Add some more host tools

Makefile

@@ -91,18 +91,26 @@ endif
 ifndef HOSTCXX
 HOSTCXX:=g++
 endif
+ifndef HOSTCPP
+HOSTCPP:=cpp
+endif
 ifndef HOSTLD
 HOSTLD:=ld
 endif
 ifndef HOSTLN
 HOSTLN:=ln
 endif
+ifndef HOSTNM
+HOSTNM:=nm
+endif
 HOSTAR:=$(shell $(CONFIG_SHELL) -c "which $(HOSTAR)" || type -p $(HOSTAR) || echo ar)
 HOSTAS:=$(shell $(CONFIG_SHELL) -c "which $(HOSTAS)" || type -p $(HOSTAS) || echo as)
 HOSTCC:=$(shell $(CONFIG_SHELL) -c "which $(HOSTCC)" || type -p $(HOSTCC) || echo gcc)
 HOSTCXX:=$(shell $(CONFIG_SHELL) -c "which $(HOSTCXX)" || type -p $(HOSTCXX) || echo g++)
+HOSTCPP:=$(shell $(CONFIG_SHELL) -c "which $(HOSTCPP)" || type -p $(HOSTCPP) || echo cpp)
 HOSTLD:=$(shell $(CONFIG_SHELL) -c "which $(HOSTLD)" || type -p $(HOSTLD) || echo ld)
 HOSTLN:=$(shell $(CONFIG_SHELL) -c "which $(HOSTLN)" || type -p $(HOSTLN) || echo ln)
+HOSTNM:=$(shell $(CONFIG_SHELL) -c "which $(HOSTNM)" || type -p $(HOSTNM) || echo nm)
 ifndef CFLAGS_FOR_BUILD
 CFLAGS_FOR_BUILD:=-g -O2
 endif