Hi, I am newbie to c/cpp and I have linking and/or loading shared library problem. I can not link with dynamic libraries. Thanks for your help in advance, Tamas *** 1 *** [violin]$ ldconfig -p | grep libboost_program_options libboost_program_options.so.1 (libc6) => /usr/lib/libboost_program_options.so.1 *** 2 *** As I do not have the file /usr/lib/libboost_program_options.so.1 I created a link: libboost_program_options.so.1 -> libboost_program_options-gcc-1_33_1.so.1.33.1 *** 3 *** Compiling my src file [violin]$ g++ -Wall -I /usr/local/include/boost-1_33_1 -c test.cpp *** 4A *** [violin]$ g++ -Wall -o test test.o /usr/local/lib/libboost_program_options-gcc-1_33_1.so.1.33.1 [violin]$ ./test ./test: error while loading shared libraries: libboost_program_options-gcc-1_33_1.so.1.33.1: cannot open shared object file: No such file or directory *** 4B *** [violin]$ g++ -Wall -o test test.o /usr/local/lib/libboost_program_options.so.1 [violin]$ ./test ./test: error while loading shared libraries: libboost_program_options-gcc-1_33_1.so.1.33.1: cannot open shared object file: No such file or directory *** 4C *** [violin]$ g++ -Wall -o test test.o /usr/local/lib/libboost_program_options-gcc-1_33_1.a [violin]$ ./test Compression level was not set. -- Tamas Hegedus, PhD | phone: (1) 919-966 0329 UNC - Biochem & Biophys | fax: (1) 919-966 5178 6107 Thurston-Bowles Bldg | mailto:hegedus@med.unc.edu Chapel Hill, NC, 27599-7248 | http://biohegedus.org