graft lambdasoc/software/bios/3rdparty/compiler-rt/lib/builtins
-graft lambdasoc/software/bios/Makefile
+include lambdasoc/software/bios/Makefile
graft lambdasoc/software/bios/src
-graft lambdasoc/software/bios/toolchain.mk
+include lambdasoc/software/bios/toolchain.mk
graft lambdasoc/software/bios/util