Early on LLVM's Clang compiler offered much better debugging / error messages than GCC but in the past few years the GNU Compiler Collection developers have been working on generating more helpful messages too.
In a setback to the Christoph Hellwig's efforts to enforce the GPL on code that he wrote in the Linux kernel, his suit against VMware in Germany has been dismissed on procedural grounds. The court ruled that he had not provided enough specificity about the code he was claiming had been used by the company. The merits of the GPL and whether the two main parts of VMware's product constitute a derived work of the kernel were not even considered. There may be another chance for the court to do so, however, as Hellwig will appeal the dismissal.