Simplify makefile boilerplate code.
Don't define ASM_SOURCES variable globally -- reserve that variable to be defined
locally by makefiles, together with C_SOURCES and CPP_SOURCES.
diff --git a/configs/linux-solo b/configs/linux-solo
index d49b972..3145e12 100644
--- a/configs/linux-solo
+++ b/configs/linux-solo
@@ -33,7 +33,7 @@
CXXFLAGS = $(WARN_FLAGS) $(OPT_FLAGS) $(PIC_FLAGS) $(ARCH_FLAGS) $(DEFINES)
-ASM_SOURCES =
+MESA_ASM_SOURCES =
# Library/program dependencies
DRI_LIB_DEPS = -lm -lpthread -lexpat -ldl -L$(TOP)/$(LIB_DIR) $(PCIACCESS_LIB)