Compiling on Ubuntu 12.04 leads to this error:

make[3]: Entering directory
`/build/buildd/xserver-xorg-video-nouveau-1.0.6+git1302061522.e8f222~gd~p/build/src'
  CC     nouveau_exa.lo
../../src/nouveau_exa.c: In function 'nouveau_exa_create_pixmap':
../../src/nouveau_exa.c:142:31: error: 'CREATE_PIXMAP_USAGE_SHARED' undeclared
(first use in this function)
../../src/nouveau_exa.c:142:31: note: each undeclared identifier is reported
only once for each function it appears in
make[3]: *** [nouveau_exa.lo] Error 1

Full log here:
https://launchpadlibrarian.net/130533746/buildlog_ubuntu-precise-i386.xserver-xorg-video-nouveau_1%3A1.0.6%2Bgit1302061522.e8f222~gd~p_FAILEDTOBUILD.txt.gz

Compiles fine on Ubuntu 12.10.