I tried building 3.14.3-1 on powerpc, and that failed with a large ABI change (about 7000 out of 13000 symbols changed). After searching for the source of the ABI change and finding no relevant source or config changes, I tried rebuilding 3.14.2-1 with the ABI reference files in place, and that also failed with the same changes (minus a few that I understand and can be ignored). Surprisingly, 3.14.2-1 was built with gcc-4.8 4.8.2-14 which is several months out of date. I'm now building with 4.8.2-21, which has many backported changes related to the powerpc port (and others). So I think that this is due to a compiler change that results in different type definitions after preprocessing: either a header is testing for a newly defined macro, or Kbuild is automatically using a new compiler option which in turn affects conditions in a header. If you can't work it out either, it should be possible to bump the ABI version for a single architecture. But we haven't tried that for a while. Ben. -- Ben Hutchings Sturgeon's Law: Ninety percent of everything is crap.
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