> - "External modules must be built with the same GCC version" > > As has been stated repeatedly, by Linus and others, there's no > technical reason behind this claim. It ignores the realities of how > distros release the kernel and compiler independently, with separate > cadences. Minor variances in compiler version are ABI compatible. Aren't major versions ABI compatible? Otherwise it is a different architecture. > Also, for features which are dependent on compiler version, many of > those are now enabled by kbuild. As I suggested to you previously, > kbuild should warn when such features get disabled (which can happen > due to a compiler/toolchain change or due to a .config copied from > another system). Anything that is just an optimisation (or pessimisation) really doesn't matter. AFAICT most of these options are in the latter category. One think people might do is download a kernel from kernel.org and then build an extra module for it. The compiler they have will be completely different. David - Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK Registration No: 1397386 (Wales)
