Ian Lance Taylor writes: > Jim Beecher <jbeecher@xxxxxxxxxxxxxxxxxx> writes: >> Is there documentation on how to create '.lib' (library) files in the >> GCC docs-- or is this covered in 'make' docs? I have read the gcc.pdf >> manual and found nothing on creating a library. I would like be able >> to make libraries via WinAVR (through the IDE, that is-- is this >> possible already?). > The compiler does not make libraries. On Unix or GNU/Linux libraries > are created using the ar command, which is not part of the compiler. I > assume that on Windows there is some similar command, but I don't know > what it is. You may do better to ask on a Windows mailing list.q > > Ian As a generic query, I'd recommend using libtool for a *nix system, as it will take care of using ar, arcane linker parameters or whatever needed to create shared or dynamic libraries. In this case, however, the ar suggestion seems right. There are no dynamic libraries there, and the host is irrelevant, too as you're cross-compiling. There is an ar.exe command provided with WinAVR. You could create the .o files, then join them all in a library using ar r libFOO.a file1.o file2.o ... Note that the filename you choose *must* begin with "lib" and end with ".a". This way you can use -lFOO as a parameter to the linker and it will grab the libFOO.a file. I don't know which IDE you're using (WinAVR is the compiler bundle, not an IDE), but I don't think it'll support creating the libraries. You can however make use of your libraries in your IDE. A further consideration: the libraries hold object files. That's code already compiled for an architecture. If you later change the microcontroller you're targetting, or the cpu frequency (and it's used inside the library, of course), the library won't notice. You'd need to regenerate it or to several different copies with different profiles, and link with the appropiate one. Best regards
