[Boost-users] bjam cross compile linking with wrong libs

Subject: [Boost-users] bjam cross compile linking with wrong libs
From: Mark Freeman (mark_at_[hidden])
Date: 2010-07-09 04:48:43

Hi,

I'm trying to cross compile a simple program using libtorrent but  
falling foul of some settings in the boost build system. I am totally  
green at using boost so please excuse me if the answer is obvious.

The problem is that the link line emitted by the boost build system  
appears to include a hard coded reference to a NATIVE lib (/usr/lib/ 
libdl.so) and not the one for the TARGET build system. Below is the  
output from the bjam command:

BOOST_ROOT = /projects/externals/libtorrent/boost_1_43_0
OS = LINUX
gcc.link bin/gcc-arm/debug/boost-source/link-static/threading-multi/ 
enum_if

     "${CROSS_COMPILE}gcc"  -Wl,-R -Wl,"/usr/lib"  -o "bin/gcc-arm/ 
debug/boost-source/link-static/threading-multi/enum_if" -Wl,--start- 
group "bin/gcc-arm/debug/boost-source/link-static/threading-multi/ 
enum_if.o" "../bin/gcc-arm/debug/boost-source/link-static/threading- 
multi/libtorrent.a" "/projects/externals/libtorrent/boost_1_43_0/ 
bin.v2/libs/thread/build/gcc-arm/debug/boost-source/link-static/ 
threading-multi/libboost_thread.a" "/projects/externals/libtorrent/ 
boost_1_43_0/bin.v2/libs/filesystem/build/gcc-arm/debug/boost-source/ 
link-static/threading-multi/libboost_filesystem.a" "/projects/ 
externals/libtorrent/boost_1_43_0/bin.v2/libs/system/build/gcc-arm/ 
debug/boost-source/link-static/threading-multi/libboost_system.a" "/ 
usr/lib/libdl.so"  -Wl,-Bstatic -lssl -lcrypto -Wl,-Bdynamic -lrt - 
Wl,--end-group -g -pthread -export-dynamic

/usr/lib/libdl.so: could not read symbols: File in wrong format
collect2: ld returned 1 exit status
...failed updating 1 target...

(CROSS_COMPILE has been set to the prefix for the toolset)

I did add a <linkflags> entry to the GCC entry in usr-config.jam and  
sure enough this did appear in the emitted link line however /usr/lib  
was still there too and seemed to take precedence. Does anyone know  
what I have to do to remove this?

Cheers,

Mark.