If the package xorg-util-macros is not installed, the build of the current git snapshot or the normal package of xf86-video-nouveau fails with:

"/bin/sh ../libtool --tag=CC --mode=link gcc -I/usr/include/xorg -I/usr/include/pixman-1 -I/usr/include/drm -I/usr/include/X11/dri -I/usr/include/drm -I/usr/include/nouveau -march=core2 -O2 -pipe -Wall -minline-all-stringops -I/usr/include/xorg -I/usr/include/pixman-1 -I/usr/include/drm -I/usr/include/X11/dri -module -avoid-version -ldrm_nouveau -o nouveau_drv.la -rpath /usr/lib/xorg/modules/drivers nouveau_calc.lo nouveau_hw.lo nouveau_exa.lo nouveau_xv.lo nouveau_dri2.lo nv_accel_common.lo nv_bios.lo nv_cursor.lo nv_dac.lo nv_dma.lo nv_dri.lo nv_driver.lo nv_hw.lo nv_setup.lo nv_shadow.lo nv_crtc.lo nv_output.lo nv_i2c.lo nv04_exa.lo nv04_xv_ovl.lo nv04_xv_blit.lo nv10_exa.lo nv10_xv_ovl.lo nv30_shaders.lo nv30_exa.lo nv30_xv_tex.lo nv40_exa.lo nv40_xv_tex.lo nv50_accel.lo nv50_cursor.lo nv50_crtc.lo nv50_dac.lo nv50_display.lo nv50_exa.lo nv50_output.lo nv50_sor.lo nv50_randr.lo nv50_connector.lo nv50_xv.lo drmmode_display.lo vl_hwmc.lo
libtool: link: gcc -shared .libs/nouveau_calc.o .libs/nouveau_hw.o .libs/nouveau_exa.o .libs/nouveau_xv.o .libs/nouveau_dri2.o .libs/nv_accel_common.o .libs/nv_bios.o .libs/nv_cursor.o .libs/nv_dac.o .libs/nv_dma.o .libs/nv_dri.o .libs/nv_driver.o .libs/nv_hw.o .libs/nv_setup.o .libs/nv_shadow.o .libs/nv_crtc.o .libs/nv_output.o .libs/nv_i2c.o .libs/nv04_exa.o .libs/nv04_xv_ovl.o .libs/nv04_xv_blit.o .libs/nv10_exa.o .libs/nv10_xv_ovl.o .libs/nv30_shaders.o .libs/nv30_exa.o
.libs/nv30_xv_tex.o .libs/nv40_exa.o .libs/nv40_xv_tex.o .libs/nv50_accel.o .libs/nv50_cursor.o .libs/nv50_crtc.o .libs/nv50_dac.o .libs/nv50_display.o .libs/nv50_exa.o .libs/nv50_output.o .libs/nv50_sor.o .libs/nv50_randr.o .libs/nv50_connector.o .libs/nv50_xv.o .libs/drmmode_display.o .libs/vl_hwmc.o -ldrm_nouveau -march=core2 -minline-all-stringops -Wl,-soname -Wl,nouveau_drv.so -o .libs/nouveau_drv.so
libtool: link: ( cd ".libs" && rm -f "nouveau_drv.la" && ln -s "../nouveau_drv.la" "nouveau_drv.la" )
make[2]: Leaving directory `/home/ranguvar/xf86-video-nouveau/src/xf86-video-nouveau-20090325/src'
Making all in man
make[2]: Entering directory `/home/ranguvar/xf86-video-nouveau/src/xf86-video-nouveau-20090325/man'
make[2]: *** No rule to make target `nouveau.@DRIVER_MAN_SUFFIX@', needed by `all-am'. Stop.
make[2]: Leaving directory `/home/ranguvar/xf86-video-nouveau/src/xf86-video-nouveau-20090325/man'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/ranguvar/xf86-video-nouveau/src/xf86-video-nouveau-20090325'
make: *** [all] Error 2"