Re: [boost] [Filesystem] Linking problem with 1_46_1

Subject: Re: [boost] [Filesystem] Linking problem with 1_46_1
From: Max Moorkamp (mmoorkamp_at_[hidden])
Date: 2011-04-06 05:45:35

>> >  Max Moorkamp wrote:
>> >
>>> >>  Hi,
>>> >>
>>> >>  I have recently upgraded to boost 1_46_1 and since then I am experience
>>> >>  linking problems with the filesystem library.
>>> >>
>>> >>  I have performed a standard install using ./bootstrap.sh; bjam; bjam
>>> >>  install under Ubuntu 10.04 with the default gcc (4.4.3).
>>> >>
>> >
> I had some issues in my early attempts. My problem was with my libs
> location, then I installed this way:
>
>
>     - $ ./bootstrap.sh --with-toolset=gcc --prefix=/usr/local
>     --includedir=/usr/include --libdir=/usr/lib
>     --with-libraries=system,date_time,thread,filesystem
>     - $ ./bjam
>     - # ./bjam install
>
> Before to do it even linking lboost_system and lboost_filesystem didn't
> work.
Thanks for that. However, the linker does find the boost_filesystem 
library. If I just do

g++ test.cpp -lboost_system

then I get some additional linker errors

/tmp/cc10fHYI.o: In function `boost::filesystem3::path::codecvt()':
test.cpp:(.text._ZN5boost11filesystem34path7codecvtEv[boost::filesystem3::path::codecvt()]+0x5): 
undefined reference to `boost::filesystem3::path::wchar_t_codecvt_facet()'
/tmp/cc10fHYI.o: In function 
`boost::filesystem3::copy_file(boost::filesystem3::path const&, 
boost::filesystem3::path const&)':
test.cpp:(.text._ZN5boost11filesystem39copy_fileERKNS0_4pathES3_[boost::filesystem3::copy_file(boost::filesystem3::path 
const&, boost::filesystem3::path const&)]+0x2a): undefined reference to 
`boost::filesystem3::detail::copy_file(boost::filesystem3::path const&, 
boost::filesystem3::path const&, 
boost::filesystem3::copy_option::enum_t, boost::system::error_code*)'
collect2: ld returned 1 exit status

so it seems that in the version I have just

boost::filesystem3::detail::copy_file(boost::filesystem3::path const&, 
boost::filesystem3::path const&, 
boost::filesystem3::copy_option::enum_t, boost::system::error_code*)'

is missing.

Actually I just found one clue. If I do

nm -Ca /usr/local/lib/libboost_filesystem.so | grep 
boost::filesystem3::detail::copy_file

I get

boost::filesystem3::detail::copy_file(boost::filesystem3::path const&, 
boost::filesystem3::path const&, 
boost::filesystem3::copy_option::enum_type, boost::system::error_code*)

so the library uses boost::filesystem3::copy_option::enum_type, while 
the linker is looking for boost::filesystem3::copy_option::enum_t. This 
must have something to do
with some preprocessor macro, but I can't figure out which one and why.

Regards

Max

-- 
Max Moorkamp
IFM-GEOMAR
Wischhofstr. 1-3
24148 Kiel
Tel.: Germany - 431 - 600 2570
FAX.: Germany - 431 - 600 2915