Re: [Boost-users] Simple Linking Error

29 Nov 2007


      Here's the output:
$  g++ -v -s -I/usr/include/boost -lboost_date_time -pthread ./timer.cpp -o
./timer
Using built-in specs.
Target: i486-pc-linux-gnu
Configured with: /var/tmp/portage/sys-devel/gcc-4.1.2/work/gcc-4.1.2/configure
--prefix=/usr --bindir=/usr/i486-pc-linux-gnu/gcc-bin/4.1.2
--includedir=/usr/lib/gcc/i486-pc-linux-gnu/4.1.2/include
--datadir=/usr/share/gcc-data/i486-pc-linux-gnu/4.1.2
--mandir=/usr/share/gcc-data/i486-pc-linux-gnu/4.1.2/man
--infodir=/usr/share/gcc-data/i486-pc-linux-gnu/4.1.2/info
--with-gxx-include-dir=/usr/lib/gcc/i486-pc-linux-gnu/4.1.2/include/g++-v4
--host=i486-pc-linux-gnu --build=i486-pc-linux-gnu --disable-altivec
--enable-nls --without-included-gettext --with-system-zlib
--disable-checking --disable-werror --enable-secureplt
--disable-libunwind-exceptions --disable-multilib --enable-libmudflap
--disable-libssp --disable-libgcj --with-arch=i486
--enable-languages=c,c++,fortran --enable-shared --enable-threads=posix
--enable-__cxa_atexit --enable-clocale=gnu
Thread model: posix
gcc version 4.1.2 (Gentoo 4.1.2 p1.0.2)
 /usr/libexec/gcc/i486-pc-linux-gnu/4.1.2/cc1plus -quiet -v
-I/usr/include/boost -D_GNU_SOURCE -D_REENTRANT ./timer.cpp -quiet -dumpbase
timer.cpp -march=i486 -auxbase timer -version -o /tmp/cc9RRPjp.s
ignoring nonexistent directory
"/usr/lib/gcc/i486-pc-linux-gnu/4.1.2/../../../../i486-pc-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/include/boost
 /usr/lib/gcc/i486-pc-linux-gnu/4.1.2/include/g++-v4
 /usr/lib/gcc/i486-pc-linux-gnu/4.1.2/include/g++-v4/i486-pc-linux-gnu
 /usr/lib/gcc/i486-pc-linux-gnu/4.1.2/include/g++-v4/backward
 /usr/local/include
 /usr/lib/gcc/i486-pc-linux-gnu/4.1.2/include
 /usr/include
End of search list.
GNU C++ version 4.1.2 (Gentoo 4.1.2 p1.0.2) (i486-pc-linux-gnu)
        compiled by GNU C version 4.1.2 (Gentoo 4.1.2 p1.0.2).
GGC heuristics: --param ggc-min-expand=46 --param ggc-min-heapsize=30755
Compiler executable checksum: 4ca4b00b3bea7fbbb8f68a78703ea1b5
 /usr/lib/gcc/i486-pc-linux-gnu/4.1.2/../../../../i486-pc-linux-gnu/bin/as
-V -Qy -o /tmp/ccgiUm3Z.o /tmp/cc9RRPjp.s
GNU assembler version 2.16.1 (i486-pc-linux-gnu) using BFD version 2.16.1
 /usr/libexec/gcc/i486-pc-linux-gnu/4.1.2/collect2 --eh-frame-hdr -m
elf_i386 -dynamic-linker /lib/ld-linux.so.2 -o ./timer -s
/usr/lib/gcc/i486-pc-linux-gnu/4.1.2/../../../crt1.o
/usr/lib/gcc/i486-pc-linux-gnu/4.1.2/../../../crti.o
/usr/lib/gcc/i486-pc-linux-gnu/4.1.2/crtbegin.o
-L/usr/lib/gcc/i486-pc-linux-gnu/4.1.2
-L/usr/lib/gcc/i486-pc-linux-gnu/4.1.2
-L/usr/lib/gcc/i486-pc-linux-gnu/4.1.2/../../../../i486-pc-linux-gnu/lib
-L/usr/lib/gcc/i486-pc-linux-gnu/4.1.2/../../.. -lboost_date_time
/tmp/ccgiUm3Z.o -lstdc++ -lm -lgcc_s -lgcc -lpthread -lc -lgcc_s -lgcc
/usr/lib/gcc/i486-pc-linux-gnu/4.1.2/crtend.o
/usr/lib/gcc/i486-pc-linux-gnu/4.1.2/../../../crtn.o
/tmp/ccgiUm3Z.o: In function `__static_initialization_and_destruction_0(int,
int)':
timer.cpp:(.text+0x13b): undefined reference to
`boost::system::get_system_category()'
timer.cpp:(.text+0x145): undefined reference to
`boost::system::get_posix_category()'
timer.cpp:(.text+0x14f): undefined reference to
`boost::system::get_posix_category()'
timer.cpp:(.text+0x159): undefined reference to
`boost::system::get_system_category()'
collect2: ld returned 1 exit status

On Nov 29, 2007 12:06 PM,  wrote:
...
Hi Daniel,
I just did a little digging, regarding that particular error it has been
suggested previously to add -pthread to your compile string. Could you
give us more output like what other undefined references there are?
Jay
Daniel wrote:
...
including the -I/path/to/boost seemed to do the trick, however, once I
started utilizing it (asio/date_time) I started getting things such as
undefined reference to `pthread_detach'
Code directly taken from the tutorial here:
http://asio.sourceforge.net/boost_asio_0_3_7/libs/asio/doc/tutorial/tuttimer...
...
Is there a list of the exact library names in boost/asio?
On Nov 29, 2007 11:27 AM, mailto:jayc.lawrence@gmail.com> wrote:
Hi Daniel,
Where were your boost header files and libraries compiled to? I had
    similar issues and John Maddock helped me solve a path issue. Try
adding
...
-I/path/to/boost
to your compile string e.g
g++ -v -s -I/path/to/boost myfile.cpp -o myfile.exe
you might need to add the relevant -lboost_library_name_goes_here to
the
...
end of that compile string, where boost_library_name_goes_here is
the
...
name of the library you are using.
I thought this would be easier on linux than windows to be honest
and
...
here you are having some problems !
Hope this helps.
Jay
Daniel wrote:
     > I wrote a simple "Hello, world!" program to test if boost/asio
was
...
> working correctly:
     >
     > #include <iostream>
     > #include 
     >
     > int main()
     > {
     >   std::cout << "Hello, world!\n";
     >   return 0;
     > }
     >
     > But, I get this: (GCC C++ 4.1.2/Linux version 2.6.22-gentoo-r8)
     > test.cpp:(.text+0x10b): undefined reference to
     > `boost::system::get_system_category()'
     > test.cpp:(.text+0x115): undefined reference to
     > `boost::system::get_posix_category()'
     > test.cpp:(.text+0x11f): undefined reference to
     > `boost::system::get_posix_category()'
     > test.cpp:(.text+0x129): undefined reference to
     > `boost::system::get_system_category()'
     >
     >
     > This happens when I used '#include
     > '
     > I can't figure out what I'm missing
     >
     >
     >
------------------------------------------------------------------------
...
>
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     > Boost-users@lists.boost.org mailto:Boost-users@lists.boost.org
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