I have a third-party DLL (with .h file, but without source code) that was compiled using Borland compiler. The DLL came with a help file which includes an example 'main' program. The help file states that a .lib file must be created from the DLL using your respective compiler.. So here is what I have attempted: 1) created a .def file using Borland's 'impdef' program: impdef DataIO.def DataIO.dll 2) then created the .lib using 'dlltool' : dlltool --dllname DataIO.dll --input-def DataIO.def --output-lib DataIO.lib 3) Now, when I try to compile (on windows) the provided example main program using: g++ -L. main.cpp -lDataIO -o main.exe I get 'undefined reference' errors to functions that are defined in the library... Am I missing something or doing something wrong? Any help would be greatly appreciated! -- View this message in context: http://www.nabble.com/Undefined-Reference-errors...-tp23840969p23840969.html Sent from the gcc - Help mailing list archive at Nabble.com.