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From: Gaurav Jain-SJR (Gaurav.Jain_at_[hidden])
Date: 2007-11-20 08:28:29
Christopher Cambly <ccambly <at> ca.ibm.com> writes:
>
> "Gaurav Jain-SJR" <Gaurav.Jain <at> iflexsolutions.com> wrote on
11/19/2007
> 06:58:42 AM:
>
> >
> > Hi,
> >
> > // samp.cpp Boost Library Example
> > #include <iostream>
> > #include <string>
> > #include <cstdlib>
> > #include <fstream>
> > #include "boost/filesystem/operations.hpp"
> > #include "boost/filesystem/path.hpp"
> > #include "boost/filesystem/exception.hpp"
> > #include "boost/filesystem/convenience.hpp"
> > #include "boost/filesystem/fstream.hpp"
> > using namespace std;
> >
> > int main( int argc, char* argv[] )
> > {
> >
> > if ( argc != 2 )
> > {
> > std::cout << "Usage: file_size path\n";
> > return 1;
> > }
> >
> > std::cout << "sizeof(intmax_t) is " << sizeof(boost::intmax_t) <<
> > '\n';
> >
> > boost::filesystem::path p( argv[1], boost::filesystem::native );
> >
> > if ( !boost::filesystem::exists( p ) )
> > {
> > std::cout << "not found: " << argv[1] << std::endl;
> > return 1;
> > }
> >
> > if ( boost::filesystem::is_directory( p ) )
> > {
> > std::cout << "not a file: " << argv[1] << std::endl;
> > return 1;
> > }
> >
> > std::cout << "size of " << argv[1] << " is " <<
> > boost::filesystem::file_size( p )
> > << std::endl;
> > return 0;
> > }
> >
> > I tried to build the above sample which comes with BOOST File System
> > library on AIX 5.3. It got failed at link time.
> > The detail of this activity is as follow:
> >
> > Compiler Details: XL C/C++ Enterprise Edition V9.0
> >
> > OS Details:- AIX 5.3
> >
> > Boost Version:- 1_34_0 (32 bit build)
> >
> > Command for building the boost libraries:-
> >
> > $bjam --v2 install toolset=vacpp --prefix=$HOME/1_34_1/32
> > --builddir=$HOME/tmp variant=release runtime-link=static,shared
> > threading=single,multi --without-python Jamfile.v2
> >
> > "samp.cpp":- Compilation Command
> >
> > $xlC_r -q32 -I/home/1_34_0/include samp.cpp -L/home/1_34_0/lib
> > -lboost_filesystem-xlc-mt-1_34
> >
> > ld: 0711-317 ERROR: Undefined symbol:
> > .boost::filesystem::detail::last_write_time_api(
> > const
std::basic_string<char,std::char_traits<char>,std::allocator<char>
> > >&,int)
> > ld: 0711-345 Use the -bloadmap or -bnoquiet option to obtain more
> > information.
> >
> >
> > I tried to find a solution on google and came across with the
following:
> >
> >
http://beta.boost.org/development/tests/trunk/output/IBM_Canada_Ltd-boos
> >
t-bin-v2-libs-filesystem-test-operations_test_dll-test-vacpp-debug.html
> >
> > Even the regression test result on IBM site indicates that the
certain
> > test case of file system library isn't working:
> >
> >
http://www-1.ibm.com/support/docview.wss?rs=2030&context=SSJT9L&uid=swg2
> > 7010184
> >
> >
> > I am not directly using the
> > "boost::filesystem::detail::last_write_time_api" in my code, but I
am
> > not sure whether any other API's which I am using in my code, is
using
> > it indirectly.
> >
> > Can somebody suggest me a work around to resolve this?
> >
> >
> > Regards,
> > Gaurav Jain
> >
>
> The symbol referenced from operations_test.cpp, or in your case
samp.cpp
> is:
>
> boost::filesystem::detail::last_write_time_api(const
> std::basic_string<char,std::char_traits<char>,std::allocator<char>
>&,int)
>
> the symbol defined in the archive of Boost.Filesystem is:
>
> boost::filesystem::detail::last_write_time_api(const
> std::basic_string<char,std::char_traits<char>,std::allocator<char>
>&,long)
>
> The problem originates with the last parameter, std::time_t, of the
> function boost::filesystem::detail::last_write_time_api(). In the
> Boost.Filesystem header, boost/filesystem/operations.hpp the function
> last_write_time() is declared as:
>
> last_write_time( const Path & ph, const std::time_t new_time)
>
> where std::time_t is typedef'ed to time_t which is defined as an int
in
> /usr/include/time.h. However, inside
libs/filesystem/src/operations.cpp
> where the definition of the function last_write_time() resides there
is
> some code which changes the underlying type of time_t to a long ie)
>
> // enable the XPG-compliant version of readdir_r() on AIX
> #if defined(_AIX)
> # define _LINUX_SOURCE_COMPAT
> #endif
>
> This #define of _LINUX_SOURCE_COMPAT changes the time_t from an int to
a
> long. So the declaration of last_write_time() has std::time_t as an
int
> whereas the definition has std::time_t as a long, thus the link error
> message.
>
> There are two ways to fix this:
>
> 1) Compile samp.cpp with -D_LINUX_SOURCE_COMPAT but be warned this
changes
> more than time_t
>
> 2) The best fix is to remove the define for LINUX_SOURCE_COMPAT and
add
> checks around the call to readdir_r to make sure that _AIX and
> __THREAD_SAFE ie) the thread safe version of the compiler on AIX is
being
> called so readdir_r() works correctly.
>
> Here is a libs/filesystem/src/operations.cpp patch for Boost trunk:
> (See attached file: operations.cpp.trunk.patch)
>
> Here is a libs/filesystem/src/operations.cpp patch for Boost.1.34.1:
>
> (See attached file: operations.cpp.1.34.patch)
>
> Chris Cambly
> IBM XL Compiler Development
> Attachment (operations.cpp.trunk.patch): application/octet-stream,
1067 bytes
> Attachment (operations.cpp.1.34.patch): application/octet-stream, 1082
bytes
>
Thanks a lot this solved my problem. I am also facing another problem
while building boost. If I build it with the following command :
$bjam --v2 install toolset=vacpp --prefix=$HOME/1_34_0/32
--builddir=$HOME/tmp variant=release runtime-link=static,shared
threading=single,multi --without-python Jamfile.v2
vacpp.compile.c++
bin.v2/libs/wave/build/vacpp/release/link-static/runtime-link-static
/instantiate_cpp_grammar.o
Build seems to me hanging after this. Though I am not facing a same
problem if I specify the every target library to be built with bjam
command.
Regards,
Gaurav Jain
"There are two ways to write error-free programs; only the third works."
-Alan J. Perlis
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