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Emmanuele Bassi authored
Newer versions of Automake warn about forward compatibility when the build uses sources in sub-directories without the subdir-objects option. Both GTK+ and GDK have an almost-but-not-quite non-recursive Automake layout, with sources in sub-directories contributing to the build of a top-level object. In theory, just adding subdir-objects to AM_INIT_AUTOMAKE would be enough, but the test suite references sources in a different top-level in order to build tests that verify the implementation of private data structures. This is not really allowed when using subdir-objects and out of srcdir builds. In order to fix this case, we require some ad hoc rules to create symbolic links in the appropriate build directory.
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