Hello, I have a problem with ?I option of gcc. I am using: Redhat 7.2; Kernal 2.4.7-10 and gcc 2.96. When I am trying to compile I get the error: /usr/g++-v3/bits/std_iosfwd.h:39:28: bits/c++config.h: No such file or directory So I checked std_iosfwd.h and it includes c++config.h using: #include <bits/c++config.h> I could find the c++config.h file at: /usr/include/g++-v3/i386-redhat-linux/bits/c++config.h /usr/include/g++-v3/c++config.h Because std_iosfwd.h wants something with bits I tried this two ?I options: -I /usr/include/g++-v3/i386-redhat-linux/bits -I /usr/include/g++-v3/i386-redhat-linux The c++config.h file was still not found by the gcc. Please could anybody help me? Thank you!!