On 19 March 2015 at 19:01, John Snow <js...@redhat.com> wrote: > Test if ccache is interfering with our life, and > disable its habit of trying to compile already pre-processed > versions of code if so. > > In particular, clang has different semantic warnings based on > if the warning arose from a macro or not. By trying to build > preprocessed versions of code, we get more errors than we should. > > ccache allows us to disable this feature, opting instead to > compile the original version instead of its preprocessed version. > > This makes ccache much slower for cache misses, but at least it > becomes usable with QEMU/clang. > > Thanks to Peter Eisentraut for his writeup on the issue: > http://peter.eisentraut.org/blog/2014/12/01/ccache-and-clang-part-3/
This is really working around a bug in either ccache or in the way Fedora has configured ccache, so I kind of feel it ought to be dealt with there. However I don't object too much to our including the workaround in our configure... -- PMM
