The commit in the provided URL for a portability fix from NetBSD to configure.ac causes DAMAGE support to not be built in radeon driver when "--enable-dri" is passed to configure. Support for DRI itself is still enabled though. This commit causes the tests for dri.h, sarea.h, dristruct.h and damage.h to be not actually be done as the preceding test --- if test "x$DRI" = xauto; then --- does not match as DRI is set to yes.
Same problem here, my distro compiles the driver with --enable-dri and in my log I found: "Page Flipping disabled because Damage layer not available at build time".
patch reverted.
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