.Random, my bootstrap.sh call is
something like:

./bootstrap.sh --prefix=/your/desired/path --with-libraries=mpi,random

I think you need to pass Filesystem to bootstrap.sh before anything. Also is
a good idea read it's docs, because maybe you will need to edit some
specific configuration files like i did in Boost.MPI.

Regards,
Júlio.

2011/2/23 Nicolas Chaumont <nicolas.chaumont_at_[hidden]>

> Hello and thank you for reign my post,
>
> When I want to compile the program:
>
> #include "boost/filesystem.hpp"
>
> int main(int argc, char** argv)
> {
>     boost::filesystem::path path;
>     boost::filesystem::exists(path); //<=This is the line that causes the
> error
>
>     return 0;
> }
>
> I get the following error:
>
> "boost::filesystem2::detail::status_api(std::basic_string<char,
> std::char_traits
> <char>, std::allocator<char> > const&, boost::system::error_code&)",
>
> referenced from:
>
>
> boost::enable_if<boost::filesystem2::is_basic_path<boost::filesystem2::basic_pat
> h<std::basic_string<char, std::char_traits<char>, std::allocator<char> >,
> boost::filesystem2::path_traits> >, bool>::type boost::filesystem2::exists<
> boost::filesystem2::basic_path<std::basic_string<char,
> std::char_traits<char>,
> std::allocator<char> >, boost::filesystem2::path_traits> >(
> boost::filesystem2::basic_path<std::basic_string<char,
> std::char_traits<char>,
> std::allocator<char> >, boost::filesystem2::path_traits> const&)in main.o
>
> ld: symbol(s) not found
>
> collect2: ld returned 1 exit status
>
> I'm using XCode 3.2.4, Darwin GCC 4.2 with the Mac OSX 10.6 SDK. The
> program
> links against the libboost_system.a and libboost_filesystem.a libraries
> from
> Boost 1.45, both compiled with the same compiler.
> Boost was compiled in the most straight forward way, i.e. from the boost
> root
> directory, I invoke the only two commands:
>
> ./bootstrap.sh
>
> make
>
> Note that I haven't installed the library in /usr/local.
>
> Since the example compiles fine with the problematic line commented out,
> I assume the include path is correct, and that the linker found
> libboost_system.a (in stage/lib). I also made sure there are no other
> versions
> of boost present on my computer to eliminate the possibility of a
> header/library
> version mismatch.
>
> Also, I've tried to compile with different architectures, both in debug
> and
> release mode. I couldn't remove this error.
>
> I looked for the missing symbol in both libboost_system.a and
> libboost_filesystem.a (nm -m <library name> | c++filt), and the
> filesystem2
> namespace doesn't exist.
>
> My understanding is that the boost::filesystem2 namespace was never
> generated
> when I compiled the libraries, but for some reason is generated when I
> compile
> my little program. So I suppose there might be a definition that triggers
> or
> prevents this namespace from being created.
>
> Anyone has an idea about what should I do to remove my error?
>
> Thank you in advance,
>
> Regards,
> Nicolas
>
>
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