tools:fix some error use of shell command in Windows native build

Makefile

@@ -30,13 +30,6 @@ ifeq ($(wildcard .config),)
 else
 include .config
 
-# Build any necessary tools needed early in the build.
-# incdir - Is needed immediately by all Make.defs file.
-
-TOPDIR := ${shell echo $(CURDIR) | sed -e 's/ /\\ /g'}
-DUMMY  := ${shell $(MAKE) -C tools -f Makefile.host incdir \
-          INCDIR="$(TOPDIR)/tools/incdir.sh"}
-
 # Include the correct Makefile for the selected architecture.
 
 ifeq ($(CONFIG_WINDOWS_NATIVE),y)

tools/Unix.mk

@@ -19,6 +19,13 @@
 ############################################################################
 
 export TOPDIR := ${shell echo $(CURDIR) | sed -e 's/ /\\ /g'}
+
+# Build any necessary tools needed early in the build.
+# incdir - Is needed immediately by all Make.defs file.
+
+DUMMY  := ${shell $(MAKE) -C tools -f Makefile.host incdir \
+          INCDIR="$(TOPDIR)/tools/incdir.sh"}
+
 include $(TOPDIR)/Make.defs
 
 # GIT directory present

tools/Win.mk

@@ -21,6 +21,13 @@
 export SHELL=cmd
 
 export TOPDIR := ${shell echo %CD%}
+
+# Build any necessary tools needed early in the build.
+# incdir - Is needed immediately by all Make.defs file.
+
+DUMMY  := ${shell $(MAKE) -C tools -f Makefile.host incdir \
+          INCDIR="$(TOPDIR)\tools\incdir.bat"}
+
 include $(TOPDIR)\Make.defs
 -include $(TOPDIR)\.version
 
@@ -53,7 +60,7 @@ APPDIR := $(realpath ${shell if exist "$(CONFIG_APPS_DIR)\Makefile" echo $(CONFI
 # so that main Kconfig can find it. Otherwise, we redirect it to a dummy Kconfig
 # This is due to kconfig inability to do conditional inclusion.
 
-EXTERNALDIR := $(shell if [ -r $(TOPDIR)\external\Kconfig ]; then echo 'external'; else echo 'dummy'; fi)
+EXTERNALDIR := ${shell if exist "$(TOPDIR)\external\Kconfig" (echo external) else (echo dummy)}
 
 # CONTEXTDIRS include directories that have special, one-time pre-build
 #   requirements.  Normally this includes things like auto-generation of

tools/incdir.c

@@ -169,6 +169,7 @@ static enum os_e get_os(char *ccname)
       fprintf(stderr, "ERROR:  Unknown operating system: %s\n",
               buf.sysname);
     }
+
 #endif
   return OS_UNKNOWN;
 }