The array_cache sources don't exist anymore in the Mesa tree,

so we shouldn't try to build them.

GL/mesa/Makefile.am

@@ -1,11 +1,10 @@
-SUBDIRS = main math array_cache swrast swrast_setup tnl shader X glapi
+SUBDIRS = main math swrast swrast_setup tnl shader X glapi
 
 noinst_LTLIBRARIES = libGLcore.la
 
 libGLcore_la_SOURCES = dummy.c
 libGLcore_la_LIBADD = main/libmain.la \
                       math/libmath.la \
-                      array_cache/libac.la \
                       swrast/libswrast.la \
                       swrast_setup/libss.la \
                       tnl/libtnl.la \