I just updated git and tried to build.  It dies with:

mv -f .deps/glxdri.Tpo .deps/glxdri.Plo
../doltcompile /usr/bin/gcc -DHAVE_CONFIG_H -I. -I../include -I../hw/xfree86/os-
support -I../hw/xfree86/os-support/bus -I../hw/xfree86/common -I../hw/xfree86/dr
i -I../mi -I../hw/xfree86/dri2   -DHAVE_DIX_CONFIG_H -Wall -Wpointer-arith -Wstr
ict-prototypes -Wmissing-prototypes -Wmissing-declarations -Wnested-externs -fno
-strict-aliasing -Wbad-function-cast -Wformat=2 -Wold-style-definition -Wdeclara
tion-after-statement  -D_BSD_SOURCE -DHAS_FCHOWN -DHAS_STICKY_DIR_BIT -I/usr/inc
lude/freetype2 -I/usr/include/pixman-1   -I../include -I../include -I../Xext -I.
./composite -I../damageext -I../xfixes -I../Xi -I../mi -I../miext/shadow  -I../m
iext/damage -I../render -I../randr -I../fb -fvisibility=hidden -I/usr/include/dr
m -I/usr/include/drm -I/usr/include/drm -I/usr/include/X11/dri -DXFree86Server  
-O0 -g -MT glxdri2.lo -MD -MP -MF .deps/glxdri2.Tpo -c -o glxdri2.lo glxdri2.c
glxdri2.c: In function '__glXDRIdrawableSwapBuffers':
glxdri2.c:221: error: '__DRI2flushExtension' has no member named 'flushInvalidat
e'

(I just updated/rebuilt/installed drm and mesa as well).