Hi! I am using xcode 3.1 and I am trying to build a 32bit boost test application. I have done this successfully on windows (Header only libraries are working fine in xcode). These are the steps I followed: 1) ./configure --with-libraries=date_time,filesystem,iostreams,program_options,serialization,system,thread 2) sudo make install I dont get any error and the installation says it updated all targets. 3) Next, I create a simple thread application to test: #include <boost/thread/thread.hpp> #include <iostream> void hello() { std::cout <<"Hello world, I'm a thread!"<< std::endl; } int main(int argc, char* argv[]) { boost::thread myThread(&hello); myThread.join(); return 0; } 4) I go to project > edit project settings and add the following two paths in the search path section: /usr/local/lib (for library path) and /usr/local/include/boost-1_37 for header path. BOOST_ROOT is set as /Users/Framebuffer/boost_1_37_0 I have even tried to change it to /usr/local/ but the errors persist I have examined the two folders and the libraries and headers are indeed present there (for eg, libboost_thread-xgcc40-mt-1_37.dylib is in the lib folder) 5) When I try to compile either the debug or release version, I get errors. Here are the errors for debug build results: ========================================== ========================================== Building target “boost” of project “boost” with configuration “Debug” — (9 errors) Checking Dependencies cd /Users/framebuffer/Desktop/boost /Developer/usr/bin/gcc-4.0 -x c++ -arch i386 -fmessage-length=0 -pipe -Wno-trigraphs -fpascal-strings -fasm-blocks -O0 -Wreturn-type -Wunused-variable -D_GLIBCXX_DEBUG=1 -D_GLIBCXX_DEBUG_PEDANTIC=1 -isysroot /Developer/SDKs/MacOSX10.5.sdk -mfix-and-continue -fvisibility-inlines-hidden -mmacosx-version-min=10.5 -gdwarf-2 -iquote /Users/framebuffer/Desktop/boost/build/boost.build/Debug/boost.build/boost-generated-files.hmap -I/Users/framebuffer/Desktop/boost/build/boost.build/Debug/boost.build/boost-own-target-headers.hmap -I/Users/framebuffer/Desktop/boost/build/boost.build/Debug/boost.build/boost-all-target-headers.hmap -iquote /Users/framebuffer/Desktop/boost/build/boost.build/Debug/boost.build/boost-project-headers.hmap -F/Users/framebuffer/Desktop/boost/build/Debug -I/Users/framebuffer/Desktop/boost/build/Debug/include -I/usr/local/include/boost-1_37 -I/Users/framebuffer/Desktop/boost/build/boost.build/Debug/boost.build/DerivedSources -c /Users/framebuffer/Desktop/boost/main.cpp -o /Users/framebuffer/Desktop/boost/build/boost.build/Debug/boost.build/Objects-normal/i386/main.o cd /Users/framebuffer/Desktop/boost /Developer/usr/bin/g++-4.0 -arch i386 -isysroot /Developer/SDKs/MacOSX10.5.sdk -L/Users/framebuffer/Desktop/boost/build/Debug -L/Developer/SDKs/MacOSX10.5.sdk/usr/local/lib -F/Users/framebuffer/Desktop/boost/build/Debug -filelist /Users/framebuffer/Desktop/boost/build/boost.build/Debug/boost.build/Objects-normal/i386/boost.LinkFileList -mmacosx-version-min=10.5 -o /Users/framebuffer/Desktop/boost/build/Debug/boost Undefined symbols: "boost::thread::join()", referenced from: _main in main.o "boost::thread::~thread()", referenced from: _main in main.o _main in main.o "boost::thread_resource_error::thread_resource_error()", referenced from: boost::mutex::mutex()in main.o boost::condition_variable::condition_variable()in main.o "vtable for boost::detail::thread_data_base", referenced from: __ZTVN5boost6detail16thread_data_baseE$non_lazy_ptr in main.o "typeinfo for boost::thread_resource_error", referenced from: __ZTIN5boost21thread_resource_errorE$non_lazy_ptr in main.o "boost::thread::start_thread()", referenced from: boost::thread::thread<void (*)()>(void (*)(), boost::disable_if<boost::is_convertible<void (*&)(), boost::detail::thread_move_t<void (*)()> >, boost::thread::dummy*>::type)in main.o "boost::detail::thread_data_base::~thread_data_base()", referenced from: boost::detail::thread_data<void (*)()>::~thread_data()in main.o boost::detail::thread_data<void (*)()>::~thread_data()in main.o "boost::thread_resource_error::~thread_resource_error()", referenced from: __ZN5boost21thread_resource_errorD1Ev$non_lazy_ptr in main.o "typeinfo for boost::detail::thread_data_base", referenced from: typeinfo for boost::detail::thread_data<void (*)()>in main.o ld: symbol(s) not found collect2: ld returned 1 exit status "boost::thread::join()", referenced from: _main in main.o "boost::thread::~thread()", referenced from: _main in main.o _main in main.o "boost::thread_resource_error::thread_resource_error()", referenced from: boost::mutex::mutex()in main.o boost::condition_variable::condition_variable()in main.o "vtable for boost::detail::thread_data_base", referenced from: __ZTVN5boost6detail16thread_data_baseE$non_lazy_ptr in main.o "typeinfo for boost::thread_resource_error", referenced from: __ZTIN5boost21thread_resource_errorE$non_lazy_ptr in main.o "boost::thread::start_thread()", referenced from: boost::thread::thread<void (*)()>(void (*)(), boost::disable_if<boost::is_convertible<void (*&)(), boost::detail::thread_move_t<void (*)()> >, boost::thread::dummy*>::type)in main.o "boost::detail::thread_data_base::~thread_data_base()", referenced from: boost::detail::thread_data<void (*)()>::~thread_data()in main.o boost::detail::thread_data<void (*)()>::~thread_data()in main.o "boost::thread_resource_error::~thread_resource_error()", referenced from: __ZN5boost21thread_resource_errorD1Ev$non_lazy_ptr in main.o "typeinfo for boost::detail::thread_data_base", referenced from: typeinfo for boost::detail::thread_data<void (*)()>in main.o ld: symbol(s) not found collect2: ld returned 1 exit status Build failed (9 errors) ========================================== ========================================== Both files libboost_thread-xgcc40-mt-1_37.dylib and libboost_thread-xgcc40-mt-1_37.a are present in /usr/local/lib What am I missing? Any help will be appreciated. ALSO, I tried to compile and run a date time example, and it seems to be working fine. (Both debug and release) Below is the code that is working. Other libraries like filesystem etc and not working though. #include "boost/date_time/gregorian/gregorian.hpp" #include "boost/date_time/posix_time/posix_time.hpp" #include <iostream> using namespace boost::gregorian; using namespace boost::posix_time; int main() { date d(2002,Feb,1); //an arbitrary date ptime t1(d, hours(5)+milliseconds(100)); //date + time of day offset ptime t2 = t1 - minutes(4)+seconds(2); ptime now = second_clock::local_time(); //use the clock date today = now.date(); //Get the date part out of the time date tomorrow = today + date_duration(1); ptime tomorrow_start(tomorrow); //midnight //input streaming std::stringstream ss("2004-Jan-1 05:21:33.20"); ss >> t2; //starting at current time iterator adds by one hour time_iterator titr(now,hours(1)); for (; titr < tomorrow_start; ++titr) { std::cout << (*titr) << std::endl; } return 0; } I found this tutorial : http://soulstorm-creations.com/PROJECT_SOULSTORM_2_0/index.php?option=com_content&view=article&id=47:xcode-and-boost-liraries-a-setup-tutorial-article&catid=18:programming-articles&Itemid=39 and I tried his method and its giving the same 9 errors out of the box. Thanks, fb. -- View this message in context: http://www.nabble.com/Unable-to-use-boost-libraries-with-xcode-3.1-tp2082702... Sent from the Boost - Users mailing list archive at Nabble.com.