Looks like the glformats.c work has resulted in a broken build. This is what I get when building 7e18a039ee7a402bac4882ae793824d6523061fa:

libtool: compile:  gcc -DPACKAGE_NAME=\"Mesa\" -DPACKAGE_TARNAME=\"mesa\" -DPACKAGE_VERSION=\"8.1.0\" "-DPACKAGE_STRING=\"Mesa 8.1.0\"" "-DPACKAGE_BUGREPORT=\"https://bugs.freedesktop.org/enter_bug.cgi?product=Mesa\"" -DPACKAGE_URL=\"\" -DPACKAGE=\"mesa\" -DVERSION=\"8.1.0\" -DSTDC_HEADERS=1 -DHAVE_SYS_TYPES_H=1 -DHAVE_SYS_STAT_H=1 -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1 -DHAVE_MEMORY_H=1 -DHAVE_STRINGS_H=1 -DHAVE_INTTYPES_H=1 -DHAVE_STDINT_H=1 -DHAVE_UNISTD_H=1 -DHAVE_DLFCN_H=1 -DLT_OBJDIR=\".libs/\" -DYYTEXT_POINTER=1 -DHAVE_LIBEXPAT=1 -DHAVE_LIBXCB_DRI2=1 -I. -I../../../../../include -I../../../../../src/ -I../../../../../src/mapi -I../../../../../src/mesa/ -I../../../../../src/mesa/drivers/dri/common -D_GNU_SOURCE -DPTHREADS -DUSE_X86_64_ASM -DHAVE_POSIX_MEMALIGN -DIN_DRI_DRIVER -DUSE_XCB -DGLX_INDIRECT_RENDERING -DGLX_DIRECT_RENDERING -DUSE_EXTERNAL_DXTN_LIB=1 -DIN_DRI_DRIVER -DHAVE_ALIAS -DHAVE_MINCORE -DHAVE_LIBUDEV -DHAVE_LLVM=0x0209 -DFEATURE_GL=1 -DFEATURE_ES2=1 -I/home/joe/wayland/install/include -I/home/joe/wayland/install/include/libdrm -I/home/joe/wayland/install/include/nouveau -g -O2 -Wall -std=c99 -Werror=implicit-function-declaration -Werror=missing-prototypes -fno-strict-aliasing -fno-builtin-memcmp -g -O2 -MT nv10_state_fb.lo -MD -MP -MF .deps/nv10_state_fb.Tpo -c nv10_state_fb.c  -fPIC -DPIC -o .libs/nv10_state_fb.o
In file included from nv10_render.c:199:0:
nouveau_vbo_t.c: In function 'get_array_stride':
nouveau_vbo_t.c:48:3: error: implicit declaration of function '_mesa_sizeof_type' [-Werror=implicit-function-declaration]
cc1: some warnings being treated as errors
make[6]: *** [nv10_render.lo] Error 1