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Alexander Huemer alexander.huemer at xx.vuOn Wed, Jun 17, 2015 at 07:47:45AM +0200, Holger Freyther wrote: > > On 16 Jun 2015, at 23:23, Andreas Rottmann <mail at rotty.xx.vu> wrote: > > > > From: Andreas Rottmann <a.rottmann at gmx.at> > > > > Having subdir-objects enabled is recommended by automake 1.14, to avoid > > future incompatibilities. > > > > However, adding that option breaks out-of-tree builds, and also seems to > > break "make distclean" for in-tree builds. The reason is that > > apparently, automake with subdir-objects enabled cannot cope with source > > files in a different, non-child directory. To avoid that, we simply > > compile the files referenced in this way into a static library in their > > own source directory, and instead of referencing the source files, we > > link against that library. > > > > Besides making the build system a bit more future proof, this change > > also potentially enhances build times, as it reduces the number of > > compiler invocations, in exchange a slight increase of "ar" invocations. > > That automake behavior is shameful. What would be the effort to get rid > off the recursive make? AFAIR there was a patch series a few years ago from Diego Elio Pettenò (flameeyes) that changed the build system behavior of several osmo* subprojects to use non recursive make. There were objections against them, so they were not merged. Kind regards, -Alex