K 10
svn:author
V 7
zeising
K 8
svn:date
V 27
2020-06-09T19:56:17.177049Z
K 7
svn:log
V 583
mesa: Fix build empty DRI_DRIVER

In some cases, such as on sparc64, armv6 and armv7 etc, DRI_DRIVER,
GALLIUM_DRIVER and/or VULKAN_DRIVER might be undefined.  This causes an
error similar to
make: "/usr/ports/graphics/mesa-dri/Makefile" line 106: Malformed conditional (${DRI_DRIVERS:M${:UI915}})

Fix this by checking if [DRI,GALLIUM,VULKAN]_DRIVER is defined before
checking what it is set to.

While here, remove textproc/py-mako dependency from mesa-dri/Makefile, it's
already included in mesa-dri/Makefile.common, no need to depend on it twice.

PR:		247117
Reported by:	jbeich

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