Hi, I am trying to port my linux application which used the Boost library to windows using cygwin. When i tried to compile I am getting the following errors ../Thread/pasync.cxx:1: warning: -fPIC ignored for target (all code is position independent) ../Thread/patomic.cxx:1: warning: -fPIC ignored for target (all code is position independent) ../Thread/pmsgq.cxx:1: warning: -fPIC ignored for target (all code is position independent) ../Thread/pmtxtable.cxx:1: warning: -fPIC ignored for target (all code is position independent) ../Thread/prwlock.cxx:1: warning: -fPIC ignored for target (all code is position independent) ../Thread/psemaphore.cxx:1: warning: -fPIC ignored for target (all code is position independent) ../Thread/pthread.cxx:1: warning: -fPIC ignored for target (all code is position independent) ../../boost_1_33_1/boost/shared_ptr.hpp: In member function `T* boost::shared_ptr<T>::operator->() const [with T = LCEllaLogSource]': ../include/Shutdown.h:263: instantiated from here ../../boost_1_33_1/boost/shared_ptr.hpp:253: error: `assert' undeclared (first use this function) ../../boost_1_33_1/boost/shared_ptr.hpp:253: error: (Each undeclared identifier is reported only once for each function it appears in.) ../../boost_1_33_1/boost/shared_ptr.hpp: In member function `T* boost::shared_ptr<T>::operator->() const [with T = linx::LCShutdownObserver]': ../include/SubjectObserver.h:344: instantiated from `void GenericSubject<T1, T2>::Notify(T2&) [with T1 = linx::LCShutdownObserver, T2 = linx::LCShutdownMessage]' ../include/Shutdown.h:176: instantiated from here ../../boost_1_33_1/boost/shared_ptr.hpp:253: error: `assert' undeclared (first use this function) ../../boost_1_33_1/boost/shared_ptr.hpp: In member function `T* boost::shared_ptr<T>::operator->() const [with T = LCLogHandler<logging::LogType>]': ../include/LoggerClasses.h:274: instantiated from `bool LCLogSource<T>::SendLogMessage(T, LCLogMessage&) [with T = logging::LogType]' ../include/Shutdown.h:263: instantiated from here ../../boost_1_33_1/boost/shared_ptr.hpp:253: error: `assert' undeclared (first use this function) ../../boost_1_33_1/boost/shared_ptr.hpp: In member function `T* boost::shared_ptr<T>::operator->() const [with T = LCLogObserver]': ../include/SubjectObserver.h:344: instantiated from `void GenericSubject<T1, T2>::Notify(T2&) [with T1 = LCLogObserver, T2 = LCLogMessage]' ../include/LoggerClasses.h:275: instantiated from `bool LCLogSource<T>::SendLogMessage(T, LCLogMessage&) [with T = logging::LogType]' ../include/Shutdown.h:263: instantiated from here ../../boost_1_33_1/boost/shared_ptr.hpp:253: error: `assert' undeclared (first use this function) make: *** [Thread/pthread.o] Error 1 I am using boost provided with cygwin that is boost_1_33_1 and GCC which is 3.4.4. I have build the same application in my Ubuntu machine where GCC is 4.1.3. I am trying to upgrade GCC to some latest versions, but as of now I have not yet succeeded. Just wanted to know if it is really a problem with the compiler or it is some other problem It's being 2 days now I am looking into this issue, any help wil be highly appreciable.. With regards -- View this message in context: http://www.nabble.com/Compile-errors-in-Boost-files%2C-suspect-GCC-version-p... Sent from the Boost - Users mailing list archive at Nabble.com.