can anyone help me here??
C:/mingw32/bin/../lib/gcc/i686-w64-mingw32/4.9.1/../../../../i686-w64-mingw32/bi
n/ld.exe: cannot find -lboost_system-mgw48-mt-s-1_55
C:/mingw32/bin/../lib/gcc/i686-w64-mingw32/4.9.1/../../../../i686-w64-mingw32/bi
n/ld.exe: cannot find -lboost_filesystem-mgw48-mt-s-1_55
C:/mingw32/bin/../lib/gcc/i686-w64-mingw32/4.9.1/../../../../i686-w64-mingw32/bi
n/ld.exe: cannot find -lboost_program_options-mgw48-mt-s-1_55
C:/mingw32/bin/../lib/gcc/i686-w64-mingw32/4.9.1/../../../../i686-w64-mingw32/bi
n/ld.exe: cannot find -lboost_thread-mgw48-mt-s-1_55
C:/mingw32/bin/../lib/gcc/i686-w64-mingw32/4.9.1/../../../../i686-w64-mingw32/bi
n/ld.exe: cannot find -lboost_chrono-mgw48-mt-s-1_55
collect2.exe: error: ld returned 1 exit status
seems lke a problem with your boost library , be sure you installed correctly the dependencies and double-check all the paths in your .pro file
To be more specific, your first line:
C:/mingw32/bin/../lib/gcc/i686-w64-mingw32/4.9.1/../../../../i686-w64-mingw32/bi
n/ld.exe: cannot find -lboost_system-mgw48-mt-s-1_55suggests that gcc 4.9.1 is looking for a boost built with gcc 4.8.x (multi-threaded static release mode) version 1.55
Now perhaps the compiler can't find that version because you didn't build it? Or you did, but didn't put it where gcc thinks it is? Because you told it the wrong place? Or... lots of other possibilities

Do you get the idea?
Ron