Noting uses libdummy.a, so don't build it. Only libdummy-nonserver.a

is actually used.

hw/xfree86/Makefile.am

@@ -40,7 +40,6 @@ XORG_LIBS = \
             libosandcommon.la \
 	    rac/librac.a \
             parser/libxf86config.a \
-            dummylib/libdummy.a \
 	    dixmods/libdixmods.la \
             @XORG_LIBS@
 

hw/xfree86/dummylib/Makefile.am

@@ -2,7 +2,7 @@
 # libdummy-nonserver.a contains additional routines normally found in the
 # server for use in building the utilities like scanpci & the config tools
 
-noinst_LIBRARIES = libdummy.a libdummy-nonserver.a
+noinst_LIBRARIES = libdummy-nonserver.a
 
 INCLUDES = $(XORG_INCS)
 
@@ -12,15 +12,6 @@ if NEED_STRLCAT
 STRL_SRCS = $(top_srcdir)/os/strlcat.c $(top_srcdir)/os/strlcpy.c
 endif
 
-libdummy_a_SOURCES = getvalidbios.c getemptypci.c \
-                     pcitestmulti.c xf86allocscripi.c \
-                     xf86addrestolist.c xf86drvmsg.c xf86drvmsgverb.c \
-                     xf86getverb.c \
-                     xf86opt.c xf86screens.c xf86servisinit.c xf86verbose.c \
-                     #xf86errorf.c xf86errorfverb.c xf86msg.c xf86msgverb.c \
-                     #logvwrite.c verrorf.c xf86info.c xalloc.c fatalerror.c \
-                     #$(srcdir)/../os-support/shared/sigiostubs.c
-
 libdummy_nonserver_a_SOURCES = \
 	fatalerror.c \
 	getvalidbios.c \