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, <jayc.lawrence@gmail.com> 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, <jayc.lawrence@gmail.com <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 <boost/date_time/posix_time/posix_time.hpp> > > 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 > <boost/date_time/posix_time/posix_time.hpp>' > I can't figure out what I'm missing > > >
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